"git tag -u keyname" broken

Commit 396865859918e9c7bf8ce74aae137c57da134610 broke signed tags using
the "-u" flag when it made builtin-tag.c use parse_options() to parse its
arguments (but it quite possibly was broken even before that, by the
builtin rewrite).

It used to be that passing the signing ID with the -u parameter also
(obviously!) implied that you wanted to sign and annotate the tag, but
that logic got dropped. It also totally ignored the actual key ID that was
passed in.

This reinstates it all.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/builtin-tag.c b/builtin-tag.c
index 517419fd3d..274901a408 100644
--- a/builtin-tag.c
+++ b/builtin-tag.c
@@ -236,14 +236,18 @@ static const char tag_template[] =
 	"# Write a tag message\n"
 	"#\n";
 
+static void set_signingkey(const char *value)
+{
+	if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
+		die("signing key value too long (%.10s...)", value);
+}
+
 static int git_tag_config(const char *var, const char *value)
 {
 	if (!strcmp(var, "user.signingkey")) {
 		if (!value)
 			die("user.signingkey without value");
-		if (strlcpy(signingkey, value, sizeof(signingkey))
-						>= sizeof(signingkey))
-			die("user.signingkey value too long");
+		set_signingkey(value);
 		return 0;
 	}
 
@@ -396,6 +400,10 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, options, git_tag_usage, 0);
 
+	if (keyid) {
+		sign = 1;
+		set_signingkey(keyid);
+	}
 	if (sign)
 		annotate = 1;