contrib/*: Support the "--help" and "--version" options

Add "--help"/"-h" and "--version"/"-V" support to all contrib scripts.
Also, update scripts that used "-v" as a short option for "--version"
and use "-V" for the sake of consistency.

Additionally:

* Move version and usage messages to separate convenience functions in
  all scripts.

* Add a workaround to paccache to support "--help" and "--version". This
  should be replaced by a proper POSIX-compliant command line parser
  that supports long options in a future patch.

* Add a "$myver" variable to all scripts and use it whenever we refer to
  the program version (e.g. in version messages). Also, use the pacman
  version number everywhere instead of using a different versioning
  scheme for each contrib script. This is achieved by adding a
  "PACKAGE_VERSION" placeholder that is replaced by sed(1) when the
  script is built.

* Ensure we always return with exit status 0 if "--help" is used and
  return with exit status 1 if we display the usage message due to
  invalid arguments.

* Add "AUTOMAKE_OPTIONS = std-options" and add all scripts to
  "bin_SCRIPTS" to make `make installcheck` check that installed scripts
  actually support the "--help" and "--version" options.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 16 insertions, 3 deletions

diff --git a/contrib/paclog-pkglist.in b/contrib/paclog-pkglist.in
index 0b27bf36..222bbc4c 100755
--- a/contrib/paclog-pkglist.in
+++ b/contrib/paclog-pkglist.in
@@ -18,16 +18,29 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 declare -r myname='paclog-pkglist'
+declare -r myver='@PACKAGE_VERSION@'
 
 export TEXTDOMAIN='pacman'
 export TEXTDOMAINDIR='/usr/share/locale'
 declare logfile=${1:-@localstatedir@/log/pacman.log}
 
+usage() {
+	printf 'usage:   %s [pacman log]\n' "$myname"
+	printf 'example: %s @localstatedir@/log/pacman.log\n' "$myname"
+	printf '\ndefaults to: @localstatedir@/log/pacman.log\n'
+}
+
+version() {
+	printf "%s %s\n" "$myname" "$myver"
+	echo 'Copyright (C) 2011 Dave Reisner <dave@archlinux.org>'
+}
+
 if [[ $1 ]]; then
 	if [[ $1 = -@(h|-help) ]]; then
-		printf 'usage:   %s [pacman log]\n' "$myname"
-		printf 'example: %s @localstatedir@/log/pacman.log\n' "$myname"
-		printf '\ndefaults to: @localstatedir@/log/pacman.log\n'
+		usage
+		exit 0
+	elif [[ $1 = -@(V|-version) ]]; then
+		version
 		exit 0
 	elif [[ ! -e $logfile ]]; then
 		printf $"target not found: %s\n" "$1"