Re: git-pull and tag objects

[Junio C Hamano <junkio@cox.net>]

Linus Torvalds <torvalds@linux-foundation.org> writes:

> On Sun, 11 Feb 2007, Junio C Hamano wrote:
>> 
>> Well, what you are saying is that it used to be Ok in Jul 5 2005
>> version but with tag following it is not Ok anymore, isn't it?
>
> Do we actually do it with automatic tag following? I tested, and it didn't 
> do anything bad for me.

You are right.

The only iffy case that is remaining is "git fetch --tags $URL".
The user is explicitly saying "I want all tags from there", but
the user may not be expecting tags that are already present in
the local repository to be overwritten.

The filtering on the auto-follow codepath Johannes added with
"git-show-ref --exclude-existing" would fix this case as well.

-- >8 --
[PATCH] "git-fetch --tags $URL" should not overwrite existing tags

Use the same --exclude-existing filter as we use for automatic
tag following to avoid overwriting existing tags with replacement
ones the other side created.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
diff --git a/git-fetch.sh b/git-fetch.sh
index 357cac2..ca984e7 100755
--- a/git-fetch.sh
+++ b/git-fetch.sh
@@ -253,23 +253,10 @@ if test "$tags"
 then
 	taglist=`IFS='	' &&
 		  echo "$ls_remote_result" |
+		  git-show-ref --exclude-existing=refs/tags/ |
 	          while read sha1 name
 		  do
-			case "$sha1" in
-			fail)
-				exit 1
-			esac
-			case "$name" in
-			*^*) continue ;;
-			refs/tags/*) ;;
-			*) continue ;;
-			esac
-		  	if git-check-ref-format "$name"
-			then
-			    echo ".${name}:${name}"
-			else
-			    echo >&2 "warning: tag ${name} ignored"
-			fi
+			echo ".${name}:${name}"
 		  done` || exit
 	if test "$#" -gt 1
 	then