add bash completion script

data/meson.build

@@ -64,4 +64,11 @@ install_data (
     join_paths (
       [datadir, 'mime/packages']))
 
+# install bash completion
+install_data (
+  'zrythm-completion.bash',
+  install_dir: '/etc/bash_completion.d',
+  install_mode: 'r--r--r--',
+  rename: 'zrythm')
+
 subdir('windows')

data/zrythm-completion.bash

@@ -0,0 +1,34 @@
+#/usr/bin/env bash
+#
+# Copyright (C) 2020 Alexandros Theodotou <alex at zrythm dot org>
+#
+# This file is part of Zrythm
+#
+# Zrythm is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Zrythm 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with Zrythm.  If not, see <https://www.gnu.org/licenses/>.
+
+_zrythm()
+{
+  local cur prev opts
+  COMPREPLY=()
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  prev="${COMP_WORDS[COMP_CWORD-1]}"
+  opts="--help --version --reset-to-factory -h -v -p --print-settings"
+
+  if [[ ${cur} == -* ]] ; then
+    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    return 0
+  fi
+}
+
+complete -o default -F _zrythm zrythm