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
@@ -1,193 +1,211 @@
 /* ui-summary.c: functions for generating repo summary page
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 
 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;
         struct commitinfo *info;
         char *name = (char *)ref->refname;
 
         commit = lookup_commit(ref->object->sha1);
         // object is not really parsed at this point, because of some fallout
         // from previous calls to git functions in cgit_print_log()
         commit->object.parsed = 0;
         if (commit && !parse_commit(commit)){
                 info = cgit_parse_commit(commit);
                 html("<tr><td>");
                 cgit_log_link(name, NULL, NULL, name, NULL, NULL, 0);
                 html("</td><td>");
                 cgit_print_age(commit->date, -1, NULL);
                 html("</td><td>");
                 html_txt(info->author);
                 html("</td><td>");
                 cgit_commit_link(info->subject, NULL, NULL, name, NULL);
                 html("</td></tr>\n");
                 cgit_free_commitinfo(info);
         } else {
                 html("<tr><td>");
                 html_txt(name);
                 html("</td><td colspan='3'>");
                 htmlf("*** bad ref %s ***", sha1_to_hex(ref->object->sha1));
                 html("</td></tr>\n");
         }
 }
 
 static void print_tag_header()
 {
         html("<tr class='nohover'><th class='left'>Tag</th>"
              "<th class='left'>Age</th>"
              "<th class='left'>Author</th>"
              "<th class='left'>Reference</th></tr>\n");
         header = 1;
 }
 
 static int print_tag(struct refinfo *ref)
 {
         struct tag *tag;
         struct taginfo *info;
         char *url, *name = (char *)ref->refname;
 
         if (ref->object->type == OBJ_TAG) {
                 tag = lookup_tag(ref->object->sha1);
                 if (!tag || parse_tag(tag) || !(info = cgit_parse_tag(tag)))
                         return 2;
                 html("<tr><td>");
                 url = cgit_pageurl(cgit_query_repo, "tag",
                                    fmt("id=%s", name));
                 html_link_open(url, NULL, NULL);
                 html_txt(name);
                 html_link_close();
                 html("</td><td>");
                 if (info->tagger_date > 0)
                         cgit_print_age(info->tagger_date, -1, NULL);
                 html("</td><td>");
                 if (info->tagger)
                         html(info->tagger);
                 html("</td><td>");
                 cgit_object_link(tag->tagged);
                 html("</td></tr>\n");
         } else {
                 if (!header)
                         print_tag_header();
                 html("<tr><td>");
                 html_txt(name);
                 html("</td><td colspan='2'/><td>");
                 cgit_object_link(ref->object);
                 html("</td></tr>\n");
         }
         return 0;
 }
 
 static int cgit_print_archive_cb(const char *refname, const unsigned char *sha1,
                                  int flags, void *cb_data)
 {
         struct tag *tag;
         struct taginfo *info;
         struct object *obj;
         char buf[256], *url;
         unsigned char fileid[20];
 
         if (prefixcmp(refname, "refs/archives"))
                 return 0;
         strncpy(buf, refname+14, sizeof(buf));
         obj = parse_object(sha1);
         if (!obj)
                 return 1;
         if (obj->type == OBJ_TAG) {
                 tag = lookup_tag(sha1);
                 if (!tag || parse_tag(tag) || !(info = cgit_parse_tag(tag)))
                         return 0;
                 hashcpy(fileid, tag->tagged->sha1);
         } else if (obj->type != OBJ_BLOB) {
                 return 0;
         } else {
                 hashcpy(fileid, sha1);
         }
         if (!header) {
                 html("<table id='downloads'>");
                 html("<tr><th>Downloads</th></tr>");
                 header = 1;
         }
         html("<tr><td>");
         url = cgit_pageurl(cgit_query_repo, "blob",
                            fmt("id=%s&amp;path=%s", sha1_to_hex(fileid),
                                buf));
         html_link_open(url, NULL, NULL);
         html_txt(buf);
         html_link_close();
         html("</td></tr>");
         return 0;
 }
 
 static void cgit_print_branches()
 {
         struct reflist list;
         int i;
 
         html("<tr class='nohover'><th class='left'>Branch</th>"
              "<th class='left'>Idle</th>"
              "<th class='left'>Author</th>"
              "<th class='left'>Head commit</th></tr>\n");
 
         list.refs = NULL;
         list.alloc = list.count = 0;
         for_each_branch_ref(cgit_refs_cb, &list);
         for(i=0; i<list.count; i++)
                 cgit_print_branch(list.refs[i]);
 }
 
 static void cgit_print_tags()
 {
         struct reflist list;
         int i;
 
         header = 0;
         list.refs = NULL;
         list.alloc = list.count = 0;
         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]);
 }
 
 static void cgit_print_archives()
 {
         header = 0;
         for_each_ref(cgit_print_archive_cb, NULL);
         if (header)
                 html("</table>");
 }
 
 void cgit_print_summary()
 {
         html("<div id='summary'>");
         cgit_print_archives();
         html("<h2>");
         html_txt(cgit_repo->name);
         html(" - ");
         html_txt(cgit_repo->desc);
         html("</h2>");
         if (cgit_repo->readme)
                 html_include(cgit_repo->readme);
         html("</div>");
         if (cgit_summary_log > 0)
                 cgit_print_log(cgit_query_head, 0, cgit_summary_log, NULL, NULL, 0);
         html("<table class='list nowrap'>");
         if (cgit_summary_log > 0)
                 html("<tr class='nohover'><td colspan='4'>&nbsp;</td></tr>");
         cgit_print_branches();
         html("<tr class='nohover'><td colspan='4'>&nbsp;</td></tr>");
         cgit_print_tags();
         html("</table>");
 }