Add json schema and cli lint command (#342)

- Add json schema file
- Add tests to validate sample pipeline files
- Add new command `lint` to cli to test a directory or single file to use correct schema

Example:  `woodpecker-cli lint ./pipeline/schema/.woodpecker/`

---
close #275 
preparation for #276 


Co-authored-by: 6543 <6543@obermui.de>

cli/lint/lint.go

@@ -0,0 +1,65 @@
+package lint
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/urfave/cli"
+	"github.com/woodpecker-ci/woodpecker/pipeline/schema"
+)
+
+// Command exports the info command.
+var Command = cli.Command{
+	Name:      "lint",
+	Usage:     "lint a pipeline configuration file",
+	ArgsUsage: "[path/to/.woodpecker.yml]",
+	Action:    lint,
+	Flags:     []cli.Flag{},
+}
+
+func lint(c *cli.Context) error {
+	file := c.Args().First()
+	if file == "" {
+		file = ".woodpecker.yml"
+	}
+
+	fi, err := os.Stat(file)
+	if err != nil {
+		return err
+	}
+	if !fi.IsDir() {
+		return lintFile(file)
+	}
+
+	return filepath.Walk(file, func(path string, info os.FileInfo, e error) error {
+		if e != nil {
+			return e
+		}
+
+		// check if it is a regular file (not dir)
+		if info.Mode().IsRegular() && strings.HasSuffix(info.Name(), ".yml") {
+			fmt.Println("#", info.Name())
+			lintFile(path)
+			fmt.Println("")
+			return nil
+		}
+
+		return nil
+	})
+}
+
+func lintFile(file string) error {
+	err, configErrors := schema.Lint(file)
+	if err != nil {
+		fmt.Println("❌ Config is invalid")
+		for _, configError := range configErrors {
+			fmt.Println("In", configError.Field()+":", configError.Description())
+		}
+		return err
+	}
+
+	fmt.Println("✅ Config is valid")
+	return nil
+}

cmd/cli/main.go

@@ -8,6 +8,7 @@ import (
 	"github.com/woodpecker-ci/woodpecker/cli/deploy"
 	"github.com/woodpecker-ci/woodpecker/cli/exec"
 	"github.com/woodpecker-ci/woodpecker/cli/info"
+	"github.com/woodpecker-ci/woodpecker/cli/lint"
 	"github.com/woodpecker-ci/woodpecker/cli/log"
 	"github.com/woodpecker-ci/woodpecker/cli/registry"
 	"github.com/woodpecker-ci/woodpecker/cli/repo"
@@ -66,6 +67,7 @@ func main() {
 		secret.Command,
 		repo.Command,
 		user.Command,
+		lint.Command,
 	}
 
 	if err := app.Run(os.Args); err != nil {

go.mod

@@ -53,6 +53,7 @@ require (
 	github.com/urfave/cli v1.22.4
 	github.com/woodpecker-ci/expr v0.0.0-20210628233344-164b8b3d0915
 	github.com/woodpecker-ci/togo v0.0.0-20180401185031-50a0e4726e74
+	github.com/xeipuuv/gojsonschema v1.2.0
 	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
 	golang.org/x/net v0.0.0-20210825183410-e898025ed96a
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d

go.sum

@@ -697,9 +697,13 @@ github.com/woodpecker-ci/expr v0.0.0-20210628233344-164b8b3d0915 h1:9zBOoKSR9CBe
 github.com/woodpecker-ci/expr v0.0.0-20210628233344-164b8b3d0915/go.mod h1:PbzlZ93HrA1cf16OUP1vckAPq57gtF+ccnwZeDkmC9s=
 github.com/woodpecker-ci/togo v0.0.0-20180401185031-50a0e4726e74 h1:q/tWgA3hMWrAQqsS4yfhc0+w4RevBGr9ghem/bFFDRY=
 github.com/woodpecker-ci/togo v0.0.0-20180401185031-50a0e4726e74/go.mod h1:lykh/ei/caPO6sv4NN+pqnDTo8kEKhZcnhafN8GhGNs=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f h1:J9EGpcZtP0E/raorCMxlFGSTBrsSlaDGf3jU/qvAE2c=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
 github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
 github.com/xeipuuv/gojsonschema v0.0.0-20180618132009-1d523034197f/go.mod h1:5yf86TLmAcydyeJq5YvxkGPE2fm/u4myDekKRoLuqhs=
+github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
+github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=

pipeline/schema/.woodpecker/test-branches-array.yml

@@ -0,0 +1,7 @@
+branches: [master, pages]
+
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go test

pipeline/schema/.woodpecker/test-branches-exclude-include.yml

@@ -0,0 +1,9 @@
+branches:
+  include: master
+  exclude: [ develop, feature/* ]
+
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go test

pipeline/schema/.woodpecker/test-branches.yml

@@ -0,0 +1,7 @@
+branches: master
+
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go test

pipeline/schema/.woodpecker/test-broken.yml

@@ -0,0 +1,15 @@
+branches: master
+
+matri:
+  GO_VERSION:
+    - 1.14
+    - 1.13
+
+pipeline:
+  test:
+    image: golang:${GO_VERSION}
+    commands:
+      - echo "test ${DATABAS}"
+
+  build:
+    commands: go build

pipeline/schema/.woodpecker/test-clone-skip.yml

@@ -0,0 +1,7 @@
+pipeline:
+  test:
+    image: alpine
+    commands:
+      - echo "test"
+
+skip_clone: true

pipeline/schema/.woodpecker/test-clone.yml

@@ -0,0 +1,14 @@
+clone:
+  git:
+    image: plugins/git:next
+    depth: 50
+    path: bitbucket.org/foo/bar
+    recursive: true
+    submodule_override:
+      my-module: https://github.com/octocat/my-module.git
+
+pipeline:
+  test:
+    image: alpine
+    commands:
+      - echo "test"

pipeline/schema/.woodpecker/test-matrix.yml

@@ -0,0 +1,14 @@
+pipeline:
+  test:
+    image: golang:${GO_VERSION}
+    commands:
+      - echo "test ${DATABASE}"
+
+matrix:
+  GO_VERSION:
+    - 1.4
+    - 1.3
+  DATABASE:
+    - mysql:5.5
+    - mysql:6.5
+    - mariadb:10.1

pipeline/schema/.woodpecker/test-multi.yml

@@ -0,0 +1,10 @@
+pipeline:
+  deploy:
+    image: golang
+    commands:
+      - go test
+
+depends_on:
+  - lint
+  - build
+  - test

pipeline/schema/.woodpecker/test-plugin.yml

@@ -0,0 +1,15 @@
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go build
+      - go test
+
+  publish:
+    image: plugins/docker
+    repo: foo/bar
+    tags: latest
+
+  notify:
+    image: plugins/slack
+    channel: dev

pipeline/schema/.woodpecker/test-run-on.yml

@@ -0,0 +1,7 @@
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go test
+
+run_on: [ success, failure ]

pipeline/schema/.woodpecker/test-service.yml

@@ -0,0 +1,12 @@
+pipeline:
+  build:
+    image: golang
+    commands:
+      - go build
+      - go test
+
+services:
+  database:
+    image: mysql
+  cache:
+    image: redis

pipeline/schema/.woodpecker/test-step.yml

@@ -0,0 +1,57 @@
+pipeline:
+  image:
+    image: golang
+    commands:
+      - go test
+
+  image-pull:
+    image: golang
+    pull: true
+    commands:
+      - go test
+
+  single-command:
+    image: golang
+    commands: go test
+
+  commands:
+    image: golang
+    commands:
+      - go get
+      - go test
+
+  environment:
+    image: golang
+    environment:
+      - CGO=0
+      - GOOS=linux
+      - GOARCH=amd64
+    commands:
+      - go test
+
+  secrets:
+    image: docker
+    commands:
+     - echo $DOCKER_USERNAME
+     - echo $DOCKER_PASSWORD
+    secrets:
+      - docker_username
+      - source: docker_prod_password
+        target: docker_password
+
+  group:
+    group: test
+    image: golang
+    commands:
+      - go test
+
+  detached:
+    image: redis
+    detach: true
+
+  volume:
+    image: docker
+    commands:
+      - docker build --rm -t octocat/hello-world .
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock

pipeline/schema/.woodpecker/test-when.yml

@@ -0,0 +1,90 @@
+pipeline:
+  when-branch:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      branch: master
+
+  when-event:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      event: push
+
+  when-event-array:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      event: [push, pull_request, tag, deployment]
+
+  when-tag:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      tag: "v**"
+
+  when-status:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      status: [success, failure]
+
+  when-plattform:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      plattform: linux/amd64
+
+  when-plattform-array:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      plattform: [ linux/*, windows/amd64 ]
+
+  when-environment:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      environment: production
+      event: deployment
+
+  when-matrix:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      matrix:
+        GO_VERSION: 1.5
+        REDIS_VERSION: 2.8
+
+  when-instance:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      instance: stage.woodpecker.company.com
+
+  when-path:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      path: "folder/**"
+
+  when-path-include-exclude:
+    image: alpine
+    commands:
+      - echo "test"
+    when:
+      path:
+        include: [ '.woodpecker/*.yml', '*.ini' ]
+        exclude: [ '*.md', 'docs/**' ]
+        ignore_message: "[ALL]"

pipeline/schema/.woodpecker/test-workspace.yml

@@ -0,0 +1,9 @@
+workspace:
+  base: /go
+  path: src/github.com/octocat/hello-world
+
+pipeline:
+  build:
+    image: golang:latest
+    commands:
+      - go test

pipeline/schema/schema.go

@@ -0,0 +1,32 @@
+package schema
+
+import (
+	_ "embed"
+	"fmt"
+
+	"github.com/woodpecker-ci/woodpecker/shared/yml"
+	"github.com/xeipuuv/gojsonschema"
+)
+
+//go:embed schema.json
+var schemaDefinition []byte
+
+func Lint(file string) (error, []gojsonschema.ResultError) {
+	schemaLoader := gojsonschema.NewBytesLoader(schemaDefinition)
+	j, err := yml.LoadYmlFileAsJson(file)
+	if err != nil {
+		return fmt.Errorf("Failed to load yml file %w", err), nil
+	}
+
+	documentLoader := gojsonschema.NewBytesLoader(j)
+	result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+	if err != nil {
+		return fmt.Errorf("Validation failed %w", err), nil
+	}
+
+	if !result.Valid() {
+		return fmt.Errorf("Config not valid"), result.Errors()
+	}
+
+	return nil, nil
+}

pipeline/schema/schema.json

@@ -0,0 +1,285 @@
+{
+  "title": "Woodpecker CI configuration file",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://woodpecker-ci.github.io/schema/woodpecker.json",
+  "description": "Schema of a Woodpecker pipeline file. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax",
+  "type": "object",
+  "required": ["pipeline"],
+  "additionalProperties": false,
+  "properties": {
+    "$schema": {
+      "type": "string",
+      "format": "uri"
+    },
+    "clone": { "$ref": "#/definitions/clone" },
+    "branches": { "$ref": "#/definitions/branches" },
+    "pipeline": { "$ref": "#/definitions/pipeline" },
+    "services": { "$ref": "#/definitions/services" },
+    "workspace": { "$ref": "#/definitions/workspace" },
+    "matrix": { "$ref": "#/definitions/matrix" },
+    "skip_clone": { "type": "boolean" },
+    "depends_on": {
+      "type": "array",
+      "minLength": 1,
+      "items": { "type": "string" }
+    },
+    "run_on": {
+      "type": "array",
+      "minLength": 1,
+      "items": { "type": "string" }
+    }
+  },
+  "definitions": {
+    "clone": {
+      "description": "Configures the clone step. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#clone",
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "git": {
+          "type": "object",
+          "properties": {
+            "image": {
+              "type": "string"
+            }
+          }
+        }
+      }
+    },
+    "branches": {
+      "description": "Only include commits based on their target branch. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#branches",
+      "oneOf": [
+        {
+          "type": "array",
+          "items": {
+            "type": "string"
+          },
+          "minProperties": 1
+        },
+        {
+          "type": "string"
+        },
+        {
+          "type": "object",
+          "additionalProperties": false,
+          "properties": {
+            "exclude": {
+              "oneOf": [
+                {
+                  "type": "array",
+                  "items": { "type": "string" },
+                  "minLength": 1
+                },
+                { "type": "string" }
+              ]
+            },
+            "include": {
+              "oneOf": [
+                {
+                  "type": "array",
+                  "items": { "type": "string" },
+                  "minLength": 1
+                },
+                { "type": "string" }
+              ]
+            }
+          }
+        }
+      ]
+    },
+    "pipeline": {
+      "description": "The pipeline section defines a list of steps which will be executed serially, in the order in which they are defined. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax",
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/step"
+      },
+      "minProperties": 1
+    },
+    "step": {
+      "description": "Every step of your pipeline executes arbitrary commands inside a specified docker container. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#steps",
+      "type": "object",
+      "additionalProperties": true,
+      "required": ["image"],
+      "properties": {
+        "image": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#step-image",
+          "type": "string"
+        },
+        "pull": {
+          "description": "Always pull the latest image on pipeline execution Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#step-image",
+          "type": "boolean"
+        },
+        "commands": {
+          "description": "Commands of every pipeline step are executed serially as if you would enter them into your local shell. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#step-commands",
+          "oneOf": [
+            {
+              "type": "array",
+              "items": { "type": "string" },
+              "minLength": 1
+            },
+            { "type": "string" }
+          ]
+        },
+        "environment": {
+          "description": "Pass environment variables to a pipeline step. Read more: https://woodpecker-ci.github.io/docs/usage/environment",
+          "type": "array",
+          "items": { "type": "string" },
+          "minLength": 1
+        },
+        "secrets": {
+          "description": "Pass secrets to a pipeline step at runtime. Read more: https://woodpecker-ci.github.io/docs/usage/secrets",
+          "type": "array",
+          "items": {
+            "oneOf": [
+              { "type": "string" },
+              {
+                "type": "object",
+                "required": ["source", "target"],
+                "properties": {
+                  "source": { "type": "string" },
+                  "target": { "type": "string" }
+                }
+              }
+            ]
+          },
+          "minLength": 1
+        },
+        "when": {
+          "$ref": "#/definitions/step_when"
+        },
+        "group": {
+          "description": "Execute multiple steps with the same group key in parallel. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#step-group---parallel-execution",
+          "type": "string"
+        },
+        "volumes": {
+          "description": "Mount files or folders from the host machine into your step container. Read more: https://woodpecker-ci.github.io/docs/usage/volumes",
+          "oneOf": [
+            { "type": "string" },
+            { "type": "array", "items": { "type": "string" }, "minLength": 1 }
+          ]
+        }
+      }
+    },
+    "step_when": {
+      "description": "Steps can be skipped based on conditions. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#step-when---conditional-execution",
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "branch": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#branch",
+          "type": "string"
+        },
+        "event": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#event",
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "enum": ["push", "pull_request", "tag", "deployment"]
+              },
+              "minLength": 1
+            },
+            {
+              "enum": ["push", "pull_request", "tag", "deployment"]
+            }
+          ]
+        },
+        "tag": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#tag",
+          "type": "string"
+        },
+        "status": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#status",
+          "type": "array",
+          "items": {
+            "enum": ["success", "failure"]
+          }
+        },
+        "plattform": {
+          "description": "Execute a step only on a specific platform. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#plattform",
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "string"
+              },
+              "minLength": 1
+            },
+            { "type": "string" }
+          ]
+        },
+        "environment": {
+          "description": "Execute a step only for a specific environment. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#environment",
+          "type": "string"
+        },
+        "matrix": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#matrix",
+          "type": "object",
+          "additionalProperties": {
+            "type": ["boolean", "string", "number"]
+          }
+        },
+        "instance": {
+          "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#instance",
+          "type": "string"
+        },
+        "path": {
+          "description": "Execute a step only on commit with certain files added/removed/modified. Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#environment",
+          "oneOf": [
+            { "type": "string" },
+            {
+              "type": "object",
+              "properties": {
+                "include": {
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "exclude": {
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "ignore_message": {
+                  "type": "string"
+                }
+              },
+              "additionalProperties": false
+            }
+          ]
+        }
+      }
+    },
+    "services": {
+      "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/services",
+      "type": "object",
+      "additionalProperties": true
+    },
+    "workspace": {
+      "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/pipeline-syntax#workspace",
+      "type": "object",
+      "additionalProperties": true
+    },
+    "matrix": {
+      "description": "TODO Read more: https://woodpecker-ci.github.io/docs/usage/matrix-builds",
+      "type": "object",
+      "properties": {
+        "include": {
+          "type": "array",
+          "items": {
+            "type": "object"
+          },
+          "minLength": 1
+        }
+      },
+      "additionalProperties": {
+        "type": "array",
+        "items": {
+          "type": ["boolean", "string", "number"]
+        },
+        "minLength": 1
+      }
+    }
+  }
+}

pipeline/schema/schema_test.go

@@ -0,0 +1,91 @@
+package schema_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/woodpecker-ci/woodpecker/pipeline/schema"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSchema(t *testing.T) {
+	t.Parallel()
+
+	testTable := []struct {
+		name     string
+		testFile string
+		fail     bool
+	}{
+		{
+			name:     "Branches",
+			testFile: ".woodpecker/test-branches.yml",
+		},
+		{
+			name:     "Branches Array",
+			testFile: ".woodpecker/test-branches-array.yml",
+		},
+		{
+			name:     "Branches exclude & include",
+			testFile: ".woodpecker/test-branches-exclude-include.yml",
+		},
+		{
+			name:     "Clone",
+			testFile: ".woodpecker/test-clone.yml",
+		},
+		{
+			name:     "Clone skip",
+			testFile: ".woodpecker/test-clone-skip.yml",
+		},
+		{
+			name:     "Matrix",
+			testFile: ".woodpecker/test-matrix.yml",
+		},
+		{
+			name:     "Multi Pipeline",
+			testFile: ".woodpecker/test-multi.yml",
+		},
+		{
+			name:     "Plugin",
+			testFile: ".woodpecker/test-plugin.yml",
+		},
+		{
+			name:     "Run on",
+			testFile: ".woodpecker/test-run-on.yml",
+		},
+		{
+			name:     "Service",
+			testFile: ".woodpecker/test-service.yml",
+		},
+		{
+			name:     "Step",
+			testFile: ".woodpecker/test-step.yml",
+		},
+		{
+			name:     "When",
+			testFile: ".woodpecker/test-when.yml",
+		},
+		{
+			name:     "Workspace",
+			testFile: ".woodpecker/test-workspace.yml",
+		},
+		{
+			name:     "Broken Config",
+			testFile: ".woodpecker/test-broken.yml",
+			fail:     true,
+		},
+	}
+
+	for _, tt := range testTable {
+		t.Run(tt.name, func(t *testing.T) {
+			err, configErrors := schema.Lint(tt.testFile)
+			if tt.fail {
+				if len(configErrors) == 0 {
+					assert.Error(t, err, "Expected config errors but got none")
+				}
+			} else {
+				assert.NoError(t, err, fmt.Sprintf("Validation failed: %v", configErrors))
+			}
+		})
+	}
+}

shared/yml/yml.go

@@ -0,0 +1,71 @@
+package yml
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Source: https://github.com/icza/dyno/blob/f1bafe5d99965c48cc9d5c7cf024eeb495facc1e/dyno.go#L563-L601
+// License: Apache 2.0 - Copyright 2017 Andras Belicza
+// ConvertMapI2MapS walks the given dynamic object recursively, and
+// converts maps with interface{} key type to maps with string key type.
+// This function comes handy if you want to marshal a dynamic object into
+// JSON where maps with interface{} key type are not allowed.
+//
+// Recursion is implemented into values of the following types:
+//   -map[interface{}]interface{}
+//   -map[string]interface{}
+//   -[]interface{}
+//
+// When converting map[interface{}]interface{} to map[string]interface{},
+// fmt.Sprint() with default formatting is used to convert the key to a string key.
+func convertMapI2MapS(v interface{}) interface{} {
+	switch x := v.(type) {
+	case map[interface{}]interface{}:
+		m := map[string]interface{}{}
+		for k, v2 := range x {
+			switch k2 := k.(type) {
+			case string: // Fast check if it's already a string
+				m[k2] = convertMapI2MapS(v2)
+			default:
+				m[fmt.Sprint(k)] = convertMapI2MapS(v2)
+			}
+		}
+		v = m
+
+	case []interface{}:
+		for i, v2 := range x {
+			x[i] = convertMapI2MapS(v2)
+		}
+
+	case map[string]interface{}:
+		for k, v2 := range x {
+			x[k] = convertMapI2MapS(v2)
+		}
+	}
+
+	return v
+}
+
+func LoadYmlFileAsJson(path string) ([]byte, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	m := make(map[interface{}]interface{})
+	err = yaml.Unmarshal(data, &m)
+	if err != nil {
+		return nil, err
+	}
+
+	j, err := json.Marshal(convertMapI2MapS(m))
+	if err != nil {
+		return nil, err
+	}
+
+	return j, nil
+}

vendor/github.com/xeipuuv/gojsonpointer/LICENSE-APACHE-2.0.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2015 xeipuuv
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/xeipuuv/gojsonpointer/README.md

