106 lines
3.6 KiB
Bash
Executable File
106 lines
3.6 KiB
Bash
Executable File
# bash completion support for xkbcli.
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# See completion API documentation: https://github.com/scop/bash-completion
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# NOTE: The script parses the commands help messages to provide the completions,
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# thus any new subcommand or option will be supported, as long as it has its
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# entry in the help messages. This should result in low maintenancei effort.
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___xkbcli_main()
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{
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# Initialization: https://github.com/scop/bash-completion/blob/fdf4456186eb4548ef628e65fb1be73d8e4695e9/bash_completion.d/000_bash_completion_compat.bash#L205
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local cur prev words cword cmd
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_init_completion -s || return
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# Find subcommand
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local i=1
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while [[ "$i" -lt "$COMP_CWORD" ]]; do
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local s="${COMP_WORDS[i]}"
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case "$s" in
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-*) ;;
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*)
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cmd="$s"
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break
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;;
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esac
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(( i++ ))
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done
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# Parse available subcommands
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local line
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local is_command_list=false
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local subcommands=()
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while IFS='' read -r line; do
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# Traverse subcommand list
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if [[ "$is_command_list" == true ]]; then
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# Check for subcommand based on the indentation
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if [[ "$line" =~ ^[[:blank:]]{2}([[:alpha:]]([[:alnum:]]|-)+)$ ]]; then
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subcommands+=("${BASH_REMATCH[1]}")
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# Detect end of subcommand list based on indentation
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elif [[ "$line" =~ ^[[:graph:]] ]]; then
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is_command_list=false
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fi
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# Detect start of subcommand list
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elif [[ "$line" == "Commands:" ]]; then
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is_command_list=true
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fi
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# NOTE: <( COMMAND ) Bash construct is “process substitution”.
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done < <(xkbcli --help)
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# No previous subcommand or incomplete: completion for root xkbcli command
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if [[ "$i" -eq "$COMP_CWORD" ]]; then
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local opts
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# Doc for _parse_help: https://github.com/scop/bash-completion/blob/fdf4456186eb4548ef628e65fb1be73d8e4695e9/bash_completion.d/000_bash_completion_compat.bash#L311
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opts=$(_parse_help xkbcli)
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local cur="${COMP_WORDS[COMP_CWORD]}"
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COMPREPLY=($(compgen -W "${subcommands[*]} $opts" -- "$cur"))
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return
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fi
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# Found a supported subcommand: proceed to completion
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if [[ "${subcommands[*]}" =~ (^| )$cmd( |$) ]]; then
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___xkbcli_subcommand "$cmd"
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fi
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}
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___xkbcli_subcommand()
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{
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# Some special cases
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case $1 in
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compile-keymap | interactive-evdev)
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case ${COMP_WORDS[COMP_CWORD-1]} in
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--include | --keymap)
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_filedir
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return;;
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esac
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;;
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compile-compose)
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case ${COMP_WORDS[COMP_CWORD-1]} in
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--file)
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_filedir
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return;;
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esac
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;;
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list)
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if [[ ${COMP_WORDS[COMP_CWORD]} != -* ]]; then
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_filedir
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return
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fi
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;;
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esac
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# Parse help to get command options
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local opts
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# Doc for _parse_usage and _parse_help:
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# • https://github.com/scop/bash-completion/blob/fdf4456186eb4548ef628e65fb1be73d8e4695e9/bash_completion.d/000_bash_completion_compat.bash#L335
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# • https://github.com/scop/bash-completion/blob/fdf4456186eb4548ef628e65fb1be73d8e4695e9/bash_completion.d/000_bash_completion_compat.bash#L311
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# We need both as the current help messages adopt both GNU and BSD styles.
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opts=$(_parse_usage xkbcli "$1 --help")
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opts+="
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"
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opts+=$(_parse_help xkbcli "$1 --help")
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local cur="${COMP_WORDS[COMP_CWORD]}"
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COMPREPLY=($(compgen -W "$opts" -- "$cur"))
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}
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complete -F ___xkbcli_main xkbcli
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