ui-repolist.c: sort by section name, repo name as default

When no sorting is requested by the client, cgit will now sort by
section name followed by repo name. This allows repos to be registered/
discovered independently of their display order.

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

ui-repolist.c

@@ -136,6 +136,18 @@ static int cmp(const char *s1, const char *s2)
 	return 0;
 }
 
+static int sort_section(const void *a, const void *b)
+{
+	const struct cgit_repo *r1 = a;
+	const struct cgit_repo *r2 = b;
+	int result;
+
+	result = cmp(r1->section, r2->section);
+	if (!result)
+		result = cmp(r1->name, r2->name);
+	return result;
+}
+
 static int sort_name(const void *a, const void *b)
 {
 	const struct cgit_repo *r1 = a;
@@ -178,6 +190,7 @@ struct sortcolumn {
 };
 
 struct sortcolumn sortcolumn[] = {
+	{"section", sort_section},
 	{"name", sort_name},
 	{"desc", sort_desc},
 	{"owner", sort_owner},
@@ -219,6 +232,8 @@ void cgit_print_repolist()
 
 	if(ctx.qry.sort)
 		sorted = sort_repolist(ctx.qry.sort);
+	else
+		sort_repolist("section");
 
 	html("<table summary='repository list' class='list nowrap'>");
 	for (i=0; i<cgit_repolist.count; i++) {