glib/gio/completion/gapplication

#
# Copyright 2013 Allison Karlitskaya
#
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# licence, or (at your option) any later version.
#
# This is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, see <http://www.gnu.org/licenses/>.
#
# SPDX-License-Identifier: LGPL-2.1-or-later

# shellcheck shell=bash

# Check for bash
[ -z "$BASH_VERSION" ] && return

####################################################################################################

__app() {
  local gapplication_binary
  gapplication_binary="$1"

  case "${COMP_CWORD}" in
    1)
      # shellcheck disable=SC2207
      COMPREPLY=($(compgen -W "help version list-apps launch action list-actions" -- "${COMP_WORDS[1]}"))
      return 0
      ;;

    2)
      case "${COMP_WORDS[1]}" in
        launch|action|list-actions)
          # shellcheck disable=SC2207
          COMPREPLY=($(compgen -W "$("$gapplication_binary" list-apps)" -- "${COMP_WORDS[2]}"))
          return 0
          ;;

        *)
          COMPREPLY=()
          return 0
          ;;
      esac
      ;;
  esac

  # Otherwise, what we will do is based on the command in ${COMP_WORDS[1]}
  case "${COMP_WORDS[1]}" in
    action)
      # Word 3 is the action name.  This is the only one we can help with.
      if [ "${COMP_CWORD}" == 3 ]; then
        # shellcheck disable=SC2207
        COMPREPLY=($(compgen -W "$("$gapplication_binary" list-actions "${COMP_WORDS[2]}")" -- "${COMP_WORDS[3]}"))
        return 0
      else
        COMPREPLY=()
        return 0
      fi
      ;;
    launch)
      # Filenames...
      # shellcheck disable=SC2207
      COMPREPLY=($(compgen -A file "${COMP_WORDS[COMP_CWORD]}"))
      return 0
      ;;
    *)
      # Nothing else should be out this far...
      COMPREPLY=()
      return 0
  esac
}

####################################################################################################

complete -F __app gapplication