Improve command package isolation.

pkg/commands/edit/add/addbase.go

@@ -0,0 +1,98 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 add
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/pkg/commands/kustfile"
+	"sigs.k8s.io/kustomize/pkg/constants"
+	"sigs.k8s.io/kustomize/pkg/fs"
+)
+
+type addBaseOptions struct {
+	baseDirectoryPaths string
+}
+
+// newCmdAddBase adds the file path of the kustomize base to the kustomization file.
+func newCmdAddBase(fsys fs.FileSystem) *cobra.Command {
+	var o addBaseOptions
+
+	cmd := &cobra.Command{
+		Use:   "base",
+		Short: "Adds one or more bases to the kustomization.yaml in current directory",
+		Example: `
+		add base {filepath1},{filepath2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunAddBase(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates addBase command.
+func (o *addBaseOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify a base directory")
+	}
+	o.baseDirectoryPaths = args[0]
+	return nil
+}
+
+// Complete completes addBase command.
+func (o *addBaseOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunAddBase runs addBase command (do real work).
+func (o *addBaseOptions) RunAddBase(fsys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(constants.KustomizationFileName, fsys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	// split directory paths
+	paths := strings.Split(o.baseDirectoryPaths, ",")
+	for _, path := range paths {
+		if !fsys.Exists(path) {
+			return errors.New(path + " does not exist")
+		}
+		if kustfile.StringInSlice(path, m.Bases) {
+			return fmt.Errorf("base %s already in kustomization file", path)
+		}
+		m.Bases = append(m.Bases, path)
+
+	}
+
+	return mf.Write(m)
+}