verify-tag: share code with verify-commit

verify-tag was executing an entirely different codepath than
verify-commit, except for the underlying verify_signed_buffer.  Move
much of the code from check_commit_signature to a generic
check_signature function and adjust both codepaths to call it.

Update verify-tag to explicitly output the signature text, as we now
call verify_signed_buffer with strbufs to catch the output, which
prevents it from being printed automatically.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 14 deletions

diff --git a/commit.c b/commit.c
index a8c7577d28..d07a984985 100644
--- a/commit.c
+++ b/commit.c
@@ -1231,27 +1231,14 @@ void check_commit_signature(const struct commit *commit, struct signature_check
 {
 	struct strbuf payload = STRBUF_INIT;
 	struct strbuf signature = STRBUF_INIT;
-	struct strbuf gpg_output = STRBUF_INIT;
-	struct strbuf gpg_status = STRBUF_INIT;
-	int status;
 
 	sigc->result = 'N';
 
 	if (parse_signed_commit(commit, &payload, &signature) <= 0)
 		goto out;
-	status = verify_signed_buffer(payload.buf, payload.len,
-				      signature.buf, signature.len,
-				      &gpg_output, &gpg_status);
-	if (status && !gpg_output.len)
-		goto out;
-	sigc->payload = strbuf_detach(&payload, NULL);
-	sigc->gpg_output = strbuf_detach(&gpg_output, NULL);
-	sigc->gpg_status = strbuf_detach(&gpg_status, NULL);
-	parse_gpg_output(sigc);
+	check_signature(payload.buf, payload.len, signature.buf, signature.len, sigc);
 
  out:
-	strbuf_release(&gpg_status);
-	strbuf_release(&gpg_output);
 	strbuf_release(&payload);
 	strbuf_release(&signature);
 }