@@ -0,0 +1,41 @@
+# gojsonpointer
+An implementation of JSON Pointer - Go language
+
+## Usage
+	jsonText := `{
+		"name": "Bobby B",
+		"occupation": {
+			"title" : "King",
+			"years" : 15,
+			"heir" : "Joffrey B"			
+		}
+	}`
+	
+    var jsonDocument map[string]interface{}
+    json.Unmarshal([]byte(jsonText), &jsonDocument)
+    
+    //create a JSON pointer
+    pointerString := "/occupation/title"
+    pointer, _ := NewJsonPointer(pointerString)
+    
+    //SET a new value for the "title" in the document     
+    pointer.Set(jsonDocument, "Supreme Leader of Westeros")
+    
+    //GET the new "title" from the document
+    title, _, _ := pointer.Get(jsonDocument)
+    fmt.Println(title) //outputs "Supreme Leader of Westeros"
+    
+    //DELETE the "heir" from the document
+    deletePointer := NewJsonPointer("/occupation/heir")
+    deletePointer.Delete(jsonDocument)
+    
+    b, _ := json.Marshal(jsonDocument)
+    fmt.Println(string(b))
+    //outputs `{"name":"Bobby B","occupation":{"title":"Supreme Leader of Westeros","years":15}}`
+
+
+## References
+http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07
+
+### Note
+The 4.Evaluation part of the previous reference, starting with 'If the currently referenced value is a JSON array, the reference token MUST contain either...' is not implemented.

vendor/github.com/xeipuuv/gojsonpointer/pointer.go

@@ -0,0 +1,211 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author  			xeipuuv
+// author-github 	https://github.com/xeipuuv
+// author-mail		xeipuuv@gmail.com
+//
+// repository-name	gojsonpointer
+// repository-desc	An implementation of JSON Pointer - Go language
+//
+// description		Main and unique file.
+//
+// created      	25-02-2013
+
+package gojsonpointer
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+const (
+	const_empty_pointer     = ``
+	const_pointer_separator = `/`
+
+	const_invalid_start = `JSON pointer must be empty or start with a "` + const_pointer_separator + `"`
+)
+
+type implStruct struct {
+	mode string // "SET" or "GET"
+
+	inDocument interface{}
+
+	setInValue interface{}
+
+	getOutNode interface{}
+	getOutKind reflect.Kind
+	outError   error
+}
+
+type JsonPointer struct {
+	referenceTokens []string
+}
+
+// NewJsonPointer parses the given string JSON pointer and returns an object
+func NewJsonPointer(jsonPointerString string) (p JsonPointer, err error) {
+
+	// Pointer to the root of the document
+	if len(jsonPointerString) == 0 {
+		// Keep referenceTokens nil
+		return
+	}
+	if jsonPointerString[0] != '/' {
+		return p, errors.New(const_invalid_start)
+	}
+
+	p.referenceTokens = strings.Split(jsonPointerString[1:], const_pointer_separator)
+	return
+}
+
+// Uses the pointer to retrieve a value from a JSON document
+func (p *JsonPointer) Get(document interface{}) (interface{}, reflect.Kind, error) {
+
+	is := &implStruct{mode: "GET", inDocument: document}
+	p.implementation(is)
+	return is.getOutNode, is.getOutKind, is.outError
+
+}
+
+// Uses the pointer to update a value from a JSON document
+func (p *JsonPointer) Set(document interface{}, value interface{}) (interface{}, error) {
+
+	is := &implStruct{mode: "SET", inDocument: document, setInValue: value}
+	p.implementation(is)
+	return document, is.outError
+
+}
+
+// Uses the pointer to delete a value from a JSON document
+func (p *JsonPointer) Delete(document interface{}) (interface{}, error) {
+	is := &implStruct{mode: "DEL", inDocument: document}
+	p.implementation(is)
+	return document, is.outError
+}
+
+// Both Get and Set functions use the same implementation to avoid code duplication
+func (p *JsonPointer) implementation(i *implStruct) {
+
+	kind := reflect.Invalid
+
+	// Full document when empty
+	if len(p.referenceTokens) == 0 {
+		i.getOutNode = i.inDocument
+		i.outError = nil
+		i.getOutKind = kind
+		i.outError = nil
+		return
+	}
+
+	node := i.inDocument
+
+	previousNodes := make([]interface{}, len(p.referenceTokens))
+	previousTokens := make([]string, len(p.referenceTokens))
+
+	for ti, token := range p.referenceTokens {
+
+		isLastToken := ti == len(p.referenceTokens)-1
+		previousNodes[ti] = node
+		previousTokens[ti] = token
+
+		switch v := node.(type) {
+
+		case map[string]interface{}:
+			decodedToken := decodeReferenceToken(token)
+			if _, ok := v[decodedToken]; ok {
+				node = v[decodedToken]
+				if isLastToken && i.mode == "SET" {
+					v[decodedToken] = i.setInValue
+				} else if isLastToken && i.mode =="DEL" {
+					delete(v,decodedToken)
+				}
+			} else if (isLastToken && i.mode == "SET") {
+				v[decodedToken] = i.setInValue
+			} else {
+				i.outError = fmt.Errorf("Object has no key '%s'", decodedToken)
+				i.getOutKind = reflect.Map
+				i.getOutNode = nil
+				return
+			}
+
+		case []interface{}:
+			tokenIndex, err := strconv.Atoi(token)
+			if err != nil {
+				i.outError = fmt.Errorf("Invalid array index '%s'", token)
+				i.getOutKind = reflect.Slice
+				i.getOutNode = nil
+				return
+			}
+			if tokenIndex < 0 || tokenIndex >= len(v) {
+				i.outError = fmt.Errorf("Out of bound array[0,%d] index '%d'", len(v), tokenIndex)
+				i.getOutKind = reflect.Slice
+				i.getOutNode = nil
+				return
+			}
+
+			node = v[tokenIndex]
+			if isLastToken && i.mode == "SET" {
+				v[tokenIndex] = i.setInValue
+			}  else if isLastToken && i.mode =="DEL" {
+				v[tokenIndex] = v[len(v)-1]
+				v[len(v)-1] = nil
+				v = v[:len(v)-1]
+				previousNodes[ti-1].(map[string]interface{})[previousTokens[ti-1]] = v
+			}
+
+		default:
+			i.outError = fmt.Errorf("Invalid token reference '%s'", token)
+			i.getOutKind = reflect.ValueOf(node).Kind()
+			i.getOutNode = nil
+			return
+		}
+
+	}
+
+	i.getOutNode = node
+	i.getOutKind = reflect.ValueOf(node).Kind()
+	i.outError = nil
+}
+
+// Pointer to string representation function
+func (p *JsonPointer) String() string {
+
+	if len(p.referenceTokens) == 0 {
+		return const_empty_pointer
+	}
+
+	pointerString := const_pointer_separator + strings.Join(p.referenceTokens, const_pointer_separator)
+
+	return pointerString
+}
+
+// Specific JSON pointer encoding here
+// ~0 => ~
+// ~1 => /
+// ... and vice versa
+
+func decodeReferenceToken(token string) string {
+	step1 := strings.Replace(token, `~1`, `/`, -1)
+	step2 := strings.Replace(step1, `~0`, `~`, -1)
+	return step2
+}
+
+func encodeReferenceToken(token string) string {
+	step1 := strings.Replace(token, `~`, `~0`, -1)
+	step2 := strings.Replace(step1, `/`, `~1`, -1)
+	return step2
+}

vendor/github.com/xeipuuv/gojsonreference/LICENSE-APACHE-2.0.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2015 xeipuuv
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/xeipuuv/gojsonreference/README.md

@@ -0,0 +1,10 @@
+# gojsonreference
+An implementation of JSON Reference - Go language
+
+## Dependencies
+https://github.com/xeipuuv/gojsonpointer
+
+## References
+http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07
+
+http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03

vendor/github.com/xeipuuv/gojsonreference/reference.go

@@ -0,0 +1,147 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author  			xeipuuv
+// author-github 	https://github.com/xeipuuv
+// author-mail		xeipuuv@gmail.com
+//
+// repository-name	gojsonreference
+// repository-desc	An implementation of JSON Reference - Go language
+//
+// description		Main and unique file.
+//
+// created      	26-02-2013
+
+package gojsonreference
+
+import (
+	"errors"
+	"net/url"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/xeipuuv/gojsonpointer"
+)
+
+const (
+	const_fragment_char = `#`
+)
+
+func NewJsonReference(jsonReferenceString string) (JsonReference, error) {
+
+	var r JsonReference
+	err := r.parse(jsonReferenceString)
+	return r, err
+
+}
+
+type JsonReference struct {
+	referenceUrl     *url.URL
+	referencePointer gojsonpointer.JsonPointer
+
+	HasFullUrl      bool
+	HasUrlPathOnly  bool
+	HasFragmentOnly bool
+	HasFileScheme   bool
+	HasFullFilePath bool
+}
+
+func (r *JsonReference) GetUrl() *url.URL {
+	return r.referenceUrl
+}
+
+func (r *JsonReference) GetPointer() *gojsonpointer.JsonPointer {
+	return &r.referencePointer
+}
+
+func (r *JsonReference) String() string {
+
+	if r.referenceUrl != nil {
+		return r.referenceUrl.String()
+	}
+
+	if r.HasFragmentOnly {
+		return const_fragment_char + r.referencePointer.String()
+	}
+
+	return r.referencePointer.String()
+}
+
+func (r *JsonReference) IsCanonical() bool {
+	return (r.HasFileScheme && r.HasFullFilePath) || (!r.HasFileScheme && r.HasFullUrl)
+}
+
+// "Constructor", parses the given string JSON reference
+func (r *JsonReference) parse(jsonReferenceString string) (err error) {
+
+	r.referenceUrl, err = url.Parse(jsonReferenceString)
+	if err != nil {
+		return
+	}
+	refUrl := r.referenceUrl
+
+	if refUrl.Scheme != "" && refUrl.Host != "" {
+		r.HasFullUrl = true
+	} else {
+		if refUrl.Path != "" {
+			r.HasUrlPathOnly = true
+		} else if refUrl.RawQuery == "" && refUrl.Fragment != "" {
+			r.HasFragmentOnly = true
+		}
+	}
+
+	r.HasFileScheme = refUrl.Scheme == "file"
+	if runtime.GOOS == "windows" {
+		// on Windows, a file URL may have an extra leading slash, and if it
+		// doesn't then its first component will be treated as the host by the
+		// Go runtime
+		if refUrl.Host == "" && strings.HasPrefix(refUrl.Path, "/") {
+			r.HasFullFilePath = filepath.IsAbs(refUrl.Path[1:])
+		} else {
+			r.HasFullFilePath = filepath.IsAbs(refUrl.Host + refUrl.Path)
+		}
+	} else {
+		r.HasFullFilePath = filepath.IsAbs(refUrl.Path)
+	}
+
+	// invalid json-pointer error means url has no json-pointer fragment. simply ignore error
+	r.referencePointer, _ = gojsonpointer.NewJsonPointer(refUrl.Fragment)
+
+	return
+}
+
+// Creates a new reference from a parent and a child
+// If the child cannot inherit from the parent, an error is returned
+func (r *JsonReference) Inherits(child JsonReference) (*JsonReference, error) {
+	if child.GetUrl() == nil {
+		return nil, errors.New("childUrl is nil!")
+	}
+
+	if r.GetUrl() == nil {
+		return nil, errors.New("parentUrl is nil!")
+	}
+
+	// Get a copy of the parent url to make sure we do not modify the original.
+	// URL reference resolving fails if the fragment of the child is empty, but the parent's is not.
+	// The fragment of the child must be used, so the fragment of the parent is manually removed.
+	parentUrl := *r.GetUrl()
+	parentUrl.Fragment = ""
+
+	ref, err := NewJsonReference(parentUrl.ResolveReference(child.GetUrl()).String())
+	if err != nil {
+		return nil, err
+	}
+	return &ref, err
+}

vendor/github.com/xeipuuv/gojsonschema/.gitignore

@@ -0,0 +1,3 @@
+*.sw[nop]
+*.iml
+.vscode/

vendor/github.com/xeipuuv/gojsonschema/.travis.yml

@@ -0,0 +1,9 @@
+language: go
+go:
+  - "1.11"
+  - "1.12"
+  - "1.13"
+before_install:
+  - go get github.com/xeipuuv/gojsonreference
+  - go get github.com/xeipuuv/gojsonpointer
+  - go get github.com/stretchr/testify/assert

vendor/github.com/xeipuuv/gojsonschema/LICENSE-APACHE-2.0.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2015 xeipuuv
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/xeipuuv/gojsonschema/README.md

