ui-shared: use the same snapshot logic as ui-refs

Make snapshot links in the commit UI use the same prefix algorithm as
those in the summary UI, so that refs starting with the snapshot prefix
are used as-is rather than composed with the prefix repeated.

Signed-off-by: John Keeping <john@keeping.me.uk>
Reviewed-by: Christian Hesse <mail@eworm.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/ui-shared.c b/ui-shared.c
index 8ae81d2..50a168d 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -1115,9 +1115,15 @@ void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref)
 {
         const struct cgit_snapshot_format* f;
         struct strbuf filename = STRBUF_INIT;
+        const char *basename;
         size_t prefixlen;
 
-        cgit_compose_snapshot_prefix(&filename, cgit_snapshot_prefix(repo), ref);
+        basename = cgit_snapshot_prefix(repo);
+        if (starts_with(ref, basename))
+                strbuf_addstr(&filename, ref);
+        else
+                cgit_compose_snapshot_prefix(&filename, basename, ref);
+
         prefixlen = filename.len;
         for (f = cgit_snapshot_formats; f->suffix; f++) {
                 if (!(repo->snapshots & f->bit))