[PATCH v6 4/6] verify-tag: add sha1 argument to verify_tag()

[santiago@nyu.edu]

From: Santiago Torres <santiago@nyu.edu>

The current interface of verify_tag() resolves reference names to SHA1,
which might be redundant as future callers may resolve the refname to
SHA1 beforehand.

Add a SHA1 parameter to use instead of the name parameter. We also
replace the name argument to report_name and use it for error reporting
only.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Santiago Torres <santiago@nyu.edu>
---
 builtin/verify-tag.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/builtin/verify-tag.c b/builtin/verify-tag.c
index 010353c..1d1c5c2 100644
--- a/builtin/verify-tag.c
+++ b/builtin/verify-tag.c
@@ -42,25 +42,24 @@ static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
 	return ret;
 }
 
-static int verify_tag(const char *name, unsigned flags)
+static int verify_tag(const unsigned char *sha1, const char *report_name,
+			unsigned flags)
 {
 	enum object_type type;
-	unsigned char sha1[20];
 	char *buf;
 	unsigned long size;
 	int ret;
 
-	if (get_sha1(name, sha1))
-		return error("tag '%s' not found.", name);
-
 	type = sha1_object_info(sha1, NULL);
 	if (type != OBJ_TAG)
 		return error("%s: cannot verify a non-tag object of type %s.",
-				name, typename(type));
+				report_name ? report_name : find_unique_abbrev(sha1, DEFAULT_ABBREV),
+				typename(type));
 
 	buf = read_sha1_file(sha1, &type, &size);
 	if (!buf)
-		return error("%s: unable to read file.", name);
+		return error("%s: unable to read file.",
+				report_name ? report_name : find_unique_abbrev(sha1, DEFAULT_ABBREV));
 
 	ret = run_gpg_verify(buf, size, flags);
 
@@ -80,6 +79,8 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
 {
 	int i = 1, verbose = 0, had_error = 0;
 	unsigned flags = 0;
+	unsigned char sha1[20];
+	const char *name;
 	const struct option verify_tag_options[] = {
 		OPT__VERBOSE(&verbose, N_("print tag contents")),
 		OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
@@ -96,8 +97,14 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
 	if (verbose)
 		flags |= GPG_VERIFY_VERBOSE;
 
-	while (i < argc)
-		if (verify_tag(argv[i++], flags))
+	while (i < argc) {
+		name = argv[i++];
+		if (get_sha1(name, sha1)) {
+			error("tag '%s' not found.", name);
 			had_error = 1;
+		}
+		else if (verify_tag(sha1, name, flags))
+			had_error = 1;
+	}
 	return had_error;
 }
-- 
2.8.0