[PATCH 1/1] snapshot: support tar signature for compressed tar

[list at eworm.de (Christian Hesse)]

From: Christian Hesse <mail at eworm.de>

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.

Signed-off-by: Christian Hesse <mail at eworm.de>
---
 ui-shared.c   | 8 ++++++++
 ui-snapshot.c | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/ui-shared.c b/ui-shared.c
index 8a786e0..40935ae 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -1139,6 +1139,14 @@ 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 (f->bit & 0x16 && cgit_snapshot_get_sig(ref, &cgit_snapshot_formats[3])) {
+			int suf_len = strlen(f->suffix);
+			strbuf_remove(&filename, strlen(filename.buf) - suf_len, suf_len);
+			strbuf_addstr(&filename, ".tar.asc");
+			html(" (");
+			cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
+					   filename.buf);
+			html(")");
 		}
 		html(separator);
 	}
diff --git a/ui-snapshot.c b/ui-snapshot.c
index c7611e8..76d0573 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -263,7 +263,7 @@ void cgit_print_snapshot(const char *head, const char *hex,
 	}
 
 	f = get_format(filename);
-	if (!f || !(ctx.repo->snapshots & f->bit)) {
+	if (!f || (!sig_filename && !(ctx.repo->snapshots & f->bit))) {
 		cgit_print_error_page(400, "Bad request",
 				"Unsupported snapshot format: %s", filename);
 		return;