Move ko commands to pkg/commands (#29)

* Move commands to pkg/commands and split into files.

pkg/commands/resolve.go

@@ -0,0 +1,67 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// 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 commands
+
+import (
+	"github.com/google/ko/pkg/commands/options"
+	"github.com/spf13/cobra"
+	"os"
+)
+
+// addResolve augments our CLI surface with resolve.
+func addResolve(topLevel *cobra.Command) {
+
+	lo := &options.LocalOptions{}
+	no := &options.NameOptions{}
+	fo := &options.FilenameOptions{}
+	ta := &options.TagsOptions{}
+	do := &options.DebugOptions{}
+
+	resolve := &cobra.Command{
+		Use:   "resolve -f FILENAME",
+		Short: "Print the input files with image references resolved to built/pushed image digests.",
+		Long:  `This sub-command finds import path references within the provided files, builds them into Go binaries, containerizes them, publishes them, and prints the resulting yaml.`,
+		Example: `
+  # Build and publish import path references to a Docker
+  # Registry as:
+  #   ${KO_DOCKER_REPO}/<package name>-<hash of import path>
+  # When KO_DOCKER_REPO is ko.local, it is the same as if
+  # --local and --preserve-import-paths were passed.
+  ko resolve -f config/
+
+  # Build and publish import path references to a Docker
+  # Registry preserving import path names as:
+  #   ${KO_DOCKER_REPO}/<import path>
+  # When KO_DOCKER_REPO is ko.local, it is the same as if
+  # --local was passed.
+  ko resolve --preserve-import-paths -f config/
+
+  # Build and publish import path references to a Docker
+  # daemon as:
+  #   ko.local/<import path>
+  # This always preserves import paths.
+  ko resolve --local -f config/`,
+		Args: cobra.NoArgs,
+		Run: func(cmd *cobra.Command, args []string) {
+			resolveFilesToWriter(fo, no, lo, ta, do, os.Stdout)
+		},
+	}
+	options.AddLocalArg(resolve, lo)
+	options.AddNamingArgs(resolve, no)
+	options.AddFileArg(resolve, fo)
+	options.AddTagsArg(resolve, ta)
+	options.AddDebugArg(resolve, do)
+	topLevel.AddCommand(resolve)
+}