forked from vmware-archive/kubecfg
/
completion.go
75 lines (64 loc) · 1.73 KB
/
completion.go
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// Copyright 2018 The kubecfg 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 cmd
import (
"fmt"
"os"
"path/filepath"
"strings"
"unicode"
"github.com/spf13/cobra"
)
const (
flagShell = "shell"
)
func guessShell(path string) string {
ret := filepath.Base(path)
ret = strings.TrimRightFunc(ret, unicode.IsNumber)
return ret
}
func init() {
RootCmd.AddCommand(completionCmd)
completionCmd.PersistentFlags().String(flagShell, "", "Shell variant for which to generate completions. Supported values are bash,zsh")
}
var completionCmd = &cobra.Command{
Use: "completion",
Short: "Generate shell completions for kubecfg",
Args: cobra.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
flags := cmd.Flags()
shell, err := flags.GetString(flagShell)
if err != nil {
return err
}
if shell == "" {
shell = guessShell(os.Getenv("SHELL"))
}
out := cmd.OutOrStdout()
switch shell {
case "bash":
if err := RootCmd.GenBashCompletion(out); err != nil {
return err
}
case "zsh":
if err := RootCmd.GenZshCompletion(out); err != nil {
return err
}
default:
return fmt.Errorf("Unknown shell %q, try --%s", shell, flagShell)
}
return nil
},
}