From f1e6902155f4aaef00c78072d3a0f8f186819965 Mon Sep 17 00:00:00 2001
From: Emanuele Petriglia <inbox@emanuelepetriglia.com>
Date: Sun, 24 Nov 2019 15:15:19 +0100
Subject: [PATCH] Add Bash completion for xfconf-query

Signed-off-by: Emanuele Petriglia <inbox@emanuelepetriglia.com>
---
 Makefile.am              |  4 +++
 completions/Makefile.am  |  4 +++
 completions/xfconf-query | 58 ++++++++++++++++++++++++++++++++++++++++
 configure.ac.in          | 19 +++++++++++++
 4 files changed, 85 insertions(+)
 create mode 100644 completions/Makefile.am
 create mode 100644 completions/xfconf-query

diff --git a/Makefile.am b/Makefile.am
index f0e0405..4d63085 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,6 +10,10 @@ SUBDIRS = \
 	docs \
 	tests
 
+if ENABLE_BASH_COMPLETION
+SUBDIRS += completions
+endif
+
 if XFCONF_ENABLE_GSETTINGS_BACKEND
 SUBDIRS += gsettings-backend
 endif
diff --git a/completions/Makefile.am b/completions/Makefile.am
new file mode 100644
index 0000000..e2014ba
--- /dev/null
+++ b/completions/Makefile.am
@@ -0,0 +1,4 @@
+if ENABLE_BASH_COMPLETION
+bashcompletiondir = $(BASH_COMPLETION_DIR)
+dist_bashcompletion_DATA = xfconf-query
+endif
diff --git a/completions/xfconf-query b/completions/xfconf-query
new file mode 100644
index 0000000..781a889
--- /dev/null
+++ b/completions/xfconf-query
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+#
+# Bash completion for xfconf-query.
+#
+# Copyright (C) 2019 Emanuele Petriglia <inbox@emanuelepetriglia.com>
+#
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
+# Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+_xfconf-query() {
+  local current options words long_options
+  COMPREPLY=()
+  current="${COMP_WORDS[$COMP_CWORD]}"
+  previous="${COMP_WORDS[$COMP_CWORD - 1]}"
+  short_options="-h -V -c -p -s -l -v -n -t -r -R -a -T -m"
+
+  long_options="--help --version --channel --property --set --list --verbose"
+  long_options+=" --create --type --reset --recursive --force-array --toggle"
+  long_options+=" --monitor"
+
+  options="$short_options $long_options"
+
+  if [[ "$current" == --* ]]; then
+    words="$long_options"
+  elif [[ "$current" == -* ]]; then
+    words="$options"
+  else
+    case "$previous" in
+      # Delete first line and the initial two spaces (see 'xfconf-query -l').
+      -c|--channel) words="$(xfconf-query -l | sed -e '1d' -e 's/^  //')" ;;
+      -p|--property)
+        # Get given channel, if exists.
+        channel="$(echo "$COMP_LINE" | grep -oPe '(-c|--channel) \K([a-z]+)')"
+
+        if [[ "$channel" ]]; then
+          words="$(xfconf-query -c "$channel" -l)"
+        fi
+        ;;
+    esac
+  fi
+
+  mapfile -t COMPREPLY < <(compgen -W "$words" -- "$current")
+  return 0
+}
+
+complete -F _xfconf-query xfconf-query
diff --git a/configure.ac.in b/configure.ac.in
index ef00e16..080e523 100644
--- a/configure.ac.in
+++ b/configure.ac.in
@@ -97,6 +97,24 @@ XDT_CHECK_PACKAGE([LIBXFCE4UTIL], [libxfce4util-1.0], [4.10.0])
 dnl check for perl bindings for --disable-perl-bindings and make-exo-alias.pl
 AC_PATH_PROGS([PERL], [perl5.8 perl5.6 perl5 perl])
 
+dnl Bash completion for xfconf-query.
+AC_ARG_WITH([bash-completion-dir],
+            AS_HELP_STRING([--with-bash-completion-dir[=PATH]],
+                           [Install the bash auto-completion script in this directory. @<:@default=yes@:>@]),
+            [],
+            [with_bash_completion_dir=yes])
+
+if test "x$with_bash_completion_dir" = "xyes"; then
+    PKG_CHECK_MODULES([BASH_COMPLETION], [bash-completion >= 2.0],
+                      [BASH_COMPLETION_DIR="`pkg-config --variable=completionsdir bash-completion`"],
+                      [BASH_COMPLETION_DIR="$datadir/bash-completion/completions"])
+else
+    BASH_COMPLETION_DIR="$with_bash_completion_dir"
+fi
+
+AC_SUBST([BASH_COMPLETION_DIR])
+AM_CONDITIONAL([ENABLE_BASH_COMPLETION],[test "x$with_bash_completion_dir" != "xno"])
+
 dnl see if we can build the perl bindings
 AC_ARG_ENABLE([perl-bindings],
               [AC_HELP_STRING([--disable-perl-bindings],
@@ -266,6 +284,7 @@ xfconf-perl/xs/Makefile
 xfconf-query/Makefile
 xfconfd/Makefile
 gsettings-backend/Makefile
+completions/Makefile
 ])
 
 dnl ***************************
-- 
2.21.0