@@ -0,0 +1,466 @@
+[![GoDoc](https://godoc.org/github.com/xeipuuv/gojsonschema?status.svg)](https://godoc.org/github.com/xeipuuv/gojsonschema)
+[![Build Status](https://travis-ci.org/xeipuuv/gojsonschema.svg)](https://travis-ci.org/xeipuuv/gojsonschema)
+[![Go Report Card](https://goreportcard.com/badge/github.com/xeipuuv/gojsonschema)](https://goreportcard.com/report/github.com/xeipuuv/gojsonschema)
+
+# gojsonschema
+
+## Description
+
+An implementation of JSON Schema for the Go  programming language. Supports draft-04, draft-06 and draft-07.
+
+References :
+
+* http://json-schema.org
+* http://json-schema.org/latest/json-schema-core.html
+* http://json-schema.org/latest/json-schema-validation.html
+
+## Installation
+
+```
+go get github.com/xeipuuv/gojsonschema
+```
+
+Dependencies :
+* [github.com/xeipuuv/gojsonpointer](https://github.com/xeipuuv/gojsonpointer)
+* [github.com/xeipuuv/gojsonreference](https://github.com/xeipuuv/gojsonreference)
+* [github.com/stretchr/testify/assert](https://github.com/stretchr/testify#assert-package)
+
+## Usage
+
+### Example
+
+```go
+
+package main
+
+import (
+    "fmt"
+    "github.com/xeipuuv/gojsonschema"
+)
+
+func main() {
+
+    schemaLoader := gojsonschema.NewReferenceLoader("file:///home/me/schema.json")
+    documentLoader := gojsonschema.NewReferenceLoader("file:///home/me/document.json")
+
+    result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+    if err != nil {
+        panic(err.Error())
+    }
+
+    if result.Valid() {
+        fmt.Printf("The document is valid\n")
+    } else {
+        fmt.Printf("The document is not valid. see errors :\n")
+        for _, desc := range result.Errors() {
+            fmt.Printf("- %s\n", desc)
+        }
+    }
+}
+
+
+```
+
+#### Loaders
+
+There are various ways to load your JSON data.
+In order to load your schemas and documents,
+first declare an appropriate loader :
+
+* Web / HTTP, using a reference :
+
+```go
+loader := gojsonschema.NewReferenceLoader("http://www.some_host.com/schema.json")
+```
+
+* Local file, using a reference :
+
+```go
+loader := gojsonschema.NewReferenceLoader("file:///home/me/schema.json")
+```
+
+References use the URI scheme, the prefix (file://) and a full path to the file are required.
+
+* JSON strings :
+
+```go
+loader := gojsonschema.NewStringLoader(`{"type": "string"}`)
+```
+
+* Custom Go types :
+
+```go
+m := map[string]interface{}{"type": "string"}
+loader := gojsonschema.NewGoLoader(m)
+```
+
+And
+
+```go
+type Root struct {
+	Users []User `json:"users"`
+}
+
+type User struct {
+	Name string `json:"name"`
+}
+
+...
+
+data := Root{}
+data.Users = append(data.Users, User{"John"})
+data.Users = append(data.Users, User{"Sophia"})
+data.Users = append(data.Users, User{"Bill"})
+
+loader := gojsonschema.NewGoLoader(data)
+```
+
+#### Validation
+
+Once the loaders are set, validation is easy :
+
+```go
+result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+```
+
+Alternatively, you might want to load a schema only once and process to multiple validations :
+
+```go
+schema, err := gojsonschema.NewSchema(schemaLoader)
+...
+result1, err := schema.Validate(documentLoader1)
+...
+result2, err := schema.Validate(documentLoader2)
+...
+// etc ...
+```
+
+To check the result :
+
+```go
+    if result.Valid() {
+    	fmt.Printf("The document is valid\n")
+    } else {
+        fmt.Printf("The document is not valid. see errors :\n")
+        for _, err := range result.Errors() {
+        	// Err implements the ResultError interface
+            fmt.Printf("- %s\n", err)
+        }
+    }
+```
+
+
+## Loading local schemas
+
+By default `file` and `http(s)` references to external schemas are loaded automatically via the file system or via http(s). An external schema can also be loaded using a `SchemaLoader`.
+
+```go
+	sl := gojsonschema.NewSchemaLoader()
+	loader1 := gojsonschema.NewStringLoader(`{ "type" : "string" }`)
+	err := sl.AddSchema("http://some_host.com/string.json", loader1)
+```
+
+Alternatively if your schema already has an `$id` you can use the `AddSchemas` function
+```go
+	loader2 := gojsonschema.NewStringLoader(`{
+			"$id" : "http://some_host.com/maxlength.json",
+			"maxLength" : 5
+		}`)
+	err = sl.AddSchemas(loader2)
+```
+
+The main schema should be passed to the `Compile` function. This main schema can then directly reference the added schemas without needing to download them.
+```go
+	loader3 := gojsonschema.NewStringLoader(`{
+		"$id" : "http://some_host.com/main.json",
+		"allOf" : [
+			{ "$ref" : "http://some_host.com/string.json" },
+			{ "$ref" : "http://some_host.com/maxlength.json" }
+		]
+	}`)
+
+	schema, err := sl.Compile(loader3)
+
+	documentLoader := gojsonschema.NewStringLoader(`"hello world"`)
+
+	result, err := schema.Validate(documentLoader)
+```
+
+It's also possible to pass a `ReferenceLoader` to the `Compile` function that references a loaded schema.
+
+```go
+err = sl.AddSchemas(loader3)
+schema, err := sl.Compile(gojsonschema.NewReferenceLoader("http://some_host.com/main.json"))
+``` 
+
+Schemas added by `AddSchema` and `AddSchemas` are only validated when the entire schema is compiled, unless meta-schema validation is used.
+
+## Using a specific draft
+By default `gojsonschema` will try to detect the draft of a schema by using the `$schema` keyword and parse it in a strict draft-04, draft-06 or draft-07 mode. If `$schema` is missing, or the draft version is not explicitely set, a hybrid mode is used which merges together functionality of all drafts into one mode.
+
+Autodectection can be turned off with the `AutoDetect` property. Specific draft versions can be specified with the `Draft` property.
+
+```go
+sl := gojsonschema.NewSchemaLoader()
+sl.Draft = gojsonschema.Draft7
+sl.AutoDetect = false
+```
+
+If autodetection is on (default), a draft-07 schema can savely reference draft-04 schemas and vice-versa, as long as `$schema` is specified in all schemas.
+
+## Meta-schema validation
+Schemas that are added using the `AddSchema`, `AddSchemas` and `Compile` can be validated against their meta-schema by setting the `Validate` property.
+
+The following example will produce an error as `multipleOf` must be a number. If `Validate` is off (default), this error is only returned at the `Compile` step. 
+
+```go
+sl := gojsonschema.NewSchemaLoader()
+sl.Validate = true
+err := sl.AddSchemas(gojsonschema.NewStringLoader(`{
+     $id" : "http://some_host.com/invalid.json",
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "multipleOf" : true
+}`))
+ ```
+``` 
+ ```
+
+Errors returned by meta-schema validation are more readable and contain more information, which helps significantly if you are developing a schema.
+
+Meta-schema validation also works with a custom `$schema`. In case `$schema` is missing, or `AutoDetect` is set to `false`, the meta-schema of the used draft is used.
+
+
+## Working with Errors
+
+The library handles string error codes which you can customize by creating your own gojsonschema.locale and setting it
+```go
+gojsonschema.Locale = YourCustomLocale{}
+```
+
+However, each error contains additional contextual information. 
+
+Newer versions of `gojsonschema` may have new additional errors, so code that uses a custom locale will need to be updated when this happens.
+
+**err.Type()**: *string* Returns the "type" of error that occurred. Note you can also type check. See below
+
+Note: An error of RequiredType has an err.Type() return value of "required"
+
+    "required": RequiredError
+    "invalid_type": InvalidTypeError
+    "number_any_of": NumberAnyOfError
+    "number_one_of": NumberOneOfError
+    "number_all_of": NumberAllOfError
+    "number_not": NumberNotError
+    "missing_dependency": MissingDependencyError
+    "internal": InternalError
+    "const": ConstEror
+    "enum": EnumError
+    "array_no_additional_items": ArrayNoAdditionalItemsError
+    "array_min_items": ArrayMinItemsError
+    "array_max_items": ArrayMaxItemsError
+    "unique": ItemsMustBeUniqueError
+    "contains" : ArrayContainsError
+    "array_min_properties": ArrayMinPropertiesError
+    "array_max_properties": ArrayMaxPropertiesError
+    "additional_property_not_allowed": AdditionalPropertyNotAllowedError
+    "invalid_property_pattern": InvalidPropertyPatternError
+    "invalid_property_name":  InvalidPropertyNameError
+    "string_gte": StringLengthGTEError
+    "string_lte": StringLengthLTEError
+    "pattern": DoesNotMatchPatternError
+    "multiple_of": MultipleOfError
+    "number_gte": NumberGTEError
+    "number_gt": NumberGTError
+    "number_lte": NumberLTEError
+    "number_lt": NumberLTError
+    "condition_then" : ConditionThenError
+    "condition_else" : ConditionElseError
+
+**err.Value()**: *interface{}* Returns the value given
+
+**err.Context()**: *gojsonschema.JsonContext* Returns the context. This has a String() method that will print something like this: (root).firstName
+
+**err.Field()**: *string* Returns the fieldname in the format firstName, or for embedded properties, person.firstName. This returns the same as the String() method on *err.Context()* but removes the (root). prefix.
+
+**err.Description()**: *string* The error description. This is based on the locale you are using. See the beginning of this section for overwriting the locale with a custom implementation.
+
+**err.DescriptionFormat()**: *string* The error description format. This is relevant if you are adding custom validation errors afterwards to the result.
+
+**err.Details()**: *gojsonschema.ErrorDetails* Returns a map[string]interface{} of additional error details specific to the error. For example, GTE errors will have a "min" value, LTE will have a "max" value. See errors.go for a full description of all the error details. Every error always contains a "field" key that holds the value of *err.Field()*
+
+Note in most cases, the err.Details() will be used to generate replacement strings in your locales, and not used directly. These strings follow the text/template format i.e.
+```
+{{.field}} must be greater than or equal to {{.min}}
+```
+
+The library allows you to specify custom template functions, should you require more complex error message handling.
+```go
+gojsonschema.ErrorTemplateFuncs = map[string]interface{}{
+	"allcaps": func(s string) string {
+		return strings.ToUpper(s)
+	},
+}
+```
+
+Given the above definition, you can use the custom function `"allcaps"` in your localization templates:
+```
+{{allcaps .field}} must be greater than or equal to {{.min}}
+```
+
+The above error message would then be rendered with the `field` value in capital letters. For example:
+```
+"PASSWORD must be greater than or equal to 8"
+```
+
+Learn more about what types of template functions you can use in `ErrorTemplateFuncs` by referring to Go's [text/template FuncMap](https://golang.org/pkg/text/template/#FuncMap) type.
+
+## Formats
+JSON Schema allows for optional "format" property to validate instances against well-known formats. gojsonschema ships with all of the formats defined in the spec that you can use like this:
+
+````json
+{"type": "string", "format": "email"}
+````
+
+Not all formats defined in draft-07 are available. Implemented formats are:
+
+* `date`
+* `time`
+* `date-time`
+* `hostname`. Subdomains that start with a number are also supported, but this means that it doesn't strictly follow [RFC1034](http://tools.ietf.org/html/rfc1034#section-3.5) and has the implication that ipv4 addresses are also recognized as valid hostnames.
+* `email`. Go's email parser deviates slightly from [RFC5322](https://tools.ietf.org/html/rfc5322). Includes unicode support.
+* `idn-email`. Same caveat as `email`.
+* `ipv4`
+* `ipv6`
+* `uri`. Includes unicode support.
+* `uri-reference`. Includes unicode support.
+* `iri`
+* `iri-reference`
+* `uri-template`
+* `uuid`
+* `regex`. Go uses the [RE2](https://github.com/google/re2/wiki/Syntax) engine and is not [ECMA262](http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf) compatible.
+* `json-pointer`
+* `relative-json-pointer`
+
+`email`, `uri` and `uri-reference` use the same validation code as their unicode counterparts `idn-email`, `iri` and `iri-reference`. If you rely on unicode support you should use the specific 
+unicode enabled formats for the sake of interoperability as other implementations might not support unicode in the regular formats.
+
+The validation code for `uri`, `idn-email` and their relatives use mostly standard library code.
+
+For repetitive or more complex formats, you can create custom format checkers and add them to gojsonschema like this:
+
+```go
+// Define the format checker
+type RoleFormatChecker struct {}
+
+// Ensure it meets the gojsonschema.FormatChecker interface
+func (f RoleFormatChecker) IsFormat(input interface{}) bool {
+
+    asString, ok := input.(string)
+    if ok == false {
+        return false
+    }
+
+    return strings.HasPrefix("ROLE_", asString)
+}
+
+// Add it to the library
+gojsonschema.FormatCheckers.Add("role", RoleFormatChecker{})
+````
+
+Now to use in your json schema:
+````json
+{"type": "string", "format": "role"}
+````
+
+Another example would be to check if the provided integer matches an id on database:
+
+JSON schema:
+```json
+{"type": "integer", "format": "ValidUserId"}
+```
+
+```go
+// Define the format checker
+type ValidUserIdFormatChecker struct {}
+
+// Ensure it meets the gojsonschema.FormatChecker interface
+func (f ValidUserIdFormatChecker) IsFormat(input interface{}) bool {
+
+    asFloat64, ok := input.(float64) // Numbers are always float64 here
+    if ok == false {
+        return false
+    }
+
+    // XXX
+    // do the magic on the database looking for the int(asFloat64)
+
+    return true
+}
+
+// Add it to the library
+gojsonschema.FormatCheckers.Add("ValidUserId", ValidUserIdFormatChecker{})
+````
+
+Formats can also be removed, for example if you want to override one of the formats that is defined by default.
+
+```go
+gojsonschema.FormatCheckers.Remove("hostname")
+```
+
+
+## Additional custom validation
+After the validation has run and you have the results, you may add additional
+errors using `Result.AddError`. This is useful to maintain the same format within the resultset instead
+of having to add special exceptions for your own errors. Below is an example.
+
+```go
+type AnswerInvalidError struct {
+    gojsonschema.ResultErrorFields
+}
+
+func newAnswerInvalidError(context *gojsonschema.JsonContext, value interface{}, details gojsonschema.ErrorDetails) *AnswerInvalidError {
+    err := AnswerInvalidError{}
+    err.SetContext(context)
+    err.SetType("custom_invalid_error")
+    // it is important to use SetDescriptionFormat() as this is used to call SetDescription() after it has been parsed
+    // using the description of err will be overridden by this.
+    err.SetDescriptionFormat("Answer to the Ultimate Question of Life, the Universe, and Everything is {{.answer}}")
+    err.SetValue(value)
+    err.SetDetails(details)
+
+    return &err
+}
+
+func main() {
+    // ...
+    schema, err := gojsonschema.NewSchema(schemaLoader)
+    result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+
+    if true { // some validation
+        jsonContext := gojsonschema.NewJsonContext("question", nil)
+        errDetail := gojsonschema.ErrorDetails{
+            "answer": 42,
+        }
+        result.AddError(
+            newAnswerInvalidError(
+                gojsonschema.NewJsonContext("answer", jsonContext),
+                52,
+                errDetail,
+            ),
+            errDetail,
+        )
+    }
+
+    return result, err
+
+}
+```
+
+This is especially useful if you want to add validation beyond what the
+json schema drafts can provide such business specific logic.
+
+## Uses
+
+gojsonschema uses the following test suite :
+
+https://github.com/json-schema/JSON-Schema-Test-Suite

vendor/github.com/xeipuuv/gojsonschema/draft.go

@@ -0,0 +1,125 @@
+// Copyright 2018 johandorland ( https://github.com/johandorland )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gojsonschema
+
+import (
+	"errors"
+	"math"
+	"reflect"
+
+	"github.com/xeipuuv/gojsonreference"
+)
+
+// Draft is a JSON-schema draft version
+type Draft int
+
+// Supported Draft versions
+const (
+	Draft4 Draft = 4
+	Draft6 Draft = 6
+	Draft7 Draft = 7
+	Hybrid Draft = math.MaxInt32
+)
+
+type draftConfig struct {
+	Version       Draft
+	MetaSchemaURL string
+	MetaSchema    string
+}
+type draftConfigs []draftConfig
+
+var drafts draftConfigs
+
+func init() {
+	drafts = []draftConfig{
+		{
+			Version:       Draft4,
+			MetaSchemaURL: "http://json-schema.org/draft-04/schema",
+			MetaSchema:    `{"id":"http://json-schema.org/draft-04/schema#","$schema":"http://json-schema.org/draft-04/schema#","description":"Core schema meta-schema","definitions":{"schemaArray":{"type":"array","minItems":1,"items":{"$ref":"#"}},"positiveInteger":{"type":"integer","minimum":0},"positiveIntegerDefault0":{"allOf":[{"$ref":"#/definitions/positiveInteger"},{"default":0}]},"simpleTypes":{"enum":["array","boolean","integer","null","number","object","string"]},"stringArray":{"type":"array","items":{"type":"string"},"minItems":1,"uniqueItems":true}},"type":"object","properties":{"id":{"type":"string"},"$schema":{"type":"string"},"title":{"type":"string"},"description":{"type":"string"},"default":{},"multipleOf":{"type":"number","minimum":0,"exclusiveMinimum":true},"maximum":{"type":"number"},"exclusiveMaximum":{"type":"boolean","default":false},"minimum":{"type":"number"},"exclusiveMinimum":{"type":"boolean","default":false},"maxLength":{"$ref":"#/definitions/positiveInteger"},"minLength":{"$ref":"#/definitions/positiveIntegerDefault0"},"pattern":{"type":"string","format":"regex"},"additionalItems":{"anyOf":[{"type":"boolean"},{"$ref":"#"}],"default":{}},"items":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/schemaArray"}],"default":{}},"maxItems":{"$ref":"#/definitions/positiveInteger"},"minItems":{"$ref":"#/definitions/positiveIntegerDefault0"},"uniqueItems":{"type":"boolean","default":false},"maxProperties":{"$ref":"#/definitions/positiveInteger"},"minProperties":{"$ref":"#/definitions/positiveIntegerDefault0"},"required":{"$ref":"#/definitions/stringArray"},"additionalProperties":{"anyOf":[{"type":"boolean"},{"$ref":"#"}],"default":{}},"definitions":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"properties":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"patternProperties":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"dependencies":{"type":"object","additionalProperties":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/stringArray"}]}},"enum":{"type":"array","minItems":1,"uniqueItems":true},"type":{"anyOf":[{"$ref":"#/definitions/simpleTypes"},{"type":"array","items":{"$ref":"#/definitions/simpleTypes"},"minItems":1,"uniqueItems":true}]},"format":{"type":"string"},"allOf":{"$ref":"#/definitions/schemaArray"},"anyOf":{"$ref":"#/definitions/schemaArray"},"oneOf":{"$ref":"#/definitions/schemaArray"},"not":{"$ref":"#"}},"dependencies":{"exclusiveMaximum":["maximum"],"exclusiveMinimum":["minimum"]},"default":{}}`,
+		},
+		{
+			Version:       Draft6,
+			MetaSchemaURL: "http://json-schema.org/draft-06/schema",
+			MetaSchema:    `{"$schema":"http://json-schema.org/draft-06/schema#","$id":"http://json-schema.org/draft-06/schema#","title":"Core schema meta-schema","definitions":{"schemaArray":{"type":"array","minItems":1,"items":{"$ref":"#"}},"nonNegativeInteger":{"type":"integer","minimum":0},"nonNegativeIntegerDefault0":{"allOf":[{"$ref":"#/definitions/nonNegativeInteger"},{"default":0}]},"simpleTypes":{"enum":["array","boolean","integer","null","number","object","string"]},"stringArray":{"type":"array","items":{"type":"string"},"uniqueItems":true,"default":[]}},"type":["object","boolean"],"properties":{"$id":{"type":"string","format":"uri-reference"},"$schema":{"type":"string","format":"uri"},"$ref":{"type":"string","format":"uri-reference"},"title":{"type":"string"},"description":{"type":"string"},"default":{},"examples":{"type":"array","items":{}},"multipleOf":{"type":"number","exclusiveMinimum":0},"maximum":{"type":"number"},"exclusiveMaximum":{"type":"number"},"minimum":{"type":"number"},"exclusiveMinimum":{"type":"number"},"maxLength":{"$ref":"#/definitions/nonNegativeInteger"},"minLength":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"pattern":{"type":"string","format":"regex"},"additionalItems":{"$ref":"#"},"items":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/schemaArray"}],"default":{}},"maxItems":{"$ref":"#/definitions/nonNegativeInteger"},"minItems":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"uniqueItems":{"type":"boolean","default":false},"contains":{"$ref":"#"},"maxProperties":{"$ref":"#/definitions/nonNegativeInteger"},"minProperties":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"required":{"$ref":"#/definitions/stringArray"},"additionalProperties":{"$ref":"#"},"definitions":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"properties":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"patternProperties":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"dependencies":{"type":"object","additionalProperties":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/stringArray"}]}},"propertyNames":{"$ref":"#"},"const":{},"enum":{"type":"array","minItems":1,"uniqueItems":true},"type":{"anyOf":[{"$ref":"#/definitions/simpleTypes"},{"type":"array","items":{"$ref":"#/definitions/simpleTypes"},"minItems":1,"uniqueItems":true}]},"format":{"type":"string"},"allOf":{"$ref":"#/definitions/schemaArray"},"anyOf":{"$ref":"#/definitions/schemaArray"},"oneOf":{"$ref":"#/definitions/schemaArray"},"not":{"$ref":"#"}},"default":{}}`,
+		},
+		{
+			Version:       Draft7,
+			MetaSchemaURL: "http://json-schema.org/draft-07/schema",
+			MetaSchema:    `{"$schema":"http://json-schema.org/draft-07/schema#","$id":"http://json-schema.org/draft-07/schema#","title":"Core schema meta-schema","definitions":{"schemaArray":{"type":"array","minItems":1,"items":{"$ref":"#"}},"nonNegativeInteger":{"type":"integer","minimum":0},"nonNegativeIntegerDefault0":{"allOf":[{"$ref":"#/definitions/nonNegativeInteger"},{"default":0}]},"simpleTypes":{"enum":["array","boolean","integer","null","number","object","string"]},"stringArray":{"type":"array","items":{"type":"string"},"uniqueItems":true,"default":[]}},"type":["object","boolean"],"properties":{"$id":{"type":"string","format":"uri-reference"},"$schema":{"type":"string","format":"uri"},"$ref":{"type":"string","format":"uri-reference"},"$comment":{"type":"string"},"title":{"type":"string"},"description":{"type":"string"},"default":true,"readOnly":{"type":"boolean","default":false},"examples":{"type":"array","items":true},"multipleOf":{"type":"number","exclusiveMinimum":0},"maximum":{"type":"number"},"exclusiveMaximum":{"type":"number"},"minimum":{"type":"number"},"exclusiveMinimum":{"type":"number"},"maxLength":{"$ref":"#/definitions/nonNegativeInteger"},"minLength":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"pattern":{"type":"string","format":"regex"},"additionalItems":{"$ref":"#"},"items":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/schemaArray"}],"default":true},"maxItems":{"$ref":"#/definitions/nonNegativeInteger"},"minItems":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"uniqueItems":{"type":"boolean","default":false},"contains":{"$ref":"#"},"maxProperties":{"$ref":"#/definitions/nonNegativeInteger"},"minProperties":{"$ref":"#/definitions/nonNegativeIntegerDefault0"},"required":{"$ref":"#/definitions/stringArray"},"additionalProperties":{"$ref":"#"},"definitions":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"properties":{"type":"object","additionalProperties":{"$ref":"#"},"default":{}},"patternProperties":{"type":"object","additionalProperties":{"$ref":"#"},"propertyNames":{"format":"regex"},"default":{}},"dependencies":{"type":"object","additionalProperties":{"anyOf":[{"$ref":"#"},{"$ref":"#/definitions/stringArray"}]}},"propertyNames":{"$ref":"#"},"const":true,"enum":{"type":"array","items":true,"minItems":1,"uniqueItems":true},"type":{"anyOf":[{"$ref":"#/definitions/simpleTypes"},{"type":"array","items":{"$ref":"#/definitions/simpleTypes"},"minItems":1,"uniqueItems":true}]},"format":{"type":"string"},"contentMediaType":{"type":"string"},"contentEncoding":{"type":"string"},"if":{"$ref":"#"},"then":{"$ref":"#"},"else":{"$ref":"#"},"allOf":{"$ref":"#/definitions/schemaArray"},"anyOf":{"$ref":"#/definitions/schemaArray"},"oneOf":{"$ref":"#/definitions/schemaArray"},"not":{"$ref":"#"}},"default":true}`,
+		},
+	}
+}
+
+func (dc draftConfigs) GetMetaSchema(url string) string {
+	for _, config := range dc {
+		if config.MetaSchemaURL == url {
+			return config.MetaSchema
+		}
+	}
+	return ""
+}
+func (dc draftConfigs) GetDraftVersion(url string) *Draft {
+	for _, config := range dc {
+		if config.MetaSchemaURL == url {
+			return &config.Version
+		}
+	}
+	return nil
+}
+func (dc draftConfigs) GetSchemaURL(draft Draft) string {
+	for _, config := range dc {
+		if config.Version == draft {
+			return config.MetaSchemaURL
+		}
+	}
+	return ""
+}
+
+func parseSchemaURL(documentNode interface{}) (string, *Draft, error) {
+
+	if isKind(documentNode, reflect.Bool) {
+		return "", nil, nil
+	}
+
+	if !isKind(documentNode, reflect.Map) {
+		return "", nil, errors.New("schema is invalid")
+	}
+
+	m := documentNode.(map[string]interface{})
+
+	if existsMapKey(m, KEY_SCHEMA) {
+		if !isKind(m[KEY_SCHEMA], reflect.String) {
+			return "", nil, errors.New(formatErrorDescription(
+				Locale.MustBeOfType(),
+				ErrorDetails{
+					"key":  KEY_SCHEMA,
+					"type": TYPE_STRING,
+				},
+			))
+		}
+
+		schemaReference, err := gojsonreference.NewJsonReference(m[KEY_SCHEMA].(string))
+
+		if err != nil {
+			return "", nil, err
+		}
+
+		schema := schemaReference.String()
+
+		return schema, drafts.GetDraftVersion(schema), nil
+	}
+
+	return "", nil, nil
+}

