mirror of https://github.com/kubevela/kubevela.git
264 lines
6.9 KiB
Go
264 lines
6.9 KiB
Go
/*
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Copyright 2021 The KubeVela Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cli
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"github.com/spf13/cobra"
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"github.com/oam-dev/kubevela/apis/types"
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)
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const completionDesc = `Output shell completion code for the specified shell (bash or zsh).
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The shell code must be evaluated to provide interactive completion of vela commands.`
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const bashCompDesc = `Generate the autocompletion script for Vela for the bash shell.
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To load completions in your current shell session:
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$ source <(vela completion bash)
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To load completions for every new session, execute once:
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Linux:
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$ vela completion bash > /etc/bash_completion.d/vela
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MacOS:
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$ vela completion bash > /usr/local/etc/bash_completion.d/vela
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`
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const zshCompDesc = `Generate the autocompletion script for Vela for the zsh shell.
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To load completions in your current shell session:
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$ source <(vela completion zsh)
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To load completions for every new session, execute once:
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$ vela completion zsh > "${fpath[1]}/_vela"
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`
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// NewCompletionCommand Output shell completion code for the specified shell (bash or zsh)
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func NewCompletionCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "completion",
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Short: "Output shell completion code for the specified shell (bash or zsh)",
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Long: completionDesc,
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Args: nil,
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Annotations: map[string]string{
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types.TagCommandType: types.TypeSystem,
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},
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}
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bash := &cobra.Command{
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Use: "bash",
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Short: "generate autocompletions script for bash",
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Long: bashCompDesc,
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Args: nil,
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DisableFlagsInUseLine: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runCompletionBash(os.Stdout, cmd)
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},
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}
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zsh := &cobra.Command{
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Use: "zsh",
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Short: "generate autocompletions script for zsh",
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Long: zshCompDesc,
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Args: nil,
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DisableFlagsInUseLine: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runCompletionZsh(os.Stdout, cmd)
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},
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}
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cmd.AddCommand(bash, zsh)
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return cmd
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}
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func runCompletionBash(out io.Writer, cmd *cobra.Command) error {
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err := cmd.Root().GenBashCompletion(out)
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if binary := filepath.Base(os.Args[0]); binary != "vela" {
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renamedBinaryHook := `
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# Hook the command used to generate the completion script
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# to the vela completion function to handle the case where
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# the user renamed the vela binary
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if [[ $(type -t compopt) = "builtin" ]]; then
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complete -o default -F __start_vela %[1]s
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else
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complete -o default -o nospace -F __start_vela %[1]s
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fi
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`
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_, err = fmt.Fprintf(out, renamedBinaryHook, binary)
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if err != nil {
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return err
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}
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}
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return err
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}
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func runCompletionZsh(out io.Writer, cmd *cobra.Command) error {
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zshInitialization := `#compdef vela
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__vela_bash_source() {
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alias shopt=':'
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alias _expand=_bash_expand
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alias _complete=_bash_comp
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emulate -L sh
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setopt kshglob noshglob braceexpand
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source "$@"
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}
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__vela_type() {
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# -t is not supported by zsh
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if [ "$1" == "-t" ]; then
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shift
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# fake Bash 4 to disable "complete -o nospace". Instead
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# "compopt +-o nospace" is used in the code to toggle trailing
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# spaces. We don't support that, but leave trailing spaces on
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# all the time
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if [ "$1" = "__vela_compopt" ]; then
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echo builtin
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return 0
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fi
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fi
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type "$@"
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}
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__vela_compgen() {
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local completions w
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completions=( $(compgen "$@") ) || return $?
