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woodpecker/pipeline/stepBuilder.go

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// Copyright 2022 Woodpecker Authors
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// Copyright 2018 Drone.IO 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.
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package pipeline
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import (
"fmt"
"math/rand"
"net/url"
"path/filepath"
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"strings"
"github.com/drone/envsubst"
"github.com/rs/zerolog/log"
backend "github.com/woodpecker-ci/woodpecker/pipeline/backend/types"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml/compiler"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml/linter"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml/matrix"
"github.com/woodpecker-ci/woodpecker/server"
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forge_types "github.com/woodpecker-ci/woodpecker/server/forge/types"
"github.com/woodpecker-ci/woodpecker/server/model"
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)
// StepBuilder Takes the hook data and the yaml and returns in internal data model
type StepBuilder struct {
Repo *model.Repo
Curr *model.Pipeline
Last *model.Pipeline
Netrc *model.Netrc
Secs []*model.Secret
Regs []*model.Registry
Link string
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Yamls []*forge_types.FileMeta
Envs map[string]string
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}
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type Item struct {
Step *model.Step
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Platform string
Labels map[string]string
DependsOn []string
RunsOn []string
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Config *backend.Config
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}
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func (b *StepBuilder) Build() ([]*Item, error) {
var items []*Item
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b.Yamls = forge_types.SortByName(b.Yamls)
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pidSequence := 1
for _, y := range b.Yamls {
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// matrix axes
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axes, err := matrix.ParseString(string(y.Data))
if err != nil {
return nil, err
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}
if len(axes) == 0 {
axes = append(axes, matrix.Axis{})
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}
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for _, axis := range axes {
step := &model.Step{
PipelineID: b.Curr.ID,
PID: pidSequence,
PGID: pidSequence,
State: model.StatusPending,
Environ: axis,
Name: SanitizePath(y.Name),
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}
metadata := metadataFromStruct(b.Repo, b.Curr, b.Last, step, b.Link)
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environ := b.environmentVariables(metadata, axis)
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// add global environment variables for substituting
for k, v := range b.Envs {
if _, exists := environ[k]; exists {
// don't override existing values
continue
}
environ[k] = v
}
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// substitute vars
substituted, err := b.envsubst(string(y.Data), environ)
if err != nil {
return nil, err
}
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// parse yaml pipeline
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parsed, err := yaml.ParseString(substituted)
if err != nil {
return nil, &yaml.PipelineParseError{Err: err}
}
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// lint pipeline
if err := linter.New(
linter.WithTrusted(b.Repo.IsTrusted),
).Lint(parsed); err != nil {
return nil, &yaml.PipelineParseError{Err: err}
}
// checking if filtered.
if match, err := parsed.When.Match(metadata, true); !match && err == nil {
log.Debug().Str("pipeline", step.Name).Msg(
"Marked as skipped, dose not match metadata",
)
step.State = model.StatusSkipped
} else if err != nil {
log.Debug().Str("pipeline", step.Name).Msg(
"Pipeline config could not be parsed",
)
return nil, err
}
// TODO: deprecated branches filter => remove after some time
if !parsed.Branches.Match(b.Curr.Branch) && (b.Curr.Event != model.EventDeploy && b.Curr.Event != model.EventTag) {
log.Debug().Str("pipeline", step.Name).Msg(
"Marked as skipped, dose not match branch",
)
step.State = model.StatusSkipped
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}
ir, err := b.toInternalRepresentation(parsed, environ, metadata, step.ID)
if err != nil {
return nil, err
}
if len(ir.Stages) == 0 {
continue
}
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item := &Item{
Step: step,
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Config: ir,
Labels: parsed.Labels,
DependsOn: parsed.DependsOn,
RunsOn: parsed.RunsOn,
Platform: parsed.Platform,
}
if item.Labels == nil {
item.Labels = map[string]string{}
}
items = append(items, item)
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pidSequence++
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}
}
items = filterItemsWithMissingDependencies(items)
// check if at least one step can start, if list is not empty
if len(items) > 0 && !stepListContainsItemsToRun(items) {
return nil, fmt.Errorf("pipeline has no startpoint")
}
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return items, nil
}
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func stepListContainsItemsToRun(items []*Item) bool {
for i := range items {
if items[i].Step.State == model.StatusPending {
return true
}
}
return false
}
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func filterItemsWithMissingDependencies(items []*Item) []*Item {
itemsToRemove := make([]*Item, 0)
for _, item := range items {
for _, dep := range item.DependsOn {
if !containsItemWithName(dep, items) {
itemsToRemove = append(itemsToRemove, item)
}
}
}
if len(itemsToRemove) > 0 {
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filtered := make([]*Item, 0)
for _, item := range items {
if !containsItemWithName(item.Step.Name, itemsToRemove) {
filtered = append(filtered, item)