vendor/github.com/xeipuuv/gojsonschema/errors.go

@@ -0,0 +1,364 @@
+package gojsonschema
+
+import (
+	"bytes"
+	"sync"
+	"text/template"
+)
+
+var errorTemplates = errorTemplate{template.New("errors-new"), sync.RWMutex{}}
+
+// template.Template is not thread-safe for writing, so some locking is done
+// sync.RWMutex is used for efficiently locking when new templates are created
+type errorTemplate struct {
+	*template.Template
+	sync.RWMutex
+}
+
+type (
+
+	// FalseError. ErrorDetails: -
+	FalseError struct {
+		ResultErrorFields
+	}
+
+	// RequiredError indicates that a required field is missing
+	// ErrorDetails: property string
+	RequiredError struct {
+		ResultErrorFields
+	}
+
+	// InvalidTypeError indicates that a field has the incorrect type
+	// ErrorDetails: expected, given
+	InvalidTypeError struct {
+		ResultErrorFields
+	}
+
+	// NumberAnyOfError is produced in case of a failing "anyOf" validation
+	// ErrorDetails: -
+	NumberAnyOfError struct {
+		ResultErrorFields
+	}
+
+	// NumberOneOfError is produced in case of a failing "oneOf" validation
+	// ErrorDetails: -
+	NumberOneOfError struct {
+		ResultErrorFields
+	}
+
+	// NumberAllOfError is produced in case of a failing "allOf" validation
+	// ErrorDetails: -
+	NumberAllOfError struct {
+		ResultErrorFields
+	}
+
+	// NumberNotError is produced if a "not" validation failed
+	// ErrorDetails: -
+	NumberNotError struct {
+		ResultErrorFields
+	}
+
+	// MissingDependencyError is produced in case of a "missing dependency" problem
+	// ErrorDetails: dependency
+	MissingDependencyError struct {
+		ResultErrorFields
+	}
+
+	// InternalError indicates an internal error
+	// ErrorDetails: error
+	InternalError struct {
+		ResultErrorFields
+	}
+
+	// ConstError indicates a const error
+	// ErrorDetails: allowed
+	ConstError struct {
+		ResultErrorFields
+	}
+
+	// EnumError indicates an enum error
+	// ErrorDetails: allowed
+	EnumError struct {
+		ResultErrorFields
+	}
+
+	// ArrayNoAdditionalItemsError is produced if additional items were found, but not allowed
+	// ErrorDetails: -
+	ArrayNoAdditionalItemsError struct {
+		ResultErrorFields
+	}
+
+	// ArrayMinItemsError is produced if an array contains less items than the allowed minimum
+	// ErrorDetails: min
+	ArrayMinItemsError struct {
+		ResultErrorFields
+	}
+
+	// ArrayMaxItemsError is produced if an array contains more items than the allowed maximum
+	// ErrorDetails: max
+	ArrayMaxItemsError struct {
+		ResultErrorFields
+	}
+
+	// ItemsMustBeUniqueError is produced if an array requires unique items, but contains non-unique items
+	// ErrorDetails: type, i, j
+	ItemsMustBeUniqueError struct {
+		ResultErrorFields
+	}
+
+	// ArrayContainsError is produced if an array contains invalid items
+	// ErrorDetails:
+	ArrayContainsError struct {
+		ResultErrorFields
+	}
+
+	// ArrayMinPropertiesError is produced if an object contains less properties than the allowed minimum
+	// ErrorDetails: min
+	ArrayMinPropertiesError struct {
+		ResultErrorFields
+	}
+
+	// ArrayMaxPropertiesError is produced if an object contains more properties than the allowed maximum
+	// ErrorDetails: max
+	ArrayMaxPropertiesError struct {
+		ResultErrorFields
+	}
+
+	// AdditionalPropertyNotAllowedError is produced if an object has additional properties, but not allowed
+	// ErrorDetails: property
+	AdditionalPropertyNotAllowedError struct {
+		ResultErrorFields
+	}
+
+	// InvalidPropertyPatternError is produced if an pattern was found
+	// ErrorDetails: property, pattern
+	InvalidPropertyPatternError struct {
+		ResultErrorFields
+	}
+
+	// InvalidPropertyNameError is produced if an invalid-named property was found
+	// ErrorDetails: property
+	InvalidPropertyNameError struct {
+		ResultErrorFields
+	}
+
+	// StringLengthGTEError is produced if a string is shorter than the minimum required length
+	// ErrorDetails: min
+	StringLengthGTEError struct {
+		ResultErrorFields
+	}
+
+	// StringLengthLTEError is produced if a string is longer than the maximum allowed length
+	// ErrorDetails: max
+	StringLengthLTEError struct {
+		ResultErrorFields
+	}
+
+	// DoesNotMatchPatternError is produced if a string does not match the defined pattern
+	// ErrorDetails: pattern
+	DoesNotMatchPatternError struct {
+		ResultErrorFields
+	}
+
+	// DoesNotMatchFormatError is produced if a string does not match the defined format
+	// ErrorDetails: format
+	DoesNotMatchFormatError struct {
+		ResultErrorFields
+	}
+
+	// MultipleOfError is produced if a number is not a multiple of the defined multipleOf
+	// ErrorDetails: multiple
+	MultipleOfError struct {
+		ResultErrorFields
+	}
+
+	// NumberGTEError is produced if a number is lower than the allowed minimum
+	// ErrorDetails: min
+	NumberGTEError struct {
+		ResultErrorFields
+	}
+
+	// NumberGTError is produced if a number is lower than, or equal to the specified minimum, and exclusiveMinimum is set
+	// ErrorDetails: min
+	NumberGTError struct {
+		ResultErrorFields
+	}
+
+	// NumberLTEError is produced if a number is higher than the allowed maximum
+	// ErrorDetails: max
+	NumberLTEError struct {
+		ResultErrorFields
+	}
+
+	// NumberLTError is produced if a number is higher than, or equal to the specified maximum, and exclusiveMaximum is set
+	// ErrorDetails: max
+	NumberLTError struct {
+		ResultErrorFields
+	}
+
+	// ConditionThenError is produced if a condition's "then" validation is invalid
+	// ErrorDetails: -
+	ConditionThenError struct {
+		ResultErrorFields
+	}
+
+	// ConditionElseError is produced if a condition's "else" condition is invalid
+	// ErrorDetails: -
+	ConditionElseError struct {
+		ResultErrorFields
+	}
+)
+
+// newError takes a ResultError type and sets the type, context, description, details, value, and field
+func newError(err ResultError, context *JsonContext, value interface{}, locale locale, details ErrorDetails) {
+	var t string
+	var d string
+	switch err.(type) {
+	case *FalseError:
+		t = "false"
+		d = locale.False()
+	case *RequiredError:
+		t = "required"
+		d = locale.Required()
+	case *InvalidTypeError:
+		t = "invalid_type"
+		d = locale.InvalidType()
+	case *NumberAnyOfError:
+		t = "number_any_of"
+		d = locale.NumberAnyOf()
+	case *NumberOneOfError:
+		t = "number_one_of"
+		d = locale.NumberOneOf()
+	case *NumberAllOfError:
+		t = "number_all_of"
+		d = locale.NumberAllOf()
+	case *NumberNotError:
+		t = "number_not"
+		d = locale.NumberNot()
+	case *MissingDependencyError:
+		t = "missing_dependency"
+		d = locale.MissingDependency()
+	case *InternalError:
+		t = "internal"
+		d = locale.Internal()
+	case *ConstError:
+		t = "const"
+		d = locale.Const()
+	case *EnumError:
+		t = "enum"
+		d = locale.Enum()
+	case *ArrayNoAdditionalItemsError:
+		t = "array_no_additional_items"
+		d = locale.ArrayNoAdditionalItems()
+	case *ArrayMinItemsError:
+		t = "array_min_items"
+		d = locale.ArrayMinItems()
+	case *ArrayMaxItemsError:
+		t = "array_max_items"
+		d = locale.ArrayMaxItems()
+	case *ItemsMustBeUniqueError:
+		t = "unique"
+		d = locale.Unique()
+	case *ArrayContainsError:
+		t = "contains"
+		d = locale.ArrayContains()
+	case *ArrayMinPropertiesError:
+		t = "array_min_properties"
+		d = locale.ArrayMinProperties()
+	case *ArrayMaxPropertiesError:
+		t = "array_max_properties"
+		d = locale.ArrayMaxProperties()
+	case *AdditionalPropertyNotAllowedError:
+		t = "additional_property_not_allowed"
+		d = locale.AdditionalPropertyNotAllowed()
+	case *InvalidPropertyPatternError:
+		t = "invalid_property_pattern"
+		d = locale.InvalidPropertyPattern()
+	case *InvalidPropertyNameError:
+		t = "invalid_property_name"
+		d = locale.InvalidPropertyName()
+	case *StringLengthGTEError:
+		t = "string_gte"
+		d = locale.StringGTE()
+	case *StringLengthLTEError:
+		t = "string_lte"
+		d = locale.StringLTE()
+	case *DoesNotMatchPatternError:
+		t = "pattern"
+		d = locale.DoesNotMatchPattern()
+	case *DoesNotMatchFormatError:
+		t = "format"
+		d = locale.DoesNotMatchFormat()
+	case *MultipleOfError:
+		t = "multiple_of"
+		d = locale.MultipleOf()
+	case *NumberGTEError:
+		t = "number_gte"
+		d = locale.NumberGTE()
+	case *NumberGTError:
+		t = "number_gt"
+		d = locale.NumberGT()
+	case *NumberLTEError:
+		t = "number_lte"
+		d = locale.NumberLTE()
+	case *NumberLTError:
+		t = "number_lt"
+		d = locale.NumberLT()
+	case *ConditionThenError:
+		t = "condition_then"
+		d = locale.ConditionThen()
+	case *ConditionElseError:
+		t = "condition_else"
+		d = locale.ConditionElse()
+	}
+
+	err.SetType(t)
+	err.SetContext(context)
+	err.SetValue(value)
+	err.SetDetails(details)
+	err.SetDescriptionFormat(d)
+	details["field"] = err.Field()
+
+	if _, exists := details["context"]; !exists && context != nil {
+		details["context"] = context.String()
+	}
+
+	err.SetDescription(formatErrorDescription(err.DescriptionFormat(), details))
+}
+
+// formatErrorDescription takes a string in the default text/template
+// format and converts it to a string with replacements. The fields come
+// from the ErrorDetails struct and vary for each type of error.
+func formatErrorDescription(s string, details ErrorDetails) string {
+
+	var tpl *template.Template
+	var descrAsBuffer bytes.Buffer
+	var err error
+
+	errorTemplates.RLock()
+	tpl = errorTemplates.Lookup(s)
+	errorTemplates.RUnlock()
+
+	if tpl == nil {
+		errorTemplates.Lock()
+		tpl = errorTemplates.New(s)
+
+		if ErrorTemplateFuncs != nil {
+			tpl.Funcs(ErrorTemplateFuncs)
+		}
+
+		tpl, err = tpl.Parse(s)
+		errorTemplates.Unlock()
+
+		if err != nil {
+			return err.Error()
+		}
+	}
+
+	err = tpl.Execute(&descrAsBuffer, details)
+	if err != nil {
+		return err.Error()
+	}
+
+	return descrAsBuffer.String()
+}

vendor/github.com/xeipuuv/gojsonschema/format_checkers.go

@@ -0,0 +1,368 @@
+package gojsonschema
+
+import (
+	"net"
+	"net/mail"
+	"net/url"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+)
+
+type (
+	// FormatChecker is the interface all formatters added to FormatCheckerChain must implement
+	FormatChecker interface {
+		// IsFormat checks if input has the correct format and type
+		IsFormat(input interface{}) bool
+	}
+
+	// FormatCheckerChain holds the formatters
+	FormatCheckerChain struct {
+		formatters map[string]FormatChecker
+	}
+
+	// EmailFormatChecker verifies email address formats
+	EmailFormatChecker struct{}
+
+	// IPV4FormatChecker verifies IP addresses in the IPv4 format
+	IPV4FormatChecker struct{}
+
+	// IPV6FormatChecker verifies IP addresses in the IPv6 format
+	IPV6FormatChecker struct{}
+
+	// DateTimeFormatChecker verifies date/time formats per RFC3339 5.6
+	//
+	// Valid formats:
+	// 		Partial Time: HH:MM:SS
+	//		Full Date: YYYY-MM-DD
+	// 		Full Time: HH:MM:SSZ-07:00
+	//		Date Time: YYYY-MM-DDTHH:MM:SSZ-0700
+	//
+	// 	Where
+	//		YYYY = 4DIGIT year
+	//		MM = 2DIGIT month ; 01-12
+	//		DD = 2DIGIT day-month ; 01-28, 01-29, 01-30, 01-31 based on month/year
+	//		HH = 2DIGIT hour ; 00-23
+	//		MM = 2DIGIT ; 00-59
+	//		SS = 2DIGIT ; 00-58, 00-60 based on leap second rules
+	//		T = Literal
+	//		Z = Literal
+	//
+	//	Note: Nanoseconds are also suported in all formats
+	//
+	// http://tools.ietf.org/html/rfc3339#section-5.6
+	DateTimeFormatChecker struct{}
+
+	// DateFormatChecker verifies date formats
+	//
+	// Valid format:
+	//		Full Date: YYYY-MM-DD
+	//
+	// 	Where
+	//		YYYY = 4DIGIT year
+	//		MM = 2DIGIT month ; 01-12
+	//		DD = 2DIGIT day-month ; 01-28, 01-29, 01-30, 01-31 based on month/year
+	DateFormatChecker struct{}
+
+	// TimeFormatChecker verifies time formats
+	//
+	// Valid formats:
+	// 		Partial Time: HH:MM:SS
+	// 		Full Time: HH:MM:SSZ-07:00
+	//
+	// 	Where
+	//		HH = 2DIGIT hour ; 00-23
+	//		MM = 2DIGIT ; 00-59
+	//		SS = 2DIGIT ; 00-58, 00-60 based on leap second rules
+	//		T = Literal
+	//		Z = Literal
+	TimeFormatChecker struct{}
+
+	// URIFormatChecker validates a URI with a valid Scheme per RFC3986
+	URIFormatChecker struct{}
+
+	// URIReferenceFormatChecker validates a URI or relative-reference per RFC3986
+	URIReferenceFormatChecker struct{}
+
+	// URITemplateFormatChecker validates a URI template per RFC6570
+	URITemplateFormatChecker struct{}
+
+	// HostnameFormatChecker validates a hostname is in the correct format
+	HostnameFormatChecker struct{}
+
+	// UUIDFormatChecker validates a UUID is in the correct format
+	UUIDFormatChecker struct{}
+
+	// RegexFormatChecker validates a regex is in the correct format
+	RegexFormatChecker struct{}
+
+	// JSONPointerFormatChecker validates a JSON Pointer per RFC6901
+	JSONPointerFormatChecker struct{}
+
+	// RelativeJSONPointerFormatChecker validates a relative JSON Pointer is in the correct format
+	RelativeJSONPointerFormatChecker struct{}
+)
+
+var (
+	// FormatCheckers holds the valid formatters, and is a public variable
+	// so library users can add custom formatters
+	FormatCheckers = FormatCheckerChain{
+		formatters: map[string]FormatChecker{
+			"date":                  DateFormatChecker{},
+			"time":                  TimeFormatChecker{},
+			"date-time":             DateTimeFormatChecker{},
+			"hostname":              HostnameFormatChecker{},
+			"email":                 EmailFormatChecker{},
+			"idn-email":             EmailFormatChecker{},
+			"ipv4":                  IPV4FormatChecker{},
+			"ipv6":                  IPV6FormatChecker{},
+			"uri":                   URIFormatChecker{},
+			"uri-reference":         URIReferenceFormatChecker{},
+			"iri":                   URIFormatChecker{},
+			"iri-reference":         URIReferenceFormatChecker{},
+			"uri-template":          URITemplateFormatChecker{},
+			"uuid":                  UUIDFormatChecker{},
+			"regex":                 RegexFormatChecker{},
+			"json-pointer":          JSONPointerFormatChecker{},
+			"relative-json-pointer": RelativeJSONPointerFormatChecker{},
+		},
+	}
+
+	// Regex credit: https://www.socketloop.com/tutorials/golang-validate-hostname
+	rxHostname = regexp.MustCompile(`^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])(\.([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9]))*$`)
+
+	// Use a regex to make sure curly brackets are balanced properly after validating it as a AURI
+	rxURITemplate = regexp.MustCompile("^([^{]*({[^}]*})?)*$")
+
+	rxUUID = regexp.MustCompile("^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$")
+
+	rxJSONPointer = regexp.MustCompile("^(?:/(?:[^~/]|~0|~1)*)*$")
+
+	rxRelJSONPointer = regexp.MustCompile("^(?:0|[1-9][0-9]*)(?:#|(?:/(?:[^~/]|~0|~1)*)*)$")
+
+	lock = new(sync.RWMutex)
+)
+
+// Add adds a FormatChecker to the FormatCheckerChain
+// The name used will be the value used for the format key in your json schema
+func (c *FormatCheckerChain) Add(name string, f FormatChecker) *FormatCheckerChain {
+	lock.Lock()
+	c.formatters[name] = f
+	lock.Unlock()
+
+	return c
+}
+
+// Remove deletes a FormatChecker from the FormatCheckerChain (if it exists)
+func (c *FormatCheckerChain) Remove(name string) *FormatCheckerChain {
+	lock.Lock()
+	delete(c.formatters, name)
+	lock.Unlock()
+
+	return c
+}
+
+// Has checks to see if the FormatCheckerChain holds a FormatChecker with the given name
+func (c *FormatCheckerChain) Has(name string) bool {
+	lock.RLock()
+	_, ok := c.formatters[name]
+	lock.RUnlock()
+
+	return ok
+}
+
+// IsFormat will check an input against a FormatChecker with the given name
+// to see if it is the correct format
+func (c *FormatCheckerChain) IsFormat(name string, input interface{}) bool {
+	lock.RLock()
+	f, ok := c.formatters[name]
+	lock.RUnlock()
+
+	// If a format is unrecognized it should always pass validation
+	if !ok {
+		return true
+	}
+
+	return f.IsFormat(input)
+}
+
+// IsFormat checks if input is a correctly formatted e-mail address
+func (f EmailFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	_, err := mail.ParseAddress(asString)
+	return err == nil
+}
+
+// IsFormat checks if input is a correctly formatted IPv4-address
+func (f IPV4FormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	// Credit: https://github.com/asaskevich/govalidator
+	ip := net.ParseIP(asString)
+	return ip != nil && strings.Contains(asString, ".")
+}
+
+// IsFormat checks if input is a correctly formatted IPv6=address
+func (f IPV6FormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	// Credit: https://github.com/asaskevich/govalidator
+	ip := net.ParseIP(asString)
+	return ip != nil && strings.Contains(asString, ":")
+}
+
+// IsFormat checks if input is a correctly formatted  date/time per RFC3339 5.6
+func (f DateTimeFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	formats := []string{
+		"15:04:05",
+		"15:04:05Z07:00",
+		"2006-01-02",
+		time.RFC3339,
+		time.RFC3339Nano,
+	}
+
+	for _, format := range formats {
+		if _, err := time.Parse(format, asString); err == nil {
+			return true
+		}
+	}
+
+	return false
+}
+
+// IsFormat checks if input is a correctly formatted  date (YYYY-MM-DD)
+func (f DateFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+	_, err := time.Parse("2006-01-02", asString)
+	return err == nil
+}
+
+// IsFormat checks if input correctly formatted time (HH:MM:SS or HH:MM:SSZ-07:00)
+func (f TimeFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	if _, err := time.Parse("15:04:05Z07:00", asString); err == nil {
+		return true
+	}
+
+	_, err := time.Parse("15:04:05", asString)
+	return err == nil
+}
+
+// IsFormat checks if input is correctly formatted  URI with a valid Scheme per RFC3986
+func (f URIFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	u, err := url.Parse(asString)
+
+	if err != nil || u.Scheme == "" {
+		return false
+	}
+
+	return !strings.Contains(asString, `\`)
+}
+
+// IsFormat checks if input is a correctly formatted URI or relative-reference per RFC3986
+func (f URIReferenceFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	_, err := url.Parse(asString)
+	return err == nil && !strings.Contains(asString, `\`)
+}
+
+// IsFormat checks if input is a correctly formatted URI template per RFC6570
+func (f URITemplateFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	u, err := url.Parse(asString)
+	if err != nil || strings.Contains(asString, `\`) {
+		return false
+	}
+
+	return rxURITemplate.MatchString(u.Path)
+}
+
+// IsFormat checks if input is a correctly formatted hostname
+func (f HostnameFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	return rxHostname.MatchString(asString) && len(asString) < 256
+}
+
+// IsFormat checks if input is a correctly formatted UUID
+func (f UUIDFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	return rxUUID.MatchString(asString)
+}
+
+// IsFormat checks if input is a correctly formatted regular expression
+func (f RegexFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	if asString == "" {
+		return true
+	}
+	_, err := regexp.Compile(asString)
+	return err == nil
+}
+
+// IsFormat checks if input is a correctly formatted JSON Pointer per RFC6901
+func (f JSONPointerFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	return rxJSONPointer.MatchString(asString)
+}
+
+// IsFormat checks if input is a correctly formatted relative JSON Pointer
+func (f RelativeJSONPointerFormatChecker) IsFormat(input interface{}) bool {
+	asString, ok := input.(string)
+	if !ok {
+		return false
+	}
+
+	return rxRelJSONPointer.MatchString(asString)
+}

vendor/github.com/xeipuuv/gojsonschema/glide.yaml

@@ -0,0 +1,13 @@
+package: github.com/xeipuuv/gojsonschema
+license: Apache 2.0
+import:
+- package: github.com/xeipuuv/gojsonschema
+
+- package: github.com/xeipuuv/gojsonpointer
+
+- package: github.com/xeipuuv/gojsonreference
+
+testImport:
+- package: github.com/stretchr/testify
+  subpackages:
+  - assert

vendor/github.com/xeipuuv/gojsonschema/go.mod

@@ -0,0 +1,7 @@
+module github.com/xeipuuv/gojsonschema
+
+require (
+	github.com/stretchr/testify v1.3.0
+	github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415
+)

vendor/github.com/xeipuuv/gojsonschema/go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f h1:J9EGpcZtP0E/raorCMxlFGSTBrsSlaDGf3jU/qvAE2c=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=

vendor/github.com/xeipuuv/gojsonschema/internalLog.go

@@ -0,0 +1,37 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Very simple log wrapper.
+//					Used for debugging/testing purposes.
+//
+// created          01-01-2015
+
+package gojsonschema
+
+import (
+	"log"
+)
+
+const internalLogEnabled = false
+
+func internalLog(format string, v ...interface{}) {
+	log.Printf(format, v...)
+}

