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, 10 insertions, 8 deletions

diff --git a/contrib/bacman.in b/contrib/bacman.in
index 00d0691b..93623565 100755
--- a/contrib/bacman.in
+++ b/contrib/bacman.in
@@ -24,7 +24,7 @@ shopt -s extglob
 shopt -s nullglob
 
 declare -r myname='bacman'
-readonly progver="0.2.1"
+declare -r myver='@PACKAGE_VERSION@'
 
 #
 # User Friendliness
@@ -35,19 +35,21 @@ usage() {
 	echo "Example: $myname kernel26"
 }
 
+version() {
+	printf "%s %s\n" "$myname" "$myver"
+	echo 'Copyright (C) 2008 locci <carlocci_at_gmail_dot_com>'
+}
+
 if (( $# != 1 )); then
 	usage
 	exit 1
 fi
 
-if [[ $1 == "--help" || $1 == "-h" ]]; then
+if [[ $1 = -@(h|-help) ]]; then
 	usage
 	exit 0
-fi
-
-if [[ $1 == "--version" || $1 == "-v" ]]; then
-	echo "$myname version $progver"
-	echo "Copyright (C) 2008 locci"
+elif [[ $1 = -@(V|-version) ]]; then
+	version
 	exit 0
 fi
 
@@ -177,7 +179,7 @@ pkg_size=$(du -sk | awk '{print $1 * 1024}')
 # TODO adopt makepkg's write_pkginfo() into this or scripts/library
 #
 echo Generating .PKGINFO metadata...
-echo "# Generated by $myname $progver"    > .PKGINFO
+echo "# Generated by $myname $myver"    > .PKGINFO
 if [[ $INFAKEROOT == "1" ]]; then
 	echo "# Using $(fakeroot -v)"    >> .PKGINFO
 fi