}
}
// Recursive to handle transitive deps
return filterItemsWithMissingDependencies(filtered)
}
return items
}
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func containsItemWithName(name string, items []*Item) bool {
for _, item := range items {
if name == item.Step.Name {
return true
}
}
return false
}
func (b *StepBuilder) envsubst(y string, environ map[string]string) (string, error) {
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return envsubst.Eval(y, func(name string) string {
env := environ[name]
if strings.Contains(env, "\n") {
env = fmt.Sprintf("%q", env)
}
return env
})
}
func (b *StepBuilder) environmentVariables(metadata frontend.Metadata, axis matrix.Axis) map[string]string {
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environ := metadata.Environ()
for k, v := range axis {
environ[k] = v
}
return environ
}
func (b *StepBuilder) toInternalRepresentation(parsed *yaml.Config, environ map[string]string, metadata frontend.Metadata, stepID int64) (*backend.Config, error) {
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var secrets []compiler.Secret
for _, sec := range b.Secs {
if !sec.Match(b.Curr.Event) {
continue
}
secrets = append(secrets, compiler.Secret{
Name: sec.Name,
Value: sec.Value,
Match: sec.Images,
PluginOnly: sec.PluginsOnly,
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})
}
var registries []compiler.Registry
for _, reg := range b.Regs {
registries = append(registries, compiler.Registry{
Hostname: reg.Address,
Username: reg.Username,
Password: reg.Password,
Email: reg.Email,
})
}
return compiler.New(
compiler.WithEnviron(environ),
compiler.WithEnviron(b.Envs),
compiler.WithEscalated(server.Config.Pipeline.Privileged...),
compiler.WithResourceLimit(server.Config.Pipeline.Limits.MemSwapLimit, server.Config.Pipeline.Limits.MemLimit, server.Config.Pipeline.Limits.ShmSize, server.Config.Pipeline.Limits.CPUQuota, server.Config.Pipeline.Limits.CPUShares, server.Config.Pipeline.Limits.CPUSet),
compiler.WithVolumes(server.Config.Pipeline.Volumes...),
compiler.WithNetworks(server.Config.Pipeline.Networks...),
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compiler.WithLocal(false),
compiler.WithOption(
compiler.WithNetrc(
b.Netrc.Login,
b.Netrc.Password,
b.Netrc.Machine,
),
b.Repo.IsSCMPrivate || server.Config.Pipeline.AuthenticatePublicRepos,
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),
compiler.WithDefaultCloneImage(server.Config.Pipeline.DefaultCloneImage),
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compiler.WithRegistry(registries...),
compiler.WithSecret(secrets...),
compiler.WithPrefix(
fmt.Sprintf(
"wp_%d_%d",
stepID,
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rand.Int(),
),
),
compiler.WithProxy(),
compiler.WithWorkspaceFromURL("/woodpecker", b.Repo.Link),
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compiler.WithMetadata(metadata),
compiler.WithTrusted(b.Repo.IsTrusted),
compiler.WithNetrcOnlyTrusted(b.Repo.NetrcOnlyTrusted),
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).Compile(parsed)
}
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func SetPipelineStepsOnPipeline(pipeline *model.Pipeline, pipelineItems []*Item) *model.Pipeline {
var pidSequence int
for _, item := range pipelineItems {
pipeline.Steps = append(pipeline.Steps, item.Step)
if pidSequence < item.Step.PID {
pidSequence = item.Step.PID
}
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}
for _, item := range pipelineItems {
for _, stage := range item.Config.Stages {
var gid int
for _, step := range stage.Steps {
pidSequence++
if gid == 0 {
gid = pidSequence
}
step := &model.Step{
PipelineID: pipeline.ID,
Name: step.Alias,
PID: pidSequence,
PPID: item.Step.PID,
PGID: gid,
State: model.StatusPending,
}
if item.Step.State == model.StatusSkipped {
step.State = model.StatusSkipped
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}
pipeline.Steps = append(pipeline.Steps, step)
}
}
}
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return pipeline
}
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// return the metadata from the cli context.
func metadataFromStruct(repo *model.Repo, pipeline, last *model.Pipeline, step *model.Step, link string) frontend.Metadata {
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host := link
uri, err := url.Parse(link)
if err == nil {
host = uri.Host
}
return frontend.Metadata{
Repo: frontend.Repo{
Name: repo.FullName,
Link: repo.Link,
CloneURL: repo.Clone,
Private: repo.IsSCMPrivate,
Branch: repo.Branch,
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},
Curr: metadataPipelineFromModelPipeline(pipeline, true),
Prev: metadataPipelineFromModelPipeline(last, false),
Step: frontend.Step{
Number: step.PID,
Matrix: step.Environ,
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},
Sys: frontend.System{
Name: "woodpecker",
Link: link,
Host: host,
Platform: "", // will be set by pipeline platform option or by agent
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},
}
}
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func metadataPipelineFromModelPipeline(pipeline *model.Pipeline, includeParent bool) frontend.Pipeline {
cron := ""
if pipeline.Event == model.EventCron {
cron = pipeline.Sender
}
parent := int64(0)
if includeParent {
parent = pipeline.Parent
}
return frontend.Pipeline{
Number: pipeline.Number,
Parent: parent,
Created: pipeline.Created,
Started: pipeline.Started,
Finished: pipeline.Finished,
Status: string(pipeline.Status),
Event: string(pipeline.Event),
Link: pipeline.Link,
Target: pipeline.Deploy,
Commit: frontend.Commit{
Sha: pipeline.Commit,
Ref: pipeline.Ref,
Refspec: pipeline.Refspec,
Branch: pipeline.Branch,
Message: pipeline.Message,
Author: frontend.Author{
Name: pipeline.Author,
Email: pipeline.Email,
Avatar: pipeline.Avatar,
},
ChangedFiles: pipeline.ChangedFiles,
PullRequestLabels: pipeline.PullRequestLabels,
},
Cron: cron,
}
}
func SanitizePath(path string) string {
path = filepath.Base(path)
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path = strings.TrimSuffix(path, ".yml")
path = strings.TrimSuffix(path, ".yaml")
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path = strings.TrimPrefix(path, ".")
return path
}