internal/commands/completion/bash.go

// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you 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 completion

import (
	"fmt"

	"github.com/urfave/cli/v2"
)

var bashCommand = &cli.Command{
	Name:      "bash",
	Aliases:   []string{"b"},
	Usage:     "Output shell completion code for bash",
	ArgsUsage: "[parameters...]",
	Action: func(ctx *cli.Context) error {
		fmt.Print(bashScript)
		return nil
	},
}

const bashScript = `
: ${PROG:=$(basename ${BASH_SOURCE})}

_cli_bash_autocomplete() {
  if [[ "${COMP_WORDS[0]}" != "source" ]]; then
    local cur opts base
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    if [[ "$cur" == "-"* ]]; then
      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} ${cur} --auto_complete )
    else
      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --auto_complete )
    fi
    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
    return 0
  fi
}

complete -o bashdefault -o default -o nospace -F _cli_bash_autocomplete $PROG
unset PROG

`