Improve --help switch output for pacman utils

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

The --help switch does not exist for a couple of the utils, so the
help/usage text for those will be displayed when the util is run
with no arguments.

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

1 files changed, 4 insertions, 5 deletions

diff --git a/src/util/cleanupdelta.c b/src/util/cleanupdelta.c
index 4f344350..b13d770b 100644
--- a/src/util/cleanupdelta.c
+++ b/src/util/cleanupdelta.c
@@ -24,8 +24,6 @@
 #include <alpm.h>
 #include <alpm_list.h>
 
-#define BASENAME "cleanupdelta"
-
 alpm_handle_t *handle = NULL;
 
 static void cleanup(int signum)
@@ -87,9 +85,10 @@ static void checkdbs(alpm_list_t *dbnames)
 
 static void usage(void)
 {
-	fprintf(stderr, "usage:\n");
-	fprintf(stderr,
-			"\t%s [-b <pacman db>] core extra ... : check the listed sync databases\n", BASENAME);
+	fprintf(stderr, "cleanupdelta (pacman) v" PACKAGE_VERSION "\n\n"
+			"Returns a list of unused delta in a given sync database.\n\n"
+			"Usage: cleanupdelta [options]\n\n"
+			"  -b <pacman db>       core extra ... : check the listed sync databases\n");
 	exit(1);
 }