vendor/github.com/xeipuuv/gojsonschema/jsonContext.go

@@ -0,0 +1,73 @@
+// Copyright 2013 MongoDB, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           tolsen
+// author-github    https://github.com/tolsen
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Implements a persistent (immutable w/ shared structure) singly-linked list of strings for the purpose of storing a json context
+//
+// created          04-09-2013
+
+package gojsonschema
+
+import "bytes"
+
+// JsonContext implements a persistent linked-list of strings
+type JsonContext struct {
+	head string
+	tail *JsonContext
+}
+
+// NewJsonContext creates a new JsonContext
+func NewJsonContext(head string, tail *JsonContext) *JsonContext {
+	return &JsonContext{head, tail}
+}
+
+// String displays the context in reverse.
+// This plays well with the data structure's persistent nature with
+// Cons and a json document's tree structure.
+func (c *JsonContext) String(del ...string) string {
+	byteArr := make([]byte, 0, c.stringLen())
+	buf := bytes.NewBuffer(byteArr)
+	c.writeStringToBuffer(buf, del)
+
+	return buf.String()
+}
+
+func (c *JsonContext) stringLen() int {
+	length := 0
+	if c.tail != nil {
+		length = c.tail.stringLen() + 1 // add 1 for "."
+	}
+
+	length += len(c.head)
+	return length
+}
+
+func (c *JsonContext) writeStringToBuffer(buf *bytes.Buffer, del []string) {
+	if c.tail != nil {
+		c.tail.writeStringToBuffer(buf, del)
+
+		if len(del) > 0 {
+			buf.WriteString(del[0])
+		} else {
+			buf.WriteString(".")
+		}
+	}
+
+	buf.WriteString(c.head)
+}

vendor/github.com/xeipuuv/gojsonschema/jsonLoader.go

@@ -0,0 +1,386 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description		Different strategies to load JSON files.
+// 					Includes References (file and HTTP), JSON strings and Go types.
+//
+// created          01-02-2015
+
+package gojsonschema
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/xeipuuv/gojsonreference"
+)
+
+var osFS = osFileSystem(os.Open)
+
+// JSONLoader defines the JSON loader interface
+type JSONLoader interface {
+	JsonSource() interface{}
+	LoadJSON() (interface{}, error)
+	JsonReference() (gojsonreference.JsonReference, error)
+	LoaderFactory() JSONLoaderFactory
+}
+
+// JSONLoaderFactory defines the JSON loader factory interface
+type JSONLoaderFactory interface {
+	// New creates a new JSON loader for the given source
+	New(source string) JSONLoader
+}
+
+// DefaultJSONLoaderFactory is the default JSON loader factory
+type DefaultJSONLoaderFactory struct {
+}
+
+// FileSystemJSONLoaderFactory is a JSON loader factory that uses http.FileSystem
+type FileSystemJSONLoaderFactory struct {
+	fs http.FileSystem
+}
+
+// New creates a new JSON loader for the given source
+func (d DefaultJSONLoaderFactory) New(source string) JSONLoader {
+	return &jsonReferenceLoader{
+		fs:     osFS,
+		source: source,
+	}
+}
+
+// New creates a new JSON loader for the given source
+func (f FileSystemJSONLoaderFactory) New(source string) JSONLoader {
+	return &jsonReferenceLoader{
+		fs:     f.fs,
+		source: source,
+	}
+}
+
+// osFileSystem is a functional wrapper for os.Open that implements http.FileSystem.
+type osFileSystem func(string) (*os.File, error)
+
+// Opens a file with the given name
+func (o osFileSystem) Open(name string) (http.File, error) {
+	return o(name)
+}
+
+// JSON Reference loader
+// references are used to load JSONs from files and HTTP
+
+type jsonReferenceLoader struct {
+	fs     http.FileSystem
+	source string
+}
+
+func (l *jsonReferenceLoader) JsonSource() interface{} {
+	return l.source
+}
+
+func (l *jsonReferenceLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference(l.JsonSource().(string))
+}
+
+func (l *jsonReferenceLoader) LoaderFactory() JSONLoaderFactory {
+	return &FileSystemJSONLoaderFactory{
+		fs: l.fs,
+	}
+}
+
+// NewReferenceLoader returns a JSON reference loader using the given source and the local OS file system.
+func NewReferenceLoader(source string) JSONLoader {
+	return &jsonReferenceLoader{
+		fs:     osFS,
+		source: source,
+	}
+}
+
+// NewReferenceLoaderFileSystem returns a JSON reference loader using the given source and file system.
+func NewReferenceLoaderFileSystem(source string, fs http.FileSystem) JSONLoader {
+	return &jsonReferenceLoader{
+		fs:     fs,
+		source: source,
+	}
+}
+
+func (l *jsonReferenceLoader) LoadJSON() (interface{}, error) {
+
+	var err error
+
+	reference, err := gojsonreference.NewJsonReference(l.JsonSource().(string))
+	if err != nil {
+		return nil, err
+	}
+
+	refToURL := reference
+	refToURL.GetUrl().Fragment = ""
+
+	var document interface{}
+
+	if reference.HasFileScheme {
+
+		filename := strings.TrimPrefix(refToURL.String(), "file://")
+		filename, err = url.QueryUnescape(filename)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if runtime.GOOS == "windows" {
+			// on Windows, a file URL may have an extra leading slash, use slashes
+			// instead of backslashes, and have spaces escaped
+			filename = strings.TrimPrefix(filename, "/")
+			filename = filepath.FromSlash(filename)
+		}
+
+		document, err = l.loadFromFile(filename)
+		if err != nil {
+			return nil, err
+		}
+
+	} else {
+
+		document, err = l.loadFromHTTP(refToURL.String())
+		if err != nil {
+			return nil, err
+		}
+
+	}
+
+	return document, nil
+
+}
+
+func (l *jsonReferenceLoader) loadFromHTTP(address string) (interface{}, error) {
+
+	// returned cached versions for metaschemas for drafts 4, 6 and 7
+	// for performance and allow for easier offline use
+	if metaSchema := drafts.GetMetaSchema(address); metaSchema != "" {
+		return decodeJSONUsingNumber(strings.NewReader(metaSchema))
+	}
+
+	resp, err := http.Get(address)
+	if err != nil {
+		return nil, err
+	}
+
+	// must return HTTP Status 200 OK
+	if resp.StatusCode != http.StatusOK {
+		return nil, errors.New(formatErrorDescription(Locale.HttpBadStatus(), ErrorDetails{"status": resp.Status}))
+	}
+
+	bodyBuff, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return decodeJSONUsingNumber(bytes.NewReader(bodyBuff))
+}
+
+func (l *jsonReferenceLoader) loadFromFile(path string) (interface{}, error) {
+	f, err := l.fs.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	bodyBuff, err := ioutil.ReadAll(f)
+	if err != nil {
+		return nil, err
+	}
+
+	return decodeJSONUsingNumber(bytes.NewReader(bodyBuff))
+
+}
+
+// JSON string loader
+
+type jsonStringLoader struct {
+	source string
+}
+
+func (l *jsonStringLoader) JsonSource() interface{} {
+	return l.source
+}
+
+func (l *jsonStringLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+
+func (l *jsonStringLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
+// NewStringLoader creates a new JSONLoader, taking a string as source
+func NewStringLoader(source string) JSONLoader {
+	return &jsonStringLoader{source: source}
+}
+
+func (l *jsonStringLoader) LoadJSON() (interface{}, error) {
+
+	return decodeJSONUsingNumber(strings.NewReader(l.JsonSource().(string)))
+
+}
+
+// JSON bytes loader
+
+type jsonBytesLoader struct {
+	source []byte
+}
+
+func (l *jsonBytesLoader) JsonSource() interface{} {
+	return l.source
+}
+
+func (l *jsonBytesLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+
+func (l *jsonBytesLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
+// NewBytesLoader creates a new JSONLoader, taking a `[]byte` as source
+func NewBytesLoader(source []byte) JSONLoader {
+	return &jsonBytesLoader{source: source}
+}
+
+func (l *jsonBytesLoader) LoadJSON() (interface{}, error) {
+	return decodeJSONUsingNumber(bytes.NewReader(l.JsonSource().([]byte)))
+}
+
+// JSON Go (types) loader
+// used to load JSONs from the code as maps, interface{}, structs ...
+
+type jsonGoLoader struct {
+	source interface{}
+}
+
+func (l *jsonGoLoader) JsonSource() interface{} {
+	return l.source
+}
+
+func (l *jsonGoLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+
+func (l *jsonGoLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
+// NewGoLoader creates a new JSONLoader from a given Go struct
+func NewGoLoader(source interface{}) JSONLoader {
+	return &jsonGoLoader{source: source}
+}
+
+func (l *jsonGoLoader) LoadJSON() (interface{}, error) {
+
+	// convert it to a compliant JSON first to avoid types "mismatches"
+
+	jsonBytes, err := json.Marshal(l.JsonSource())
+	if err != nil {
+		return nil, err
+	}
+
+	return decodeJSONUsingNumber(bytes.NewReader(jsonBytes))
+
+}
+
+type jsonIOLoader struct {
+	buf *bytes.Buffer
+}
+
+// NewReaderLoader creates a new JSON loader using the provided io.Reader
+func NewReaderLoader(source io.Reader) (JSONLoader, io.Reader) {
+	buf := &bytes.Buffer{}
+	return &jsonIOLoader{buf: buf}, io.TeeReader(source, buf)
+}
+
+// NewWriterLoader creates a new JSON loader using the provided io.Writer
+func NewWriterLoader(source io.Writer) (JSONLoader, io.Writer) {
+	buf := &bytes.Buffer{}
+	return &jsonIOLoader{buf: buf}, io.MultiWriter(source, buf)
+}
+
+func (l *jsonIOLoader) JsonSource() interface{} {
+	return l.buf.String()
+}
+
+func (l *jsonIOLoader) LoadJSON() (interface{}, error) {
+	return decodeJSONUsingNumber(l.buf)
+}
+
+func (l *jsonIOLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+
+func (l *jsonIOLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
+// JSON raw loader
+// In case the JSON is already marshalled to interface{} use this loader
+// This is used for testing as otherwise there is no guarantee the JSON is marshalled
+// "properly" by using https://golang.org/pkg/encoding/json/#Decoder.UseNumber
+type jsonRawLoader struct {
+	source interface{}
+}
+
+// NewRawLoader creates a new JSON raw loader for the given source
+func NewRawLoader(source interface{}) JSONLoader {
+	return &jsonRawLoader{source: source}
+}
+func (l *jsonRawLoader) JsonSource() interface{} {
+	return l.source
+}
+func (l *jsonRawLoader) LoadJSON() (interface{}, error) {
+	return l.source, nil
+}
+func (l *jsonRawLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+func (l *jsonRawLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
+func decodeJSONUsingNumber(r io.Reader) (interface{}, error) {
+
+	var document interface{}
+
+	decoder := json.NewDecoder(r)
+	decoder.UseNumber()
+
+	err := decoder.Decode(&document)
+	if err != nil {
+		return nil, err
+	}
+
+	return document, nil
+
+}

vendor/github.com/xeipuuv/gojsonschema/locales.go

@@ -0,0 +1,472 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Contains const string and messages.
+//
+// created          01-01-2015
+
+package gojsonschema
+
+type (
+	// locale is an interface for defining custom error strings
+	locale interface {
+
+		// False returns a format-string for "false" schema validation errors
+		False() string
+
+		// Required returns a format-string for "required" schema validation errors
+		Required() string
+
+		// InvalidType returns a format-string for "invalid type" schema validation errors
+		InvalidType() string
+
+		// NumberAnyOf returns a format-string for "anyOf" schema validation errors
+		NumberAnyOf() string
+
+		// NumberOneOf returns a format-string for "oneOf" schema validation errors
+		NumberOneOf() string
+
+		// NumberAllOf returns a format-string for "allOf" schema validation errors
+		NumberAllOf() string
+
+		// NumberNot returns a format-string to format a NumberNotError
+		NumberNot() string
+
+		// MissingDependency returns a format-string for "missing dependency" schema validation errors
+		MissingDependency() string
+
+		// Internal returns a format-string for internal errors
+		Internal() string
+
+		// Const returns a format-string to format a ConstError
+		Const() string
+
+		// Enum returns a format-string to format an EnumError
+		Enum() string
+
+		// ArrayNotEnoughItems returns a format-string to format an error for arrays having not enough items to match positional list of schema
+		ArrayNotEnoughItems() string
+
+		// ArrayNoAdditionalItems returns a format-string to format an ArrayNoAdditionalItemsError
+		ArrayNoAdditionalItems() string
+
+		// ArrayMinItems returns a format-string to format an ArrayMinItemsError
+		ArrayMinItems() string
+
+		// ArrayMaxItems returns a format-string to format an ArrayMaxItemsError
+		ArrayMaxItems() string
+
+		// Unique returns a format-string  to format an ItemsMustBeUniqueError
+		Unique() string
+
+		// ArrayContains returns a format-string to format an ArrayContainsError
+		ArrayContains() string
+
+		// ArrayMinProperties returns a format-string to format an ArrayMinPropertiesError
+		ArrayMinProperties() string
+
+		// ArrayMaxProperties returns a format-string to format an ArrayMaxPropertiesError
+		ArrayMaxProperties() string
+
+		// AdditionalPropertyNotAllowed returns a format-string to format an AdditionalPropertyNotAllowedError
+		AdditionalPropertyNotAllowed() string
+
+		// InvalidPropertyPattern returns a format-string to format an InvalidPropertyPatternError
+		InvalidPropertyPattern() string
+
+		// InvalidPropertyName returns a format-string to format an InvalidPropertyNameError
+		InvalidPropertyName() string
+
+		// StringGTE returns a format-string to format an StringLengthGTEError
+		StringGTE() string
+
+		// StringLTE returns a format-string to format an StringLengthLTEError
+		StringLTE() string
+
+		// DoesNotMatchPattern returns a format-string to format an DoesNotMatchPatternError
+		DoesNotMatchPattern() string
+
+		// DoesNotMatchFormat returns a format-string to format an DoesNotMatchFormatError
+		DoesNotMatchFormat() string
+
+		// MultipleOf returns a format-string to format an MultipleOfError
+		MultipleOf() string
+
+		// NumberGTE returns a format-string to format an NumberGTEError
+		NumberGTE() string
+
+		// NumberGT returns a format-string to format an NumberGTError
+		NumberGT() string
+
+		// NumberLTE returns a format-string to format an NumberLTEError
+		NumberLTE() string
+
+		// NumberLT returns a format-string to format an NumberLTError
+		NumberLT() string
+
+		// Schema validations
+
+		// RegexPattern returns a format-string to format a regex-pattern error
+		RegexPattern() string
+
+		// GreaterThanZero returns a format-string to format an error where a number must be greater than zero
+		GreaterThanZero() string
+
+		// MustBeOfA returns a format-string to format an error where a value is of the wrong type
+		MustBeOfA() string
+
+		// MustBeOfAn returns a format-string to format an error where a value is of the wrong type
+		MustBeOfAn() string
+
+		// CannotBeUsedWithout returns a format-string to format a "cannot be used without" error
+		CannotBeUsedWithout() string
+
+		// CannotBeGT returns a format-string to format an error where a value are greater than allowed
+		CannotBeGT() string
+
+		// MustBeOfType returns a format-string to format an error where a value does not match the required type
+		MustBeOfType() string
+
+		// MustBeValidRegex returns a format-string to format an error where a regex is invalid
+		MustBeValidRegex() string
+
+		// MustBeValidFormat returns a format-string to format an error where a value does not match the expected format
+		MustBeValidFormat() string
+
+		// MustBeGTEZero returns a format-string to format an error where a value must be greater or equal than 0
+		MustBeGTEZero() string
+
+		// KeyCannotBeGreaterThan returns a format-string to format an error where a key is greater than the maximum  allowed
+		KeyCannotBeGreaterThan() string
+
+		// KeyItemsMustBeOfType returns a format-string to format an error where a key is of the wrong type
+		KeyItemsMustBeOfType() string
+
+		// KeyItemsMustBeUnique returns a format-string to format an error where keys are not unique
+		KeyItemsMustBeUnique() string
+
+		// ReferenceMustBeCanonical returns a format-string to format a "reference must be canonical" error
+		ReferenceMustBeCanonical() string
+
+		// NotAValidType returns a format-string to format an invalid type error
+		NotAValidType() string
+
+		// Duplicated returns a format-string to format an error where types are duplicated
+		Duplicated() string
+
+		// HttpBadStatus returns a format-string for errors when loading a schema using HTTP
+		HttpBadStatus() string
+
+		// ParseError returns a format-string for JSON parsing errors
+		ParseError() string
+
+		// ConditionThen returns a format-string for ConditionThenError errors
+		ConditionThen() string
+
+		// ConditionElse returns a format-string for ConditionElseError errors
+		ConditionElse() string
+
+		// ErrorFormat returns a format string for errors
+		ErrorFormat() string
+	}
+
+	// DefaultLocale is the default locale for this package
+	DefaultLocale struct{}
+)
+
+// False returns a format-string for "false" schema validation errors
+func (l DefaultLocale) False() string {
+	return "False always fails validation"
+}
+
+// Required returns a format-string for "required" schema validation errors
+func (l DefaultLocale) Required() string {
+	return `{{.property}} is required`
+}
+
+// InvalidType returns a format-string for "invalid type" schema validation errors
+func (l DefaultLocale) InvalidType() string {
+	return `Invalid type. Expected: {{.expected}}, given: {{.given}}`
+}
+
+// NumberAnyOf returns a format-string for "anyOf" schema validation errors
+func (l DefaultLocale) NumberAnyOf() string {
+	return `Must validate at least one schema (anyOf)`
+}
+
+// NumberOneOf returns a format-string for "oneOf" schema validation errors
+func (l DefaultLocale) NumberOneOf() string {
+	return `Must validate one and only one schema (oneOf)`
+}
+
+// NumberAllOf returns a format-string for "allOf" schema validation errors
+func (l DefaultLocale) NumberAllOf() string {
+	return `Must validate all the schemas (allOf)`
+}
+
+// NumberNot returns a format-string to format a NumberNotError
+func (l DefaultLocale) NumberNot() string {
+	return `Must not validate the schema (not)`
+}
+
+// MissingDependency returns a format-string for "missing dependency" schema validation errors
+func (l DefaultLocale) MissingDependency() string {
+	return `Has a dependency on {{.dependency}}`
+}
+
+// Internal returns a format-string for internal errors
+func (l DefaultLocale) Internal() string {
+	return `Internal Error {{.error}}`
+}
+
+// Const returns a format-string to format a ConstError
+func (l DefaultLocale) Const() string {
+	return `{{.field}} does not match: {{.allowed}}`
+}
+
+// Enum returns a format-string to format an EnumError
+func (l DefaultLocale) Enum() string {
+	return `{{.field}} must be one of the following: {{.allowed}}`
+}
+
+// ArrayNoAdditionalItems returns a format-string to format an ArrayNoAdditionalItemsError
+func (l DefaultLocale) ArrayNoAdditionalItems() string {
+	return `No additional items allowed on array`
+}
+
+// ArrayNotEnoughItems returns a format-string to format an error for arrays having not enough items to match positional list of schema
+func (l DefaultLocale) ArrayNotEnoughItems() string {
+	return `Not enough items on array to match positional list of schema`
+}
+
+// ArrayMinItems returns a format-string to format an ArrayMinItemsError
+func (l DefaultLocale) ArrayMinItems() string {
+	return `Array must have at least {{.min}} items`
+}
+
+// ArrayMaxItems returns a format-string to format an ArrayMaxItemsError
+func (l DefaultLocale) ArrayMaxItems() string {
+	return `Array must have at most {{.max}} items`
+}
+
+// Unique returns a format-string  to format an ItemsMustBeUniqueError
+func (l DefaultLocale) Unique() string {
+	return `{{.type}} items[{{.i}},{{.j}}] must be unique`
+}
+
+// ArrayContains returns a format-string to format an ArrayContainsError
+func (l DefaultLocale) ArrayContains() string {
+	return `At least one of the items must match`
+}
+
+// ArrayMinProperties returns a format-string to format an ArrayMinPropertiesError
+func (l DefaultLocale) ArrayMinProperties() string {
+	return `Must have at least {{.min}} properties`
+}
+
+// ArrayMaxProperties returns a format-string to format an ArrayMaxPropertiesError
+func (l DefaultLocale) ArrayMaxProperties() string {
+	return `Must have at most {{.max}} properties`
+}
+
+// AdditionalPropertyNotAllowed returns a format-string to format an AdditionalPropertyNotAllowedError
+func (l DefaultLocale) AdditionalPropertyNotAllowed() string {
+	return `Additional property {{.property}} is not allowed`
+}
+
+// InvalidPropertyPattern returns a format-string to format an InvalidPropertyPatternError
+func (l DefaultLocale) InvalidPropertyPattern() string {
+	return `Property "{{.property}}" does not match pattern {{.pattern}}`
+}
+
+// InvalidPropertyName returns a format-string to format an InvalidPropertyNameError
+func (l DefaultLocale) InvalidPropertyName() string {
+	return `Property name of "{{.property}}" does not match`
+}
+
+// StringGTE returns a format-string to format an StringLengthGTEError
+func (l DefaultLocale) StringGTE() string {
+	return `String length must be greater than or equal to {{.min}}`
+}
+
+// StringLTE returns a format-string to format an StringLengthLTEError
+func (l DefaultLocale) StringLTE() string {
+	return `String length must be less than or equal to {{.max}}`
+}
+
+// DoesNotMatchPattern returns a format-string to format an DoesNotMatchPatternError
+func (l DefaultLocale) DoesNotMatchPattern() string {
+	return `Does not match pattern '{{.pattern}}'`
+}
+
+// DoesNotMatchFormat returns a format-string to format an DoesNotMatchFormatError
+func (l DefaultLocale) DoesNotMatchFormat() string {
+	return `Does not match format '{{.format}}'`
+}
+
+// MultipleOf returns a format-string to format an MultipleOfError
+func (l DefaultLocale) MultipleOf() string {
+	return `Must be a multiple of {{.multiple}}`
+}
+
+// NumberGTE returns the format string to format a NumberGTEError
+func (l DefaultLocale) NumberGTE() string {
+	return `Must be greater than or equal to {{.min}}`
+}
+
+// NumberGT returns the format string to format a NumberGTError
+func (l DefaultLocale) NumberGT() string {
+	return `Must be greater than {{.min}}`
+}
+
+// NumberLTE returns the format string to format a NumberLTEError
+func (l DefaultLocale) NumberLTE() string {
+	return `Must be less than or equal to {{.max}}`
+}
+
+// NumberLT returns the format string to format a NumberLTError
+func (l DefaultLocale) NumberLT() string {
+	return `Must be less than {{.max}}`
+}
+
+// Schema validators
+
+// RegexPattern returns a format-string to format a regex-pattern error
+func (l DefaultLocale) RegexPattern() string {
+	return `Invalid regex pattern '{{.pattern}}'`
+}
+
+// GreaterThanZero returns a format-string to format an error where a number must be greater than zero
+func (l DefaultLocale) GreaterThanZero() string {
+	return `{{.number}} must be strictly greater than 0`
+}
+
+// MustBeOfA returns a format-string to format an error where a value is of the wrong type
+func (l DefaultLocale) MustBeOfA() string {
+	return `{{.x}} must be of a {{.y}}`
+}
+
+// MustBeOfAn returns a format-string to format an error where a value is of the wrong type
+func (l DefaultLocale) MustBeOfAn() string {
+	return `{{.x}} must be of an {{.y}}`
+}
+
+// CannotBeUsedWithout returns a format-string to format a "cannot be used without" error
+func (l DefaultLocale) CannotBeUsedWithout() string {
+	return `{{.x}} cannot be used without {{.y}}`
+}
+
+// CannotBeGT returns a format-string to format an error where a value are greater than allowed
+func (l DefaultLocale) CannotBeGT() string {
+	return `{{.x}} cannot be greater than {{.y}}`
+}
+
+// MustBeOfType returns a format-string to format an error where a value does not match the required type
+func (l DefaultLocale) MustBeOfType() string {
+	return `{{.key}} must be of type {{.type}}`
+}
+
+// MustBeValidRegex returns a format-string to format an error where a regex is invalid
+func (l DefaultLocale) MustBeValidRegex() string {
+	return `{{.key}} must be a valid regex`
+}
+
+// MustBeValidFormat returns a format-string to format an error where a value does not match the expected format
+func (l DefaultLocale) MustBeValidFormat() string {
+	return `{{.key}} must be a valid format {{.given}}`
+}
+
+// MustBeGTEZero returns a format-string to format an error where a value must be greater or equal than 0
+func (l DefaultLocale) MustBeGTEZero() string {
+	return `{{.key}} must be greater than or equal to 0`
+}
+
+// KeyCannotBeGreaterThan returns a format-string to format an error where a value is greater than the maximum  allowed
+func (l DefaultLocale) KeyCannotBeGreaterThan() string {
+	return `{{.key}} cannot be greater than {{.y}}`
+}
+
+// KeyItemsMustBeOfType returns a format-string to format an error where a key is of the wrong type
+func (l DefaultLocale) KeyItemsMustBeOfType() string {
+	return `{{.key}} items must be {{.type}}`
+}
+
+// KeyItemsMustBeUnique returns a format-string to format an error where keys are not unique
+func (l DefaultLocale) KeyItemsMustBeUnique() string {
+	return `{{.key}} items must be unique`
+}
+
+// ReferenceMustBeCanonical returns a format-string to format a "reference must be canonical" error
+func (l DefaultLocale) ReferenceMustBeCanonical() string {
+	return `Reference {{.reference}} must be canonical`
+}
+
+// NotAValidType returns a format-string to format an invalid type error
+func (l DefaultLocale) NotAValidType() string {
+	return `has a primitive type that is NOT VALID -- given: {{.given}} Expected valid values are:{{.expected}}`
+}
+
+// Duplicated returns a format-string to format an error where types are duplicated
+func (l DefaultLocale) Duplicated() string {
+	return `{{.type}} type is duplicated`
+}
+
+// HttpBadStatus returns a format-string for errors when loading a schema using HTTP
+func (l DefaultLocale) HttpBadStatus() string {
+	return `Could not read schema from HTTP, response status is {{.status}}`
+}
+
+// ErrorFormat returns a format string for errors
+// Replacement options: field, description, context, value
+func (l DefaultLocale) ErrorFormat() string {
+	return `{{.field}}: {{.description}}`
+}
+
+// ParseError returns a format-string for JSON parsing errors
+func (l DefaultLocale) ParseError() string {
+	return `Expected: {{.expected}}, given: Invalid JSON`
+}
+
+// ConditionThen returns a format-string for ConditionThenError errors
+// If/Else
+func (l DefaultLocale) ConditionThen() string {
+	return `Must validate "then" as "if" was valid`
+}
+
+// ConditionElse returns a format-string for ConditionElseError errors
+func (l DefaultLocale) ConditionElse() string {
+	return `Must validate "else" as "if" was not valid`
+}
+
+// constants
+const (
+	STRING_NUMBER                     = "number"
+	STRING_ARRAY_OF_STRINGS           = "array of strings"
+	STRING_ARRAY_OF_SCHEMAS           = "array of schemas"
+	STRING_SCHEMA                     = "valid schema"
+	STRING_SCHEMA_OR_ARRAY_OF_STRINGS = "schema or array of strings"
+	STRING_PROPERTIES                 = "properties"
+	STRING_DEPENDENCY                 = "dependency"
+	STRING_PROPERTY                   = "property"
+	STRING_UNDEFINED                  = "undefined"
+	STRING_CONTEXT_ROOT               = "(root)"
+	STRING_ROOT_SCHEMA_PROPERTY       = "(root)"
+)

