// Copyright © 2017-2018 Mikael Berthe <mikael@lilotux.net>
//
// Licensed under the MIT license.
// Please see the LICENSE file is this directory.
package cmd
import (
"bytes"
"io"
"os"
"strings"
"github.com/spf13/cobra"
)
var completionCmd = &cobra.Command{
Use: "completion bash|zsh",
Short: "Generate shell completion",
ValidArgs: []string{"bash", "zsh"},
Run: func(cmd *cobra.Command, args []string) {
if len(args) < 1 {
errPrint("Please specify your shell")
os.Exit(1)
}
switch args[0] {
case "bash":
if err := runCompletionBash(os.Stdout, RootCmd); err != nil {
errPrint("Error: %s", err.Error())
os.Exit(1)
}
case "zsh":
if err := runCompletionZsh(os.Stdout, RootCmd); err != nil {
errPrint("Error: %s", err.Error())
os.Exit(1)
}
default:
errPrint("Only bash is supported at the moment")
os.Exit(1)
}
},
}
func init() {
RootCmd.AddCommand(completionCmd)
}
func runCompletionBash(out io.Writer, c *cobra.Command) error {
return c.GenBashCompletion(out)
}
// Many thanks to the Kubernetes project for this one!
func runCompletionZsh(out io.Writer, c *cobra.Command) error {
const zshInitialization = `# Copyright 2016 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.
__madonctl_bash_source() {
alias shopt=':'
alias _expand=_bash_expand
alias _complete=_bash_comp
emulate -L sh
setopt kshglob noshglob braceexpand
source "$@"
}
__madonctl_type() {
# -t is not supported by zsh
if [ "$1" == "-t" ]; then
shift
# fake Bash 4 to disable "complete -o nospace". Instead
# "compopt +-o nospace" is used in the code to toggle trailing
# spaces. We don't support that, but leave trailing spaces on
# all the time
if [ "$1" = "__madonctl_compopt" ]; then
echo builtin
return 0
fi
fi
type "$@"
}
__madonctl_compgen() {
local completions w
completions=( $(compgen "$@") ) || return $?
# filter by given word as prefix
while [[ "$1" = -* && "$1" != -- ]]; do
shift
shift
done
if [[ "$1" == -- ]]; then
shift
fi
for w in "${completions[@]}"; do
if [[ "${w}" = "$1"* ]]; then
echo "${w}"
fi
done
}
__madonctl_compopt() {
true # don't do anything. Not supported by bashcompinit in zsh
}
__madonctl_declare() {
if [ "$1" == "-F" ]; then
whence -w "$@"
else
builtin declare "$@"
fi
}
__madonctl_ltrim_colon_completions()
{
if [[ "$1" == *:* && "$COMP_WORDBREAKS" == *:* ]]; then
# Remove colon-word prefix from COMPREPLY items
local colon_word=${1%${1##*:}}
local i=${#COMPREPLY[*]}
while [[ $((--i)) -ge 0 ]]; do
COMPREPLY[$i]=${COMPREPLY[$i]#"$colon_word"}
done
fi
}
__madonctl_get_comp_words_by_ref() {
cur="${COMP_WORDS[COMP_CWORD]}"
prev="${COMP_WORDS[${COMP_CWORD}-1]}"
words=("${COMP_WORDS[@]}")
cword=("${COMP_CWORD[@]}")
}
__madonctl_filedir() {
local RET OLD_IFS w qw
__debug "_filedir $@ cur=$cur"
if [[ "$1" = \~* ]]; then
# somehow does not work. Maybe, zsh does not call this at all
eval echo "$1"
return 0
fi
OLD_IFS="$IFS"
IFS=$'\n'
if [ "$1" = "-d" ]; then
shift
RET=( $(compgen -d) )
else
RET=( $(compgen -f) )
fi
IFS="$OLD_IFS"
IFS="," __debug "RET=${RET[@]} len=${#RET[@]}"
for w in ${RET[@]}; do
if [[ ! "${w}" = "${cur}"* ]]; then
continue
fi
if eval "[[ \"\${w}\" = *.$1 || -d \"\${w}\" ]]"; then
qw="$(__madonctl_quote "${w}")"
if [ -d "${w}" ]; then
COMPREPLY+=("${qw}/")
else
COMPREPLY+=("${qw}")
fi
fi
done
}
__madonctl_quote() {
if [[ $1 == \'* || $1 == \"* ]]; then
# Leave out first character
printf %q "${1:1}"
else
printf %q "$1"
fi
}
autoload -U +X bashcompinit && bashcompinit
# use word boundary patterns for BSD or GNU sed
LWORD='[[:<:]]'
RWORD='[[:>:]]'
if sed --help 2>&1 | grep -q GNU; then
LWORD='\<'
RWORD='\>'
fi
__madonctl_convert_bash_to_zsh() {
sed \
-e 's/declare -F/whence -w/' \
-e 's/local \([a-zA-Z0-9_]*\)=/local \1; \1=/' \
-e 's/flags+=("\(--.*\)=")/flags+=("\1"); two_word_flags+=("\1")/' \
-e 's/must_have_one_flag+=("\(--.*\)=")/must_have_one_flag+=("\1")/' \
-e "s/${LWORD}_filedir${RWORD}/__madonctl_filedir/g" \
-e "s/${LWORD}_get_comp_words_by_ref${RWORD}/__madonctl_get_comp_words_by_ref/g" \
-e "s/${LWORD}__ltrim_colon_completions${RWORD}/__madonctl_ltrim_colon_completions/g" \
-e "s/${LWORD}compgen${RWORD}/__madonctl_compgen/g" \
-e "s/${LWORD}compopt${RWORD}/__madonctl_compopt/g" \
-e "s/${LWORD}declare${RWORD}/__madonctl_declare/g" \
-e "s/\\\$(type${RWORD}/\$(__madonctl_type/g" \
<<'BASH_COMPLETION_EOF'
`
const zshTail = `
BASH_COMPLETION_EOF
}
__madonctl_bash_source <(__madonctl_convert_bash_to_zsh)
`
buf := new(bytes.Buffer)
out.Write([]byte(zshInitialization))
err := c.GenBashCompletion(buf)
script := strings.Replace(buf.String(), "flaghash[${flagname}]", `flaghash[workaround]`, -1)
out.Write([]byte(script))
out.Write([]byte(zshTail))
return err
}