pacman: show groups once with -Sg

Only displays groups that haven't appeared yet..
Previously 'pacman -Sg' iterated over syncs, printed every group.

This change does not affect '-Sgg' which still orders by sync first.

To reproduce, on a current Arch Linux with [extra] and [community]:
$ pacman -Sg|sort|uniq -c|sort -n
[...]
      1 xorg-fonts
      2 vim-plugins
      2 xfce4-goodies

Signed-off-by: Pierre <pierre@spotify.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index 74e417c4..5165dca1 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -420,7 +420,7 @@ static int sync_search(alpm_list_t *syncs, alpm_list_t *targets)
 
 static int sync_group(int level, alpm_list_t *syncs, alpm_list_t *targets)
 {
-	alpm_list_t *i, *j, *k;
+	alpm_list_t *i, *j, *k, *s = NULL;
 
 	if(targets) {
 		for(i = targets; i; i = alpm_list_next(i)) {
@@ -456,10 +456,14 @@ static int sync_group(int level, alpm_list_t *syncs, alpm_list_t *targets)
 					}
 				} else {
 					/* print grp names only, no package names */
-					printf("%s\n", grp->name);
+					if(!alpm_list_find_str (s, grp->name)) {
+						s = alpm_list_add (s, grp->name);
+						printf("%s\n", grp->name);
+					}
 				}
 			}
 		}
+		alpm_list_free(s);
 	}
 
 	return 0;