vendor/github.com/xeipuuv/gojsonschema/result.go

@@ -0,0 +1,220 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Result and ResultError implementations.
+//
+// created          01-01-2015
+
+package gojsonschema
+
+import (
+	"fmt"
+	"strings"
+)
+
+type (
+	// ErrorDetails is a map of details specific to each error.
+	// While the values will vary, every error will contain a "field" value
+	ErrorDetails map[string]interface{}
+
+	// ResultError is the interface that library errors must implement
+	ResultError interface {
+		// Field returns the field name without the root context
+		// i.e. firstName or person.firstName instead of (root).firstName or (root).person.firstName
+		Field() string
+		// SetType sets the error-type
+		SetType(string)
+		// Type returns the error-type
+		Type() string
+		// SetContext sets the JSON-context for the error
+		SetContext(*JsonContext)
+		// Context returns the JSON-context of the error
+		Context() *JsonContext
+		// SetDescription sets a description for the error
+		SetDescription(string)
+		// Description returns the description of the error
+		Description() string
+		// SetDescriptionFormat sets the format for the description in the default text/template format
+		SetDescriptionFormat(string)
+		// DescriptionFormat returns the format for the description in the default text/template format
+		DescriptionFormat() string
+		// SetValue sets the value related to the error
+		SetValue(interface{})
+		// Value returns the value related to the error
+		Value() interface{}
+		// SetDetails sets the details specific to the error
+		SetDetails(ErrorDetails)
+		// Details returns details about the error
+		Details() ErrorDetails
+		// String returns a string representation of the error
+		String() string
+	}
+
+	// ResultErrorFields holds the fields for each ResultError implementation.
+	// ResultErrorFields implements the ResultError interface, so custom errors
+	// can be defined by just embedding this type
+	ResultErrorFields struct {
+		errorType         string       // A string with the type of error (i.e. invalid_type)
+		context           *JsonContext // Tree like notation of the part that failed the validation. ex (root).a.b ...
+		description       string       // A human readable error message
+		descriptionFormat string       // A format for human readable error message
+		value             interface{}  // Value given by the JSON file that is the source of the error
+		details           ErrorDetails
+	}
+
+	// Result holds the result of a validation
+	Result struct {
+		errors []ResultError
+		// Scores how well the validation matched. Useful in generating
+		// better error messages for anyOf and oneOf.
+		score int
+	}
+)
+
+// Field returns the field name without the root context
+// i.e. firstName or person.firstName instead of (root).firstName or (root).person.firstName
+func (v *ResultErrorFields) Field() string {
+	return strings.TrimPrefix(v.context.String(), STRING_ROOT_SCHEMA_PROPERTY+".")
+}
+
+// SetType sets the error-type
+func (v *ResultErrorFields) SetType(errorType string) {
+	v.errorType = errorType
+}
+
+// Type returns the error-type
+func (v *ResultErrorFields) Type() string {
+	return v.errorType
+}
+
+// SetContext sets the JSON-context for the error
+func (v *ResultErrorFields) SetContext(context *JsonContext) {
+	v.context = context
+}
+
+// Context returns the JSON-context of the error
+func (v *ResultErrorFields) Context() *JsonContext {
+	return v.context
+}
+
+// SetDescription sets a description for the error
+func (v *ResultErrorFields) SetDescription(description string) {
+	v.description = description
+}
+
+// Description returns the description of the error
+func (v *ResultErrorFields) Description() string {
+	return v.description
+}
+
+// SetDescriptionFormat sets the format for the description in the default text/template format
+func (v *ResultErrorFields) SetDescriptionFormat(descriptionFormat string) {
+	v.descriptionFormat = descriptionFormat
+}
+
+// DescriptionFormat returns the format for the description in the default text/template format
+func (v *ResultErrorFields) DescriptionFormat() string {
+	return v.descriptionFormat
+}
+
+// SetValue sets the value related to the error
+func (v *ResultErrorFields) SetValue(value interface{}) {
+	v.value = value
+}
+
+// Value returns the value related to the error
+func (v *ResultErrorFields) Value() interface{} {
+	return v.value
+}
+
+// SetDetails sets the details specific to the error
+func (v *ResultErrorFields) SetDetails(details ErrorDetails) {
+	v.details = details
+}
+
+// Details returns details about the error
+func (v *ResultErrorFields) Details() ErrorDetails {
+	return v.details
+}
+
+// String returns a string representation of the error
+func (v ResultErrorFields) String() string {
+	// as a fallback, the value is displayed go style
+	valueString := fmt.Sprintf("%v", v.value)
+
+	// marshal the go value value to json
+	if v.value == nil {
+		valueString = TYPE_NULL
+	} else {
+		if vs, err := marshalToJSONString(v.value); err == nil {
+			if vs == nil {
+				valueString = TYPE_NULL
+			} else {
+				valueString = *vs
+			}
+		}
+	}
+
+	return formatErrorDescription(Locale.ErrorFormat(), ErrorDetails{
+		"context":     v.context.String(),
+		"description": v.description,
+		"value":       valueString,
+		"field":       v.Field(),
+	})
+}
+
+// Valid indicates if no errors were found
+func (v *Result) Valid() bool {
+	return len(v.errors) == 0
+}
+
+// Errors returns the errors that were found
+func (v *Result) Errors() []ResultError {
+	return v.errors
+}
+
+// AddError appends a fully filled error to the error set
+// SetDescription() will be called with the result of the parsed err.DescriptionFormat()
+func (v *Result) AddError(err ResultError, details ErrorDetails) {
+	if _, exists := details["context"]; !exists && err.Context() != nil {
+		details["context"] = err.Context().String()
+	}
+
+	err.SetDescription(formatErrorDescription(err.DescriptionFormat(), details))
+
+	v.errors = append(v.errors, err)
+}
+
+func (v *Result) addInternalError(err ResultError, context *JsonContext, value interface{}, details ErrorDetails) {
+	newError(err, context, value, Locale, details)
+	v.errors = append(v.errors, err)
+	v.score -= 2 // results in a net -1 when added to the +1 we get at the end of the validation function
+}
+
+// Used to copy errors from a sub-schema to the main one
+func (v *Result) mergeErrors(otherResult *Result) {
+	v.errors = append(v.errors, otherResult.Errors()...)
+	v.score += otherResult.score
+}
+
+func (v *Result) incrementScore() {
+	v.score++
+}

vendor/github.com/xeipuuv/gojsonschema/schemaLoader.go

@@ -0,0 +1,206 @@
+// Copyright 2018 johandorland ( https://github.com/johandorland )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gojsonschema
+
+import (
+	"bytes"
+	"errors"
+
+	"github.com/xeipuuv/gojsonreference"
+)
+
+// SchemaLoader is used to load schemas
+type SchemaLoader struct {
+	pool       *schemaPool
+	AutoDetect bool
+	Validate   bool
+	Draft      Draft
+}
+
+// NewSchemaLoader creates a new NewSchemaLoader
+func NewSchemaLoader() *SchemaLoader {
+
+	ps := &SchemaLoader{
+		pool: &schemaPool{
+			schemaPoolDocuments: make(map[string]*schemaPoolDocument),
+		},
+		AutoDetect: true,
+		Validate:   false,
+		Draft:      Hybrid,
+	}
+	ps.pool.autoDetect = &ps.AutoDetect
+
+	return ps
+}
+
+func (sl *SchemaLoader) validateMetaschema(documentNode interface{}) error {
+
+	var (
+		schema string
+		err    error
+	)
+	if sl.AutoDetect {
+		schema, _, err = parseSchemaURL(documentNode)
+		if err != nil {
+			return err
+		}
+	}
+
+	// If no explicit "$schema" is used, use the default metaschema associated with the draft used
+	if schema == "" {
+		if sl.Draft == Hybrid {
+			return nil
+		}
+		schema = drafts.GetSchemaURL(sl.Draft)
+	}
+
+	//Disable validation when loading the metaschema to prevent an infinite recursive loop
+	sl.Validate = false
+
+	metaSchema, err := sl.Compile(NewReferenceLoader(schema))
+
+	if err != nil {
+		return err
+	}
+
+	sl.Validate = true
+
+	result := metaSchema.validateDocument(documentNode)
+
+	if !result.Valid() {
+		var res bytes.Buffer
+		for _, err := range result.Errors() {
+			res.WriteString(err.String())
+			res.WriteString("\n")
+		}
+		return errors.New(res.String())
+	}
+
+	return nil
+}
+
+// AddSchemas adds an arbritrary amount of schemas to the schema cache. As this function does not require
+// an explicit URL, every schema should contain an $id, so that it can be referenced by the main schema
+func (sl *SchemaLoader) AddSchemas(loaders ...JSONLoader) error {
+	emptyRef, _ := gojsonreference.NewJsonReference("")
+
+	for _, loader := range loaders {
+		doc, err := loader.LoadJSON()
+
+		if err != nil {
+			return err
+		}
+
+		if sl.Validate {
+			if err := sl.validateMetaschema(doc); err != nil {
+				return err
+			}
+		}
+
+		// Directly use the Recursive function, so that it get only added to the schema pool by $id
+		// and not by the ref of the document as it's empty
+		if err = sl.pool.parseReferences(doc, emptyRef, false); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+//AddSchema adds a schema under the provided URL to the schema cache
+func (sl *SchemaLoader) AddSchema(url string, loader JSONLoader) error {
+
+	ref, err := gojsonreference.NewJsonReference(url)
+
+	if err != nil {
+		return err
+	}
+
+	doc, err := loader.LoadJSON()
+
+	if err != nil {
+		return err
+	}
+
+	if sl.Validate {
+		if err := sl.validateMetaschema(doc); err != nil {
+			return err
+		}
+	}
+
+	return sl.pool.parseReferences(doc, ref, true)
+}
+
+// Compile loads and compiles a schema
+func (sl *SchemaLoader) Compile(rootSchema JSONLoader) (*Schema, error) {
+
+	ref, err := rootSchema.JsonReference()
+
+	if err != nil {
+		return nil, err
+	}
+
+	d := Schema{}
+	d.pool = sl.pool
+	d.pool.jsonLoaderFactory = rootSchema.LoaderFactory()
+	d.documentReference = ref
+	d.referencePool = newSchemaReferencePool()
+
+	var doc interface{}
+	if ref.String() != "" {
+		// Get document from schema pool
+		spd, err := d.pool.GetDocument(d.documentReference)
+		if err != nil {
+			return nil, err
+		}
+		doc = spd.Document
+	} else {
+		// Load JSON directly
+		doc, err = rootSchema.LoadJSON()
+		if err != nil {
+			return nil, err
+		}
+		// References need only be parsed if loading JSON directly
+		//  as pool.GetDocument already does this for us if loading by reference
+		err = sl.pool.parseReferences(doc, ref, true)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if sl.Validate {
+		if err := sl.validateMetaschema(doc); err != nil {
+			return nil, err
+		}
+	}
+
+	draft := sl.Draft
+	if sl.AutoDetect {
+		_, detectedDraft, err := parseSchemaURL(doc)
+		if err != nil {
+			return nil, err
+		}
+		if detectedDraft != nil {
+			draft = *detectedDraft
+		}
+	}
+
+	err = d.parse(doc, draft)
+	if err != nil {
+		return nil, err
+	}
+
+	return &d, nil
+}

