[PATCH] git fetch one tag only

From: cheng renquan <crquan@gmail.com>
Date: Jun 7, 2012, 01:40 UTC
Message-ID: <CAH5vBdK_M+7Hjk=juVeP7Phqvs2+npknFD-=45OVR032k5S-0A@mail.gmail.com>

Someone maybe like me is working in the way of following one central
git repository
while sometimes need to fetch some code or tags from a 3rd git repo,
but unfortunately the 3rd repo may contain a lot of tags not all I want
to fetch to mess up my local repo, at this time I want to fetch only one tag
from the 3rd repo, but the syntax of
  `git fetch 3rd-repo the-tag-name`

really fetched the code of the-tag-name from 3rd-repo, but forgot the tag itself; this patch enhanced the above syntax to create the tag itself;

 builtin/fetch.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index bb9a074..9a3ec4a 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -439,6 +439,14 @@ static int store_updated_refs(const char
*raw_url, const char *remote_name,
 			else if (!prefixcmp(rm->name, "refs/tags/")) {
 				kind = "tag";
 				what = rm->name + 10;
+				if (!ref) {
+					unsigned char sha1[20];
+					ref = alloc_ref(rm->name);
+					hashcpy(ref->new_sha1, rm->old_sha1);
+					if (!get_sha1(rm->name, sha1))
+						hashcpy(ref->old_sha1, sha1);
+				}
 			}
 			else if (!prefixcmp(rm->name, "refs/remotes/")) {
 				kind = "remote-tracking branch";

-- 
cheng renquan (程任全)