improve bash-completion

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

configure.ac

@@ -95,6 +95,18 @@ AX_CHECK_COMPILE_FLAG([-fPIE],
 AC_SUBST(PIE_CFLAGS)
 AC_SUBST(PIE_LDFLAGS)
 
+# bash-completion
+AC_ARG_WITH([bashcompletiondir],
+            AS_HELP_STRING([--with-bashcompletiondir=DIR], [Bash completions directory]),
+            [],
+            [AS_IF([$($PKG_CONFIG --exists bash-completion)], [
+                with_bashcompletiondir=$($PKG_CONFIG --variable=completionsdir bash-completion)
+            ] , [
+                with_bashcompletiondir=${datadir}/bash-completion/completions
+            ])])
+AC_SUBST([bashcompletiondir], [$with_bashcompletiondir])
+
+
 # use gperf for faster string -> enum matching
 AC_PATH_PROG(GPERF, [gperf], [no])
 if test x$GPERF != xno ; then
@@ -120,3 +132,13 @@ docs/api/Makefile
 docs/api/version.xml
 ])
 AC_OUTPUT
+AC_MSG_RESULT([
+    $PACKAGE_NAME $VERSION
+
+    prefix:                  ${prefix}
+    sysconf dir:             ${sysconfdir}
+    datarootdir:             ${datarootdir}
+    includedir:              ${includedir}
+    lib dir:                 ${libdir}
+    Bash completion dir:     ${with_bashcompletiondir}
+              ])

data/Makefile.am

@@ -1,4 +1,7 @@
 SUBDIRS = 						\
 	tests
 
+bashcompletiondir=@bashcompletiondir@
+dist_bashcompletion_DATA = appstream-util
+
 -include $(top_srcdir)/git.mk

data/appstream-util

@@ -0,0 +1,72 @@
+# appstream-util completion                               -*- shell-script -*-
+#
+# This file is part of libappstream-glib.
+#
+# Copyright 2014 Igor Gnatenko
+#
+# 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.
+
+_appstream-util()
+{
+    local cur prev words cword
+    _init_completion -s || return
+
+    local commandix command
+    for (( commandix=1; commandix < cword; commandix++ )); do
+        if [[ ${words[commandix]} != -* ]]; then
+            command=${words[commandix]}
+            break
+        fi
+    done
+
+    case $prev in
+        -h|--help|--version)
+            return
+            ;;
+        *)
+            ;;
+    esac
+
+    $split && return
+
+    if [[ $command ]]; then
+
+        case $command in
+            validate|validate-relax|validate-strict)
+                ext='@(appdata|metainfo).xml?(.in)'
+                ;;
+            install|uninstall)
+                ext='@(appdata|metainfo).xml'
+                ;;
+            dump)
+                ext='@(desktop|@(appdata|metainfo).xml)'
+                ;;
+            *)
+                ;;
+        esac
+        [[ -n $ext ]] && _filedir $ext        
+        return
+    fi
+
+    if [[ $cur == -* ]]; then
+        COMPREPLY=( $( compgen -W '$( _parse_help "$1" )' -- "$cur" ) )
+        [[ $COMPREPLY == *= ]] && compopt -o nospace
+    elif [[ ! $command ]]; then
+        COMPREPLY=( $( compgen -W '$( "$1" list-commands 2>/dev/null )' -- "$cur" ) )
+    fi
+} &&
+complete -F _appstream-util appstream-util
+
+# ex: ts=4 sw=4 et filetype=sh