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, 11 insertions, 2 deletions

diff --git a/contrib/pacsysclean.in b/contrib/pacsysclean.in
index c87082e0..17f7681b 100755
--- a/contrib/pacsysclean.in
+++ b/contrib/pacsysclean.in
@@ -2,23 +2,32 @@
 
 # pacsysclean - Sort installed packages by decreasing installed size. Useful for system clean-up.
 
+declare -r myname='pacsysclean'
+declare -r myver='@PACKAGE_VERSION@'
+
 PACMAN_OPTS=
 
 usage() {
-       echo "pacsysclean - Sort installed packages by decreasing installed size."
+       echo "$myname - Sort installed packages by decreasing installed size."
        echo
-       echo "Usage: pacsysclean [options]"
+       echo "Usage: $myname [options]"
        echo
        echo "Options:"
        echo "  -o <options>     Specify custom pacman query options (e.g., dt)"
        echo "  -h, --help       Show this help message and exit"
 }
 
+version() {
+  printf "%s %s\n" "$myname" "$myver"
+  echo 'Copyright (C) 2011 Eric Bélanger <snowmaniscool@gmail.com>'
+}
+
 
 if [ -n "$1" ]; then
        case "$1" in
                -o) PACMAN_OPTS="${2}" ;;
                -h|--help) usage; exit 0 ;;
+               -V|--version) version; exit 0 ;;
                *) usage; exit 1 ;;
        esac
 fi