[PATCH v5 5/6] builtin/verify-tag: move verification code to tag.c

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From: Santiago Torres <santiago@xxxxxxx>

The PGP verification routine for tags could be accessed by other
commands that require it. We do this by moving it to the common tag.c
module. We rename the verify_tag() function to gpg_verify_tag() to avoid
conflicts with the mktag.c function.

Signed-off-by: Santiago Torres <santiago@xxxxxxx>
---
 builtin/verify-tag.c | 50 +-------------------------------------------------
 tag.c                | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 tag.h                |  1 +
 3 files changed, 50 insertions(+), 49 deletions(-)

diff --git a/builtin/verify-tag.c b/builtin/verify-tag.c
index 7a7c376..e9a2005 100644
--- a/builtin/verify-tag.c
+++ b/builtin/verify-tag.c
@@ -18,54 +18,6 @@ static const char * const verify_tag_usage[] = {
 		NULL
 };
 
-static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
-{
-	struct signature_check sigc;
-	int payload_size;
-	int ret;
-
-	memset(&sigc, 0, sizeof(sigc));
-
-	payload_size = parse_signature(buf, size);
-
-	if (size == payload_size) {
-		if (flags & GPG_VERIFY_VERBOSE)
-			write_in_full(1, buf, payload_size);
-		return error("no signature found");
-	}
-
-	ret = check_signature(buf, payload_size, buf + payload_size,
-				size - payload_size, &sigc);
-	print_signature_buffer(&sigc, flags);
-
-	signature_check_clear(&sigc);
-	return ret;
-}
-
-static int verify_tag(const unsigned char *sha1, unsigned flags)
-{
-	enum object_type type;
-	char *buf;
-	char *hex_sha1;
-	unsigned long size;
-	int ret;
-
-	hex_sha1 = sha1_to_hex(sha1);
-	type = sha1_object_info(sha1, NULL);
-	if (type != OBJ_TAG)
-		return error("%s: cannot verify a non-tag object of type %s.",
-				hex_sha1, typename(type));
-
-	buf = read_sha1_file(sha1, &type, &size);
-	if (!buf)
-		return error("%s: unable to read file.", hex_sha1);
-
-	ret = run_gpg_verify(buf, size, flags);
-
-	free(buf);
-	return ret;
-}
-
 static int git_verify_tag_config(const char *var, const char *value, void *cb)
 {
 	int status = git_gpg_config(var, value, cb);
@@ -103,7 +55,7 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
 			had_error = 1;
 			continue;
 		}
-		if (verify_tag(sha1, flags))
+		if (gpg_verify_tag(sha1, flags))
 			had_error = 1;
 	}
 	return had_error;
diff --git a/tag.c b/tag.c
index d72f742..3f7669f 100644
--- a/tag.c
+++ b/tag.c
@@ -6,6 +6,54 @@
 
 const char *tag_type = "tag";
 
+static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
+{
+	struct signature_check sigc;
+	int payload_size;
+	int ret;
+
+	memset(&sigc, 0, sizeof(sigc));
+
+	payload_size = parse_signature(buf, size);
+
+	if (size == payload_size) {
+		if (flags & GPG_VERIFY_VERBOSE)
+			write_in_full(1, buf, payload_size);
+		return error("no signature found");
+	}
+
+	ret = check_signature(buf, payload_size, buf + payload_size,
+				size - payload_size, &sigc);
+	print_signature_buffer(&sigc, flags);
+
+	signature_check_clear(&sigc);
+	return ret;
+}
+
+int gpg_verify_tag(const unsigned char *sha1, unsigned flags)
+{
+	enum object_type type;
+	char *buf;
+	char *hex_sha1;
+	unsigned long size;
+	int ret;
+
+	hex_sha1 = sha1_to_hex(sha1);
+	type = sha1_object_info(sha1, NULL);
+	if (type != OBJ_TAG)
+		return error("%s: cannot verify a non-tag object of type %s.",
+				hex_sha1, typename(type));
+
+	buf = read_sha1_file(sha1, &type, &size);
+	if (!buf)
+		return error("%s: unable to read file.", hex_sha1);
+
+	ret = run_gpg_verify(buf, size, flags);
+
+	free(buf);
+	return ret;
+}
+
 struct object *deref_tag(struct object *o, const char *warn, int warnlen)
 {
 	while (o && o->type == OBJ_TAG)
diff --git a/tag.h b/tag.h
index f4580ae..cb643b9 100644
--- a/tag.h
+++ b/tag.h
@@ -17,5 +17,6 @@ extern int parse_tag_buffer(struct tag *item, const void *data, unsigned long si
 extern int parse_tag(struct tag *item);
 extern struct object *deref_tag(struct object *, const char *, int);
 extern struct object *deref_tag_noverify(struct object *);
+extern int gpg_verify_tag(const unsigned char *sha1, unsigned flags);
 
 #endif /* TAG_H */
-- 
2.8.0

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