From: Santiago Torres <santi...@nyu.edu>

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 <santi...@nyu.edu>
---
 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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