Currently when attempting to sync a group where all packages are
ignored, either by ignorepkg, ignoregroup or --needed, pacman
will error with "target not found".

Instead, if a group has no packages check if the group exists
before throwing an error.

Signed-off-by: morganamilo <morganam...@gmail.com>
---

v2: Move to frontend + fix formatting.
v3: Strip alpm_ prefix

diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index ef8faedf..57677a42 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -535,6 +535,20 @@ static int process_pkg(alpm_pkg_t *pkg)
        return 0;
 }
 
+static int group_exists(alpm_list_t *dbs, const char *name)
+{
+       alpm_list_t *i;
+       for(i = dbs; i; i = i->next) {
+               alpm_db_t *db = i->data;
+
+               if(alpm_db_get_group(db, name)) {
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
 static int process_group(alpm_list_t *dbs, const char *group, int error)
 {
        int ret = 0;
@@ -543,6 +557,10 @@ static int process_group(alpm_list_t *dbs, const char 
*group, int error)
        int count = alpm_list_count(pkgs);
 
        if(!count) {
+               if(group_exists(dbs, group)) {
+                       return 0;
+               }
+
                pm_printf(ALPM_LOG_ERROR, _("target not found: %s\n"), group);
                return 1;
        }
-- 
2.19.1

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