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# filter by given word as prefix
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while [[ "$1" = -* && "$1" != -- ]]; do
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shift
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shift
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done
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if [[ "$1" == -- ]]; then
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shift
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fi
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for w in "${completions[@]}"; do
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if [[ "${w}" = "$1"* ]]; then
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# Use printf instead of echo beause it is possible that
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# the value to print is -n, which would be interpreted
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# as a flag to echo
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printf "%s\n" "${w}"
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fi
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done
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}
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__vela_compopt() {
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true # don't do anything. Not supported by bashcompinit in zsh
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}
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__vela_ltrim_colon_completions()
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{
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if [[ "$1" == *:* && "$COMP_WORDBREAKS" == *:* ]]; then
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# Remove colon-word prefix from COMPREPLY items
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local colon_word=${1%${1##*:}}
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local i=${#COMPREPLY[*]}
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while [[ $((--i)) -ge 0 ]]; do
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COMPREPLY[$i]=${COMPREPLY[$i]#"$colon_word"}
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done
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fi
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}
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__vela_get_comp_words_by_ref() {
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cur="${COMP_WORDS[COMP_CWORD]}"
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prev="${COMP_WORDS[${COMP_CWORD}-1]}"
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words=("${COMP_WORDS[@]}")
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cword=("${COMP_CWORD[@]}")
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}
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__vela_filedir() {
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local RET OLD_IFS w qw
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__debug "_filedir $@ cur=$cur"
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if [[ "$1" = \~* ]]; then
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# somehow does not work. Maybe, zsh does not call this at all
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eval echo "$1"
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return 0
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fi
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OLD_IFS="$IFS"
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IFS=$'\n'
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if [ "$1" = "-d" ]; then
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shift
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RET=( $(compgen -d) )
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else
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RET=( $(compgen -f) )
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fi
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IFS="$OLD_IFS"
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IFS="," __debug "RET=${RET[@]} len=${#RET[@]}"
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for w in ${RET[@]}; do
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if [[ ! "${w}" = "${cur}"* ]]; then
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continue
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fi
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if eval "[[ \"\${w}\" = *.$1 || -d \"\${w}\" ]]"; then
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qw="$(__vela_quote "${w}")"
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if [ -d "${w}" ]; then
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COMPREPLY+=("${qw}/")
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else
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COMPREPLY+=("${qw}")
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fi
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fi
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done
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}
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__vela_quote() {
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if [[ $1 == \'* || $1 == \"* ]]; then
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# Leave out first character
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printf %q "${1:1}"
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else
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printf %q "$1"
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fi
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}
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autoload -U +X bashcompinit && bashcompinit
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# use word boundary patterns for BSD or GNU sed
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LWORD='[[:<:]]'
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RWORD='[[:>:]]'
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if sed --help 2>&1 | grep -q 'GNU\|BusyBox'; then
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LWORD='\<'
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RWORD='\>'
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fi
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__vela_convert_bash_to_zsh() {
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sed \
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-e 's/declare -F/whence -w/' \
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-e 's/_get_comp_words_by_ref "\$@"/_get_comp_words_by_ref "\$*"/' \
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-e 's/local \([a-zA-Z0-9_]*\)=/local \1; \1=/' \
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-e 's/flags+=("\(--.*\)=")/flags+=("\1"); two_word_flags+=("\1")/' \
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-e 's/must_have_one_flag+=("\(--.*\)=")/must_have_one_flag+=("\1")/' \
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-e "s/${LWORD}_filedir${RWORD}/__vela_filedir/g" \
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-e "s/${LWORD}_get_comp_words_by_ref${RWORD}/__vela_get_comp_words_by_ref/g" \
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-e "s/${LWORD}__ltrim_colon_completions${RWORD}/__vela_ltrim_colon_completions/g" \
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-e "s/${LWORD}compgen${RWORD}/__vela_compgen/g" \
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-e "s/${LWORD}compopt${RWORD}/__vela_compopt/g" \
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-e "s/${LWORD}declare${RWORD}/builtin declare/g" \
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-e "s/\\\$(type${RWORD}/\$(__vela_type/g" \
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-e 's/aliashash\["\(.\{1,\}\)"\]/aliashash[\1]/g' \
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-e 's/FUNCNAME/funcstack/g' \
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<<'BASH_COMPLETION_EOF'
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`
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_, err := out.Write([]byte(zshInitialization))
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if err != nil {
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return err
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}
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if err = runCompletionBash(out, cmd); err != nil {
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return err
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}
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zshTail := `
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BASH_COMPLETION_EOF
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}
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__vela_bash_source <(__vela_convert_bash_to_zsh)
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`
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_, err = out.Write([]byte(zshTail))
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return err
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}
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