vendor/github.com/xeipuuv/gojsonschema/schemaPool.go

@@ -0,0 +1,215 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description		Defines resources pooling.
+//                  Eases referencing and avoids downloading the same resource twice.
+//
+// created          26-02-2013
+
+package gojsonschema
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/xeipuuv/gojsonreference"
+)
+
+type schemaPoolDocument struct {
+	Document interface{}
+	Draft    *Draft
+}
+
+type schemaPool struct {
+	schemaPoolDocuments map[string]*schemaPoolDocument
+	jsonLoaderFactory   JSONLoaderFactory
+	autoDetect          *bool
+}
+
+func (p *schemaPool) parseReferences(document interface{}, ref gojsonreference.JsonReference, pooled bool) error {
+
+	var (
+		draft     *Draft
+		err       error
+		reference = ref.String()
+	)
+	// Only the root document should be added to the schema pool if pooled is true
+	if _, ok := p.schemaPoolDocuments[reference]; pooled && ok {
+		return fmt.Errorf("Reference already exists: \"%s\"", reference)
+	}
+
+	if *p.autoDetect {
+		_, draft, err = parseSchemaURL(document)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = p.parseReferencesRecursive(document, ref, draft)
+
+	if pooled {
+		p.schemaPoolDocuments[reference] = &schemaPoolDocument{Document: document, Draft: draft}
+	}
+
+	return err
+}
+
+func (p *schemaPool) parseReferencesRecursive(document interface{}, ref gojsonreference.JsonReference, draft *Draft) error {
+	// parseReferencesRecursive parses a JSON document and resolves all $id and $ref references.
+	// For $ref references it takes into account the $id scope it is in and replaces
+	// the reference by the absolute resolved reference
+
+	// When encountering errors it fails silently. Error handling is done when the schema
+	// is syntactically parsed and any error encountered here should also come up there.
+	switch m := document.(type) {
+	case []interface{}:
+		for _, v := range m {
+			p.parseReferencesRecursive(v, ref, draft)
+		}
+	case map[string]interface{}:
+		localRef := &ref
+
+		keyID := KEY_ID_NEW
+		if existsMapKey(m, KEY_ID) {
+			keyID = KEY_ID
+		}
+		if existsMapKey(m, keyID) && isKind(m[keyID], reflect.String) {
+			jsonReference, err := gojsonreference.NewJsonReference(m[keyID].(string))
+			if err == nil {
+				localRef, err = ref.Inherits(jsonReference)
+				if err == nil {
+					if _, ok := p.schemaPoolDocuments[localRef.String()]; ok {
+						return fmt.Errorf("Reference already exists: \"%s\"", localRef.String())
+					}
+					p.schemaPoolDocuments[localRef.String()] = &schemaPoolDocument{Document: document, Draft: draft}
+				}
+			}
+		}
+
+		if existsMapKey(m, KEY_REF) && isKind(m[KEY_REF], reflect.String) {
+			jsonReference, err := gojsonreference.NewJsonReference(m[KEY_REF].(string))
+			if err == nil {
+				absoluteRef, err := localRef.Inherits(jsonReference)
+				if err == nil {
+					m[KEY_REF] = absoluteRef.String()
+				}
+			}
+		}
+
+		for k, v := range m {
+			// const and enums should be interpreted literally, so ignore them
+			if k == KEY_CONST || k == KEY_ENUM {
+				continue
+			}
+			// Something like a property or a dependency is not a valid schema, as it might describe properties named "$ref", "$id" or "const", etc
+			// Therefore don't treat it like a schema.
+			if k == KEY_PROPERTIES || k == KEY_DEPENDENCIES || k == KEY_PATTERN_PROPERTIES {
+				if child, ok := v.(map[string]interface{}); ok {
+					for _, v := range child {
+						p.parseReferencesRecursive(v, *localRef, draft)
+					}
+				}
+			} else {
+				p.parseReferencesRecursive(v, *localRef, draft)
+			}
+		}
+	}
+	return nil
+}
+
+func (p *schemaPool) GetDocument(reference gojsonreference.JsonReference) (*schemaPoolDocument, error) {
+
+	var (
+		spd   *schemaPoolDocument
+		draft *Draft
+		ok    bool
+		err   error
+	)
+
+	if internalLogEnabled {
+		internalLog("Get Document ( %s )", reference.String())
+	}
+
+	// Create a deep copy, so we can remove the fragment part later on without altering the original
+	refToURL, _ := gojsonreference.NewJsonReference(reference.String())
+
+	// First check if the given fragment is a location independent identifier
+	// http://json-schema.org/latest/json-schema-core.html#rfc.section.8.2.3
+
+	if spd, ok = p.schemaPoolDocuments[refToURL.String()]; ok {
+		if internalLogEnabled {
+			internalLog(" From pool")
+		}
+		return spd, nil
+	}
+
+	// If the given reference is not a location independent identifier,
+	// strip the fragment and look for a document with it's base URI
+
+	refToURL.GetUrl().Fragment = ""
+
+	if cachedSpd, ok := p.schemaPoolDocuments[refToURL.String()]; ok {
+		document, _, err := reference.GetPointer().Get(cachedSpd.Document)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if internalLogEnabled {
+			internalLog(" From pool")
+		}
+
+		spd = &schemaPoolDocument{Document: document, Draft: cachedSpd.Draft}
+		p.schemaPoolDocuments[reference.String()] = spd
+
+		return spd, nil
+	}
+
+	// It is not possible to load anything remotely that is not canonical...
+	if !reference.IsCanonical() {
+		return nil, errors.New(formatErrorDescription(
+			Locale.ReferenceMustBeCanonical(),
+			ErrorDetails{"reference": reference.String()},
+		))
+	}
+
+	jsonReferenceLoader := p.jsonLoaderFactory.New(reference.String())
+	document, err := jsonReferenceLoader.LoadJSON()
+
+	if err != nil {
+		return nil, err
+	}
+
+	// add the whole document to the pool for potential re-use
+	p.parseReferences(document, refToURL, true)
+
+	_, draft, _ = parseSchemaURL(document)
+
+	// resolve the potential fragment and also cache it
+	document, _, err = reference.GetPointer().Get(document)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &schemaPoolDocument{Document: document, Draft: draft}, nil
+}

vendor/github.com/xeipuuv/gojsonschema/schemaReferencePool.go

@@ -0,0 +1,68 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Pool of referenced schemas.
+//
+// created          25-06-2013
+
+package gojsonschema
+
+import (
+	"fmt"
+)
+
+type schemaReferencePool struct {
+	documents map[string]*subSchema
+}
+
+func newSchemaReferencePool() *schemaReferencePool {
+
+	p := &schemaReferencePool{}
+	p.documents = make(map[string]*subSchema)
+
+	return p
+}
+
+func (p *schemaReferencePool) Get(ref string) (r *subSchema, o bool) {
+
+	if internalLogEnabled {
+		internalLog(fmt.Sprintf("Schema Reference ( %s )", ref))
+	}
+
+	if sch, ok := p.documents[ref]; ok {
+		if internalLogEnabled {
+			internalLog(fmt.Sprintf(" From pool"))
+		}
+		return sch, true
+	}
+
+	return nil, false
+}
+
+func (p *schemaReferencePool) Add(ref string, sch *subSchema) {
+
+	if internalLogEnabled {
+		internalLog(fmt.Sprintf("Add Schema Reference %s to pool", ref))
+	}
+	if _, ok := p.documents[ref]; !ok {
+		p.documents[ref] = sch
+	}
+}

vendor/github.com/xeipuuv/gojsonschema/schemaType.go

@@ -0,0 +1,83 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Helper structure to handle schema types, and the combination of them.
+//
+// created          28-02-2013
+
+package gojsonschema
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+type jsonSchemaType struct {
+	types []string
+}
+
+// Is the schema typed ? that is containing at least one type
+// When not typed, the schema does not need any type validation
+func (t *jsonSchemaType) IsTyped() bool {
+	return len(t.types) > 0
+}
+
+func (t *jsonSchemaType) Add(etype string) error {
+
+	if !isStringInSlice(JSON_TYPES, etype) {
+		return errors.New(formatErrorDescription(Locale.NotAValidType(), ErrorDetails{"given": "/" + etype + "/", "expected": JSON_TYPES}))
+	}
+
+	if t.Contains(etype) {
+		return errors.New(formatErrorDescription(Locale.Duplicated(), ErrorDetails{"type": etype}))
+	}
+
+	t.types = append(t.types, etype)
+
+	return nil
+}
+
+func (t *jsonSchemaType) Contains(etype string) bool {
+
+	for _, v := range t.types {
+		if v == etype {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (t *jsonSchemaType) String() string {
+
+	if len(t.types) == 0 {
+		return STRING_UNDEFINED // should never happen
+	}
+
+	// Displayed as a list [type1,type2,...]
+	if len(t.types) > 1 {
+		return fmt.Sprintf("[%s]", strings.Join(t.types, ","))
+	}
+
+	// Only one type: name only
+	return t.types[0]
+}

vendor/github.com/xeipuuv/gojsonschema/subSchema.go

@@ -0,0 +1,149 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Defines the structure of a sub-subSchema.
+//                  A sub-subSchema can contain other sub-schemas.
+//
+// created          27-02-2013
+
+package gojsonschema
+
+import (
+	"github.com/xeipuuv/gojsonreference"
+	"math/big"
+	"regexp"
+)
+
+// Constants
+const (
+	KEY_SCHEMA                = "$schema"
+	KEY_ID                    = "id"
+	KEY_ID_NEW                = "$id"
+	KEY_REF                   = "$ref"
+	KEY_TITLE                 = "title"
+	KEY_DESCRIPTION           = "description"
+	KEY_TYPE                  = "type"
+	KEY_ITEMS                 = "items"
+	KEY_ADDITIONAL_ITEMS      = "additionalItems"
+	KEY_PROPERTIES            = "properties"
+	KEY_PATTERN_PROPERTIES    = "patternProperties"
+	KEY_ADDITIONAL_PROPERTIES = "additionalProperties"
+	KEY_PROPERTY_NAMES        = "propertyNames"
+	KEY_DEFINITIONS           = "definitions"
+	KEY_MULTIPLE_OF           = "multipleOf"
+	KEY_MINIMUM               = "minimum"
+	KEY_MAXIMUM               = "maximum"
+	KEY_EXCLUSIVE_MINIMUM     = "exclusiveMinimum"
+	KEY_EXCLUSIVE_MAXIMUM     = "exclusiveMaximum"
+	KEY_MIN_LENGTH            = "minLength"
+	KEY_MAX_LENGTH            = "maxLength"
+	KEY_PATTERN               = "pattern"
+	KEY_FORMAT                = "format"
+	KEY_MIN_PROPERTIES        = "minProperties"
+	KEY_MAX_PROPERTIES        = "maxProperties"
+	KEY_DEPENDENCIES          = "dependencies"
+	KEY_REQUIRED              = "required"
+	KEY_MIN_ITEMS             = "minItems"
+	KEY_MAX_ITEMS             = "maxItems"
+	KEY_UNIQUE_ITEMS          = "uniqueItems"
+	KEY_CONTAINS              = "contains"
+	KEY_CONST                 = "const"
+	KEY_ENUM                  = "enum"
+	KEY_ONE_OF                = "oneOf"
+	KEY_ANY_OF                = "anyOf"
+	KEY_ALL_OF                = "allOf"
+	KEY_NOT                   = "not"
+	KEY_IF                    = "if"
+	KEY_THEN                  = "then"
+	KEY_ELSE                  = "else"
+)
+
+type subSchema struct {
+	draft *Draft
+
+	// basic subSchema meta properties
+	id          *gojsonreference.JsonReference
+	title       *string
+	description *string
+
+	property string
+
+	// Quick pass/fail for boolean schemas
+	pass *bool
+
+	// Types associated with the subSchema
+	types jsonSchemaType
+
+	// Reference url
+	ref *gojsonreference.JsonReference
+	// Schema referenced
+	refSchema *subSchema
+
+	// hierarchy
+	parent                      *subSchema
+	itemsChildren               []*subSchema
+	itemsChildrenIsSingleSchema bool
+	propertiesChildren          []*subSchema
+
+	// validation : number / integer
+	multipleOf       *big.Rat
+	maximum          *big.Rat
+	exclusiveMaximum *big.Rat
+	minimum          *big.Rat
+	exclusiveMinimum *big.Rat
+
+	// validation : string
+	minLength *int
+	maxLength *int
+	pattern   *regexp.Regexp
+	format    string
+
+	// validation : object
+	minProperties *int
+	maxProperties *int
+	required      []string
+
+	dependencies         map[string]interface{}
+	additionalProperties interface{}
+	patternProperties    map[string]*subSchema
+	propertyNames        *subSchema
+
+	// validation : array
+	minItems    *int
+	maxItems    *int
+	uniqueItems bool
+	contains    *subSchema
+
+	additionalItems interface{}
+
+	// validation : all
+	_const *string //const is a golang keyword
+	enum   []string
+
+	// validation : subSchema
+	oneOf []*subSchema
+	anyOf []*subSchema
+	allOf []*subSchema
+	not   *subSchema
+	_if   *subSchema // if/else are golang keywords
+	_then *subSchema
+	_else *subSchema
+}

vendor/github.com/xeipuuv/gojsonschema/types.go

@@ -0,0 +1,62 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Contains const types for schema and JSON.
+//
+// created          28-02-2013
+
+package gojsonschema
+
+// Type constants
+const (
+	TYPE_ARRAY   = `array`
+	TYPE_BOOLEAN = `boolean`
+	TYPE_INTEGER = `integer`
+	TYPE_NUMBER  = `number`
+	TYPE_NULL    = `null`
+	TYPE_OBJECT  = `object`
+	TYPE_STRING  = `string`
+)
+
+// JSON_TYPES hosts the list of type that are supported in JSON
+var JSON_TYPES []string
+
+// SCHEMA_TYPES hosts the list of type that are supported in schemas
+var SCHEMA_TYPES []string
+
+func init() {
+	JSON_TYPES = []string{
+		TYPE_ARRAY,
+		TYPE_BOOLEAN,
+		TYPE_INTEGER,
+		TYPE_NUMBER,
+		TYPE_NULL,
+		TYPE_OBJECT,
+		TYPE_STRING}
+
+	SCHEMA_TYPES = []string{
+		TYPE_ARRAY,
+		TYPE_BOOLEAN,
+		TYPE_INTEGER,
+		TYPE_NUMBER,
+		TYPE_OBJECT,
+		TYPE_STRING}
+}

vendor/github.com/xeipuuv/gojsonschema/utils.go

@@ -0,0 +1,197 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Various utility functions.
+//
+// created          26-02-2013
+
+package gojsonschema
+
+import (
+	"encoding/json"
+	"math/big"
+	"reflect"
+)
+
+func isKind(what interface{}, kinds ...reflect.Kind) bool {
+	target := what
+	if isJSONNumber(what) {
+		// JSON Numbers are strings!
+		target = *mustBeNumber(what)
+	}
+	targetKind := reflect.ValueOf(target).Kind()
+	for _, kind := range kinds {
+		if targetKind == kind {
+			return true
+		}
+	}
+	return false
+}
+
+func existsMapKey(m map[string]interface{}, k string) bool {
+	_, ok := m[k]
+	return ok
+}
+
+func isStringInSlice(s []string, what string) bool {
+	for i := range s {
+		if s[i] == what {
+			return true
+		}
+	}
+	return false
+}
+
+// indexStringInSlice returns the index of the first instance of 'what' in s or -1 if it is not found in s.
+func indexStringInSlice(s []string, what string) int {
+	for i := range s {
+		if s[i] == what {
+			return i
+		}
+	}
+	return -1
+}
+
+func marshalToJSONString(value interface{}) (*string, error) {
+
+	mBytes, err := json.Marshal(value)
+	if err != nil {
+		return nil, err
+	}
+
+	sBytes := string(mBytes)
+	return &sBytes, nil
+}
+
+func marshalWithoutNumber(value interface{}) (*string, error) {
+
+	// The JSON is decoded using https://golang.org/pkg/encoding/json/#Decoder.UseNumber
+	// This means the numbers are internally still represented as strings and therefore 1.00 is unequal to 1
+	// One way to eliminate these differences is to decode and encode the JSON one more time without Decoder.UseNumber
+	// so that these differences in representation are removed
+
+	jsonString, err := marshalToJSONString(value)
+	if err != nil {
+		return nil, err
+	}
+
+	var document interface{}
+
+	err = json.Unmarshal([]byte(*jsonString), &document)
+	if err != nil {
+		return nil, err
+	}
+
+	return marshalToJSONString(document)
+}
+
+func isJSONNumber(what interface{}) bool {
+
+	switch what.(type) {
+
+	case json.Number:
+		return true
+	}
+
+	return false
+}
+
+func checkJSONInteger(what interface{}) (isInt bool) {
+
+	jsonNumber := what.(json.Number)
+
+	bigFloat, isValidNumber := new(big.Rat).SetString(string(jsonNumber))
+
+	return isValidNumber && bigFloat.IsInt()
+
+}
+
+// same as ECMA Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER
+const (
+	maxJSONFloat = float64(1<<53 - 1)  // 9007199254740991.0 	 2^53 - 1
+	minJSONFloat = -float64(1<<53 - 1) //-9007199254740991.0	-2^53 - 1
+)
+
+func mustBeInteger(what interface{}) *int {
+
+	if isJSONNumber(what) {
+
+		number := what.(json.Number)
+
+		isInt := checkJSONInteger(number)
+
+		if isInt {
+
+			int64Value, err := number.Int64()
+			if err != nil {
+				return nil
+			}
+
+			int32Value := int(int64Value)
+			return &int32Value
+		}
+
+	}
+
+	return nil
+}
+
+func mustBeNumber(what interface{}) *big.Rat {
+
+	if isJSONNumber(what) {
+		number := what.(json.Number)
+		float64Value, success := new(big.Rat).SetString(string(number))
+		if success {
+			return float64Value
+		}
+	}
+
+	return nil
+
+}
+
+func convertDocumentNode(val interface{}) interface{} {
+
+	if lval, ok := val.([]interface{}); ok {
+
+		res := []interface{}{}
+		for _, v := range lval {
+			res = append(res, convertDocumentNode(v))
+		}
+
+		return res
+
+	}
+
+	if mval, ok := val.(map[interface{}]interface{}); ok {
+
+		res := map[string]interface{}{}
+
+		for k, v := range mval {
+			res[k.(string)] = convertDocumentNode(v)
+		}
+
+		return res
+
+	}
+
+	return val
+}

