Sort tags by age

This adds a function to compare timestamps and then uses it as callback
for qsort() before printing out tags.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/ui-summary.c b/ui-summary.c
index c684628..43582da 100644
--- a/ui-summary.c
+++ b/ui-summary.c
@@ -10,6 +10,23 @@
 
 static int header;
 
+static int cmp_tag_age(void *a, void *b)
+{
+        struct refinfo *r1 = *(struct refinfo **)a;
+        struct refinfo *r2 = *(struct refinfo **)b;
+
+        if (r1->tag->tagger_date != 0 && r2->tag->tagger_date != 0)
+                return r2->tag->tagger_date - r1->tag->tagger_date;
+
+        if (r1->tag->tagger_date == 0 && r2->tag->tagger_date == 0)
+                return 0;
+
+        if (r1 == 0)
+                return +1;
+
+        return -1;
+}
+
 static void cgit_print_branch(struct refinfo *ref)
 {
         struct commit *commit;
@@ -156,6 +173,7 @@ static void cgit_print_tags()
         for_each_tag_ref(cgit_refs_cb, &list);
         if (list.count == 0)
                 return;
+        qsort(list.refs, list.count, sizeof(*list.refs), cmp_tag_age);
         print_tag_header();
         for(i=0; i<list.count; i++)
                 print_tag(list.refs[i]);