snapshot: support tar signature for compressed tar

This adds support for kernel.org style signatures where the uncompressed
tar archive is signed and compressed later. The signature is valid for
all tar* snapshots.

We have a filter which snapshots may be generated and downloaded. This has
to allow tar signatures now even if tar itself is not allowed. To simplify
things we allow all signatures.

Signed-off-by: Christian Hesse <mail@eworm.de>

1 files changed, 8 insertions, 1 deletions

diff --git a/ui-shared.c b/ui-shared.c
index 9a2e382..066a470 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -1114,7 +1114,7 @@ void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
                                const char *separator)
 {
-        const struct cgit_snapshot_format* f;
+        const struct cgit_snapshot_format *f;
         struct strbuf filename = STRBUF_INIT;
         const char *basename;
         size_t prefixlen;
@@ -1139,6 +1139,13 @@ void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
                                            filename.buf);
                         html(")");
+                } else if (starts_with(f->suffix, ".tar") && cgit_snapshot_get_sig(ref, &cgit_snapshot_formats[0])) {
+                        strbuf_setlen(&filename, strlen(filename.buf) - strlen(f->suffix));
+                        strbuf_addstr(&filename, ".tar.asc");
+                        html(" (");
+                        cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
+                                           filename.buf);
+                        html(")");
                 }
                 html(separator);
         }