vendor/github.com/xeipuuv/gojsonschema/validation.go

@@ -0,0 +1,858 @@
+// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// author           xeipuuv
+// author-github    https://github.com/xeipuuv
+// author-mail      xeipuuv@gmail.com
+//
+// repository-name  gojsonschema
+// repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
+//
+// description      Extends Schema and subSchema, implements the validation phase.
+//
+// created          28-02-2013
+
+package gojsonschema
+
+import (
+	"encoding/json"
+	"math/big"
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+// Validate loads and validates a JSON schema
+func Validate(ls JSONLoader, ld JSONLoader) (*Result, error) {
+	// load schema
+	schema, err := NewSchema(ls)
+	if err != nil {
+		return nil, err
+	}
+	return schema.Validate(ld)
+}
+
+// Validate loads and validates a JSON document
+func (v *Schema) Validate(l JSONLoader) (*Result, error) {
+	root, err := l.LoadJSON()
+	if err != nil {
+		return nil, err
+	}
+	return v.validateDocument(root), nil
+}
+
+func (v *Schema) validateDocument(root interface{}) *Result {
+	result := &Result{}
+	context := NewJsonContext(STRING_CONTEXT_ROOT, nil)
+	v.rootSchema.validateRecursive(v.rootSchema, root, result, context)
+	return result
+}
+
+func (v *subSchema) subValidateWithContext(document interface{}, context *JsonContext) *Result {
+	result := &Result{}
+	v.validateRecursive(v, document, result, context)
+	return result
+}
+
+// Walker function to validate the json recursively against the subSchema
+func (v *subSchema) validateRecursive(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *JsonContext) {
+
+	if internalLogEnabled {
+		internalLog("validateRecursive %s", context.String())
+		internalLog(" %v", currentNode)
+	}
+
+	// Handle true/false schema as early as possible as all other fields will be nil
+	if currentSubSchema.pass != nil {
+		if !*currentSubSchema.pass {
+			result.addInternalError(
+				new(FalseError),
+				context,
+				currentNode,
+				ErrorDetails{},
+			)
+		}
+		return
+	}
+
+	// Handle referenced schemas, returns directly when a $ref is found
+	if currentSubSchema.refSchema != nil {
+		v.validateRecursive(currentSubSchema.refSchema, currentNode, result, context)
+		return
+	}
+
+	// Check for null value
+	if currentNode == nil {
+		if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_NULL) {
+			result.addInternalError(
+				new(InvalidTypeError),
+				context,
+				currentNode,
+				ErrorDetails{
+					"expected": currentSubSchema.types.String(),
+					"given":    TYPE_NULL,
+				},
+			)
+			return
+		}
+
+		currentSubSchema.validateSchema(currentSubSchema, currentNode, result, context)
+		v.validateCommon(currentSubSchema, currentNode, result, context)
+
+	} else { // Not a null value
+
+		if isJSONNumber(currentNode) {
+
+			value := currentNode.(json.Number)
+
+			isInt := checkJSONInteger(value)
+
+			validType := currentSubSchema.types.Contains(TYPE_NUMBER) || (isInt && currentSubSchema.types.Contains(TYPE_INTEGER))
+
+			if currentSubSchema.types.IsTyped() && !validType {
+
+				givenType := TYPE_INTEGER
+				if !isInt {
+					givenType = TYPE_NUMBER
+				}
+
+				result.addInternalError(
+					new(InvalidTypeError),
+					context,
+					currentNode,
+					ErrorDetails{
+						"expected": currentSubSchema.types.String(),
+						"given":    givenType,
+					},
+				)
+				return
+			}
+
+			currentSubSchema.validateSchema(currentSubSchema, value, result, context)
+			v.validateNumber(currentSubSchema, value, result, context)
+			v.validateCommon(currentSubSchema, value, result, context)
+			v.validateString(currentSubSchema, value, result, context)
+
+		} else {
+
+			rValue := reflect.ValueOf(currentNode)
+			rKind := rValue.Kind()
+
+			switch rKind {
+
+			// Slice => JSON array
+
+			case reflect.Slice:
+
+				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_ARRAY) {
+					result.addInternalError(
+						new(InvalidTypeError),
+						context,
+						currentNode,
+						ErrorDetails{
+							"expected": currentSubSchema.types.String(),
+							"given":    TYPE_ARRAY,
+						},
+					)
+					return
+				}
+
+				castCurrentNode := currentNode.([]interface{})
+
+				currentSubSchema.validateSchema(currentSubSchema, castCurrentNode, result, context)
+
+				v.validateArray(currentSubSchema, castCurrentNode, result, context)
+				v.validateCommon(currentSubSchema, castCurrentNode, result, context)
+
+			// Map => JSON object
+
+			case reflect.Map:
+				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_OBJECT) {
+					result.addInternalError(
+						new(InvalidTypeError),
+						context,
+						currentNode,
+						ErrorDetails{
+							"expected": currentSubSchema.types.String(),
+							"given":    TYPE_OBJECT,
+						},
+					)
+					return
+				}
+
+				castCurrentNode, ok := currentNode.(map[string]interface{})
+				if !ok {
+					castCurrentNode = convertDocumentNode(currentNode).(map[string]interface{})
+				}
+
+				currentSubSchema.validateSchema(currentSubSchema, castCurrentNode, result, context)
+
+				v.validateObject(currentSubSchema, castCurrentNode, result, context)
+				v.validateCommon(currentSubSchema, castCurrentNode, result, context)
+
+				for _, pSchema := range currentSubSchema.propertiesChildren {
+					nextNode, ok := castCurrentNode[pSchema.property]
+					if ok {
+						subContext := NewJsonContext(pSchema.property, context)
+						v.validateRecursive(pSchema, nextNode, result, subContext)
+					}
+				}
+
+			// Simple JSON values : string, number, boolean
+
+			case reflect.Bool:
+
+				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_BOOLEAN) {
+					result.addInternalError(
+						new(InvalidTypeError),
+						context,
+						currentNode,
+						ErrorDetails{
+							"expected": currentSubSchema.types.String(),
+							"given":    TYPE_BOOLEAN,
+						},
+					)
+					return
+				}
+
+				value := currentNode.(bool)
+
+				currentSubSchema.validateSchema(currentSubSchema, value, result, context)
+				v.validateNumber(currentSubSchema, value, result, context)
+				v.validateCommon(currentSubSchema, value, result, context)
+				v.validateString(currentSubSchema, value, result, context)
+
+			case reflect.String:
+
+				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_STRING) {
+					result.addInternalError(
+						new(InvalidTypeError),
+						context,
+						currentNode,
+						ErrorDetails{
+							"expected": currentSubSchema.types.String(),
+							"given":    TYPE_STRING,
+						},
+					)
+					return
+				}
+
+				value := currentNode.(string)
+
+				currentSubSchema.validateSchema(currentSubSchema, value, result, context)
+				v.validateNumber(currentSubSchema, value, result, context)
+				v.validateCommon(currentSubSchema, value, result, context)
+				v.validateString(currentSubSchema, value, result, context)
+
+			}
+
+		}
+
+	}
+
+	result.incrementScore()
+}
+
+// Different kinds of validation there, subSchema / common / array / object / string...
+func (v *subSchema) validateSchema(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *JsonContext) {
+
+	if internalLogEnabled {
+		internalLog("validateSchema %s", context.String())
+		internalLog(" %v", currentNode)
+	}
+
+	if len(currentSubSchema.anyOf) > 0 {
+
+		validatedAnyOf := false
+		var bestValidationResult *Result
+
+		for _, anyOfSchema := range currentSubSchema.anyOf {
+			if !validatedAnyOf {
+				validationResult := anyOfSchema.subValidateWithContext(currentNode, context)
+				validatedAnyOf = validationResult.Valid()
+
+				if !validatedAnyOf && (bestValidationResult == nil || validationResult.score > bestValidationResult.score) {
+					bestValidationResult = validationResult
+				}
+			}
+		}
+		if !validatedAnyOf {
+
+			result.addInternalError(new(NumberAnyOfError), context, currentNode, ErrorDetails{})
+
+			if bestValidationResult != nil {
+				// add error messages of closest matching subSchema as
+				// that's probably the one the user was trying to match
+				result.mergeErrors(bestValidationResult)
+			}
+		}
+	}
+
+	if len(currentSubSchema.oneOf) > 0 {
+
+		nbValidated := 0
+		var bestValidationResult *Result
+
+		for _, oneOfSchema := range currentSubSchema.oneOf {
+			validationResult := oneOfSchema.subValidateWithContext(currentNode, context)
+			if validationResult.Valid() {
+				nbValidated++
+			} else if nbValidated == 0 && (bestValidationResult == nil || validationResult.score > bestValidationResult.score) {
+				bestValidationResult = validationResult
+			}
+		}
+
+		if nbValidated != 1 {
+
+			result.addInternalError(new(NumberOneOfError), context, currentNode, ErrorDetails{})
+
+			if nbValidated == 0 {
+				// add error messages of closest matching subSchema as
+				// that's probably the one the user was trying to match
+				result.mergeErrors(bestValidationResult)
+			}
+		}
+
+	}
+
+	if len(currentSubSchema.allOf) > 0 {
+		nbValidated := 0
+
+		for _, allOfSchema := range currentSubSchema.allOf {
+			validationResult := allOfSchema.subValidateWithContext(currentNode, context)
+			if validationResult.Valid() {
+				nbValidated++
+			}
+			result.mergeErrors(validationResult)
+		}
+
+		if nbValidated != len(currentSubSchema.allOf) {
+			result.addInternalError(new(NumberAllOfError), context, currentNode, ErrorDetails{})
+		}
+	}
+
+	if currentSubSchema.not != nil {
+		validationResult := currentSubSchema.not.subValidateWithContext(currentNode, context)
+		if validationResult.Valid() {
+			result.addInternalError(new(NumberNotError), context, currentNode, ErrorDetails{})
+		}
+	}
+
+	if currentSubSchema.dependencies != nil && len(currentSubSchema.dependencies) > 0 {
+		if isKind(currentNode, reflect.Map) {
+			for elementKey := range currentNode.(map[string]interface{}) {
+				if dependency, ok := currentSubSchema.dependencies[elementKey]; ok {
+					switch dependency := dependency.(type) {
+
+					case []string:
+						for _, dependOnKey := range dependency {
+							if _, dependencyResolved := currentNode.(map[string]interface{})[dependOnKey]; !dependencyResolved {
+								result.addInternalError(
+									new(MissingDependencyError),
+									context,
+									currentNode,
+									ErrorDetails{"dependency": dependOnKey},
+								)
+							}
+						}
+
+					case *subSchema:
+						dependency.validateRecursive(dependency, currentNode, result, context)
+					}
+				}
+			}
+		}
+	}
+
+	if currentSubSchema._if != nil {
+		validationResultIf := currentSubSchema._if.subValidateWithContext(currentNode, context)
+		if currentSubSchema._then != nil && validationResultIf.Valid() {
+			validationResultThen := currentSubSchema._then.subValidateWithContext(currentNode, context)
+			if !validationResultThen.Valid() {
+				result.addInternalError(new(ConditionThenError), context, currentNode, ErrorDetails{})
+				result.mergeErrors(validationResultThen)
+			}
+		}
+		if currentSubSchema._else != nil && !validationResultIf.Valid() {
+			validationResultElse := currentSubSchema._else.subValidateWithContext(currentNode, context)
+			if !validationResultElse.Valid() {
+				result.addInternalError(new(ConditionElseError), context, currentNode, ErrorDetails{})
+				result.mergeErrors(validationResultElse)
+			}
+		}
+	}
+
+	result.incrementScore()
+}
+
+func (v *subSchema) validateCommon(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
+
+	if internalLogEnabled {
+		internalLog("validateCommon %s", context.String())
+		internalLog(" %v", value)
+	}
+
+	// const:
+	if currentSubSchema._const != nil {
+		vString, err := marshalWithoutNumber(value)
+		if err != nil {
+			result.addInternalError(new(InternalError), context, value, ErrorDetails{"error": err})
+		}
+		if *vString != *currentSubSchema._const {
+			result.addInternalError(new(ConstError),
+				context,
+				value,
+				ErrorDetails{
+					"allowed": *currentSubSchema._const,
+				},
+			)
+		}
+	}
+
+	// enum:
+	if len(currentSubSchema.enum) > 0 {
+		vString, err := marshalWithoutNumber(value)
+		if err != nil {
+			result.addInternalError(new(InternalError), context, value, ErrorDetails{"error": err})
+		}
+		if !isStringInSlice(currentSubSchema.enum, *vString) {
+			result.addInternalError(
+				new(EnumError),
+				context,
+				value,
+				ErrorDetails{
+					"allowed": strings.Join(currentSubSchema.enum, ", "),
+				},
+			)
+		}
+	}
+
+	result.incrementScore()
+}
+
+func (v *subSchema) validateArray(currentSubSchema *subSchema, value []interface{}, result *Result, context *JsonContext) {
+
+	if internalLogEnabled {
+		internalLog("validateArray %s", context.String())
+		internalLog(" %v", value)
+	}
+
+	nbValues := len(value)
+
+	// TODO explain
+	if currentSubSchema.itemsChildrenIsSingleSchema {
+		for i := range value {
+			subContext := NewJsonContext(strconv.Itoa(i), context)
+			validationResult := currentSubSchema.itemsChildren[0].subValidateWithContext(value[i], subContext)
+			result.mergeErrors(validationResult)
+		}
+	} else {
+		if currentSubSchema.itemsChildren != nil && len(currentSubSchema.itemsChildren) > 0 {
+
+			nbItems := len(currentSubSchema.itemsChildren)
+
+			// while we have both schemas and values, check them against each other
+			for i := 0; i != nbItems && i != nbValues; i++ {
+				subContext := NewJsonContext(strconv.Itoa(i), context)
+				validationResult := currentSubSchema.itemsChildren[i].subValidateWithContext(value[i], subContext)
+				result.mergeErrors(validationResult)
+			}
+
+			if nbItems < nbValues {
+				// we have less schemas than elements in the instance array,
+				// but that might be ok if "additionalItems" is specified.
+
+				switch currentSubSchema.additionalItems.(type) {
+				case bool:
+					if !currentSubSchema.additionalItems.(bool) {
+						result.addInternalError(new(ArrayNoAdditionalItemsError), context, value, ErrorDetails{})
+					}
+				case *subSchema:
+					additionalItemSchema := currentSubSchema.additionalItems.(*subSchema)
+					for i := nbItems; i != nbValues; i++ {
+						subContext := NewJsonContext(strconv.Itoa(i), context)
+						validationResult := additionalItemSchema.subValidateWithContext(value[i], subContext)
+						result.mergeErrors(validationResult)
+					}
+				}
+			}
+		}
+	}
+
+	// minItems & maxItems
+	if currentSubSchema.minItems != nil {
+		if nbValues < int(*currentSubSchema.minItems) {
+			result.addInternalError(
+				new(ArrayMinItemsError),
+				context,
+				value,
+				ErrorDetails{"min": *currentSubSchema.minItems},
+			)
+		}
+	}
+	if currentSubSchema.maxItems != nil {
+		if nbValues > int(*currentSubSchema.maxItems) {
+			result.addInternalError(
+				new(ArrayMaxItemsError),
+				context,
+				value,
+				ErrorDetails{"max": *currentSubSchema.maxItems},
+			)
+		}
+	}
+
+	// uniqueItems:
+	if currentSubSchema.uniqueItems {
+		var stringifiedItems = make(map[string]int)
+		for j, v := range value {
+			vString, err := marshalWithoutNumber(v)
+			if err != nil {
+				result.addInternalError(new(InternalError), context, value, ErrorDetails{"err": err})
+			}
+			if i, ok := stringifiedItems[*vString]; ok {
+				result.addInternalError(
+					new(ItemsMustBeUniqueError),
+					context,
+					value,
+					ErrorDetails{"type": TYPE_ARRAY, "i": i, "j": j},
+				)
+			}
+			stringifiedItems[*vString] = j
+		}
+	}
+
+	// contains:
+
+	if currentSubSchema.contains != nil {
+		validatedOne := false
+		var bestValidationResult *Result
+
+		for i, v := range value {
+			subContext := NewJsonContext(strconv.Itoa(i), context)
+
+			validationResult := currentSubSchema.contains.subValidateWithContext(v, subContext)
+			if validationResult.Valid() {
+				validatedOne = true
+				break
+			} else {
+				if bestValidationResult == nil || validationResult.score > bestValidationResult.score {
+					bestValidationResult = validationResult
+				}
+			}
+		}
+		if !validatedOne {
+			result.addInternalError(
+				new(ArrayContainsError),
+				context,
+				value,
+				ErrorDetails{},
+			)
+			if bestValidationResult != nil {
+				result.mergeErrors(bestValidationResult)
+			}
+		}
+	}
+
+	result.incrementScore()
+}
+
+func (v *subSchema) validateObject(currentSubSchema *subSchema, value map[string]interface{}, result *Result, context *JsonContext) {
+
+	if internalLogEnabled {
+		internalLog("validateObject %s", context.String())
+		internalLog(" %v", value)
+	}
+
+	// minProperties & maxProperties:
+	if currentSubSchema.minProperties != nil {
+		if len(value) < int(*currentSubSchema.minProperties) {
+			result.addInternalError(
+				new(ArrayMinPropertiesError),
+				context,
+				value,
+				ErrorDetails{"min": *currentSubSchema.minProperties},
+			)
+		}
+	}
+	if currentSubSchema.maxProperties != nil {
+		if len(value) > int(*currentSubSchema.maxProperties) {
+			result.addInternalError(
+				new(ArrayMaxPropertiesError),
+				context,
+				value,
+				ErrorDetails{"max": *currentSubSchema.maxProperties},
+			)
+		}
+	}
+
+	// required:
+	for _, requiredProperty := range currentSubSchema.required {
+		_, ok := value[requiredProperty]
+		if ok {
+			result.incrementScore()
+		} else {
+			result.addInternalError(
+				new(RequiredError),
+				context,
+				value,
+				ErrorDetails{"property": requiredProperty},
+			)
+		}
+	}
+
+	// additionalProperty & patternProperty:
+	for pk := range value {
+
+		// Check whether this property is described by "properties"
+		found := false
+		for _, spValue := range currentSubSchema.propertiesChildren {
+			if pk == spValue.property {
+				found = true
+			}
+		}
+
+		//  Check whether this property is described by "patternProperties"
+		ppMatch := v.validatePatternProperty(currentSubSchema, pk, value[pk], result, context)
+
+		// If it is not described by neither "properties" nor "patternProperties" it must pass "additionalProperties"
+		if !found && !ppMatch {
+			switch ap := currentSubSchema.additionalProperties.(type) {
+			case bool:
+				// Handle the boolean case separately as it's cleaner to return a specific error than failing to pass the false schema
+				if !ap {
+					result.addInternalError(
+						new(AdditionalPropertyNotAllowedError),
+						context,
+						value[pk],
+						ErrorDetails{"property": pk},
+					)
+
+				}
+			case *subSchema:
+				validationResult := ap.subValidateWithContext(value[pk], NewJsonContext(pk, context))
+				result.mergeErrors(validationResult)
+			}
+		}
+	}
+
+	// propertyNames:
+	if currentSubSchema.propertyNames != nil {
+		for pk := range value {
+			validationResult := currentSubSchema.propertyNames.subValidateWithContext(pk, context)
+			if !validationResult.Valid() {
+				result.addInternalError(new(InvalidPropertyNameError),
+					context,
+					value, ErrorDetails{
+						"property": pk,
+					})
+				result.mergeErrors(validationResult)
+			}
+		}
+	}
+
+	result.incrementScore()
+}
+
+func (v *subSchema) validatePatternProperty(currentSubSchema *subSchema, key string, value interface{}, result *Result, context *JsonContext) bool {
+
+	if internalLogEnabled {
+		internalLog("validatePatternProperty %s", context.String())
+		internalLog(" %s %v", key, value)
+	}
+
+	validated := false
+
+	for pk, pv := range currentSubSchema.patternProperties {
+		if matches, _ := regexp.MatchString(pk, key); matches {
+			validated = true
+			subContext := NewJsonContext(key, context)
+			validationResult := pv.subValidateWithContext(value, subContext)
+			result.mergeErrors(validationResult)
+		}
+	}
+
+	if !validated {
+		return false
+	}
+
+	result.incrementScore()
+	return true
+}
+
+func (v *subSchema) validateString(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
+
+	// Ignore JSON numbers
+	if isJSONNumber(value) {
+		return
+	}
+
+	// Ignore non strings
+	if !isKind(value, reflect.String) {
+		return
+	}
+
+	if internalLogEnabled {
+		internalLog("validateString %s", context.String())
+		internalLog(" %v", value)
+	}
+
+	stringValue := value.(string)
+
+	// minLength & maxLength:
+	if currentSubSchema.minLength != nil {
+		if utf8.RuneCount([]byte(stringValue)) < int(*currentSubSchema.minLength) {
+			result.addInternalError(
+				new(StringLengthGTEError),
+				context,
+				value,
+				ErrorDetails{"min": *currentSubSchema.minLength},
+			)
+		}
+	}
+	if currentSubSchema.maxLength != nil {
+		if utf8.RuneCount([]byte(stringValue)) > int(*currentSubSchema.maxLength) {
+			result.addInternalError(
+				new(StringLengthLTEError),
+				context,
+				value,
+				ErrorDetails{"max": *currentSubSchema.maxLength},
+			)
+		}
+	}
+
+	// pattern:
+	if currentSubSchema.pattern != nil {
+		if !currentSubSchema.pattern.MatchString(stringValue) {
+			result.addInternalError(
+				new(DoesNotMatchPatternError),
+				context,
+				value,
+				ErrorDetails{"pattern": currentSubSchema.pattern},
+			)
+
+		}
+	}
+
+	// format
+	if currentSubSchema.format != "" {
+		if !FormatCheckers.IsFormat(currentSubSchema.format, stringValue) {
+			result.addInternalError(
+				new(DoesNotMatchFormatError),
+				context,
+				value,
+				ErrorDetails{"format": currentSubSchema.format},
+			)
+		}
+	}
+
+	result.incrementScore()
+}
+
+func (v *subSchema) validateNumber(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
+
+	// Ignore non numbers
+	if !isJSONNumber(value) {
+		return
+	}
+
+	if internalLogEnabled {
+		internalLog("validateNumber %s", context.String())
+		internalLog(" %v", value)
+	}
+
+	number := value.(json.Number)
+	float64Value, _ := new(big.Rat).SetString(string(number))
+
+	// multipleOf:
+	if currentSubSchema.multipleOf != nil {
+		if q := new(big.Rat).Quo(float64Value, currentSubSchema.multipleOf); !q.IsInt() {
+			result.addInternalError(
+				new(MultipleOfError),
+				context,
+				number,
+				ErrorDetails{
+					"multiple": new(big.Float).SetRat(currentSubSchema.multipleOf),
+				},
+			)
+		}
+	}
+
+	//maximum & exclusiveMaximum:
+	if currentSubSchema.maximum != nil {
+		if float64Value.Cmp(currentSubSchema.maximum) == 1 {
+			result.addInternalError(
+				new(NumberLTEError),
+				context,
+				number,
+				ErrorDetails{
+					"max": new(big.Float).SetRat(currentSubSchema.maximum),
+				},
+			)
+		}
+	}
+	if currentSubSchema.exclusiveMaximum != nil {
+		if float64Value.Cmp(currentSubSchema.exclusiveMaximum) >= 0 {
+			result.addInternalError(
+				new(NumberLTError),
+				context,
+				number,
+				ErrorDetails{
+					"max": new(big.Float).SetRat(currentSubSchema.exclusiveMaximum),
+				},
+			)
+		}
+	}
+
+	//minimum & exclusiveMinimum:
+	if currentSubSchema.minimum != nil {
+		if float64Value.Cmp(currentSubSchema.minimum) == -1 {
+			result.addInternalError(
+				new(NumberGTEError),
+				context,
+				number,
+				ErrorDetails{
+					"min": new(big.Float).SetRat(currentSubSchema.minimum),
+				},
+			)
+		}
+	}
+	if currentSubSchema.exclusiveMinimum != nil {
+		if float64Value.Cmp(currentSubSchema.exclusiveMinimum) <= 0 {
+			result.addInternalError(
+				new(NumberGTError),
+				context,
+				number,
+				ErrorDetails{
+					"min": new(big.Float).SetRat(currentSubSchema.exclusiveMinimum),
+				},
+			)
+		}
+	}
+
+	// format
+	if currentSubSchema.format != "" {
+		if !FormatCheckers.IsFormat(currentSubSchema.format, float64Value) {
+			result.addInternalError(
+				new(DoesNotMatchFormatError),
+				context,
+				value,
+				ErrorDetails{"format": currentSubSchema.format},
+			)
+		}
+	}
+
+	result.incrementScore()
+}

vendor/modules.txt

@@ -258,6 +258,13 @@ github.com/woodpecker-ci/expr/parse
 # github.com/woodpecker-ci/togo v0.0.0-20180401185031-50a0e4726e74
 ## explicit
 github.com/woodpecker-ci/togo
+# github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f
+github.com/xeipuuv/gojsonpointer
+# github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415
+github.com/xeipuuv/gojsonreference
+# github.com/xeipuuv/gojsonschema v1.2.0
+## explicit
+github.com/xeipuuv/gojsonschema
 # golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
 ## explicit
 golang.org/x/crypto/acme