Improve --help switch output for pacman contrib and pacman scripts

Unify the formatting of the --help switch for pacman utils, if it exists.
All of the pacman utils will now output help text using the following
format:

  util-name (pacman) v<pacman version>

  one line description of util's purpose

  Usage: util-name [options]

    -b, --bar      whatever --bar does
    -f, --foo      whatever --foo does
    -h, --help     display this help message

Reported-by: Karol Błażewicz <karol.blazewicz at gmail.com>
Signed-off-by: Jason St. John <jstjohn@purdue.edu>

1 files changed, 9 insertions, 3 deletions

diff --git a/contrib/paclog-pkglist.sh.in b/contrib/paclog-pkglist.sh.in
index 9b3abad4..aaa7586e 100644
--- a/contrib/paclog-pkglist.sh.in
+++ b/contrib/paclog-pkglist.sh.in
@@ -25,9 +25,15 @@ 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'
+	printf "%s (pacman) v%s\n" "${myname}" "${myver}"
+	echo
+	echo "Parse a log file into a list of currently installed packages"
+	echo
+	printf "Usage: %s [path to pacman log]\n" "${myname}"
+	echo
+	printf "Example: %s @localstatedir@/log/pacman.log\n" "${myname}"
+	echo
+	printf 'Defaults to: @localstatedir@/log/pacman.log'
 }
 
 version() {