cmd/config set: Support for setting fields imperatively from the cli

cmd/config/internal/commands/cmdsubcreate.go

@@ -0,0 +1,93 @@
+// Copyright 2019 Google LLC
+//
+// 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/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
+	"sigs.k8s.io/kustomize/cmd/config/internal/sub"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+)
+
+// NewSubSetRunner returns a command runner.
+func NewSubSetRunner(parent string) *SubSetRunner {
+	r := &SubSetRunner{}
+	set := &cobra.Command{
+		Use:     "create PKG_DIR NAME [VALUE]",
+		Args:    cobra.ExactArgs(3),
+		Short:   commands.SubsetShort,
+		Long:    commands.SubsetLong,
+		Example: commands.SubsetExamples,
+		PreRunE: r.preRunE,
+		RunE:    r.runE,
+	}
+	set.Flags().StringVar(&r.Set.Marker.OwnedBy, "owned-by", "",
+		"set this owner on for the current value.")
+	set.Flags().StringVar(&r.Set.Marker.Description, "description", "",
+		"set this description for the current value description.")
+	set.Flags().StringVar(&r.Set.Marker.Substitution.Marker, "marker", "[MARKER]",
+		"use this marker.")
+	set.Flags().StringVar(&r.Set.Marker.Field, "field", "",
+		"name of the field to set -- e.g. --field port")
+	set.Flags().StringVar(&r.Set.ResourceMeta.Name, "name", "",
+		"name of the Resource on which to set the substitution.")
+	set.Flags().StringVar(&r.Set.ResourceMeta.Kind, "kind", "",
+		"kind of the Resource on which to set substitution.")
+	set.Flags().StringVar(&r.Set.Marker.Type, "type", "",
+		"field type -- e.g. int,float,bool,string.")
+	set.Flags().BoolVar(&r.Set.Marker.PartialMatch, "substring", false,
+		"if true, the value may be a substring of the current value.")
+	fixDocs(parent, set)
+	set.MarkFlagRequired("type")
+	set.MarkFlagRequired("field")
+	r.Command = set
+	return r
+}
+
+func SubSetCommand(parent string) *cobra.Command {
+	return NewSubSetRunner(parent).Command
+}
+
+type SubSetRunner struct {
+	Command *cobra.Command
+	Set     sub.SetSubstitutionMarker
+}
+
+func (r *SubSetRunner) runE(c *cobra.Command, args []string) error {
+	return handleError(c, r.set(c, args))
+}
+
+func (r *SubSetRunner) preRunE(c *cobra.Command, args []string) error {
+	r.Set.Marker.Substitution.Name = args[1]
+	r.Set.Marker.Substitution.Value = args[2]
+	return nil
+}
+
+// perform the substitutions
+func (r *SubSetRunner) set(c *cobra.Command, args []string) error {
+	rw := &kio.LocalPackageReadWriter{
+		PackagePath: args[0],
+	}
+	// add the substitution marker to the Resource
+	err := kio.Pipeline{
+		Inputs:  []kio.Reader{rw},
+		Filters: []kio.Filter{&r.Set},
+		Outputs: []kio.Writer{rw},
+	}.Execute()
+	if err != nil {
+		return err
+	}
+	return nil
+}