KDE 4.7.2 (try#1) uploaded
Jonathan Callen
abcd at gentoo.org
Mon Oct 10 04:33:17 UTC 2011
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On 10/08/2011 06:21 PM, Andreas Pakulat wrote:
> On 08.10.11 15:24:57, Nicolas Alvarez wrote:
>> Andreas Pakulat wrote:
>>
>>> On 08.10.11 01:10:50, Nicolas Alvarez wrote:
>>>> Andras Mantia wrote:
>>>>> On Sunday, October 02, 2011 17:04:42 Dirk Mueller wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I just finished uploading KDE 4.7.2 tarballs. Unlike
>>>>>> previous tarballs, these have been consistently taken
>>>>>> from KDE/4.7 branch in git.
>>>>>
>>>>> What does this mean, no 4.7.2 tag was created in git? I
>>>>> don't see anything like that with "git tag" in kdepim and
>>>>> would like to check if some bugfix made into 4.7.2 or not.
>>>>> dc60f1116dad12fbdd443a964d58eec7e5ed09fc (kdepim-runtime)
>>>>> 84edd007f903763b61296a84768e2f4c9f98113a (kdepimlibs)
>>>>
>>>> Tags are created *after* the tarballs. If packagers find
>>>> problems in a non-final tarball, Dirk can release a new one,
>>>> but tags are immutable, so they should be created only once
>>>> we're sure everything is okay.
>>>
>>> Sorry thats wrong:
>>>
>>> git tag -a 4.7.2 <edit source file> git commit -a -m "Blah" git
>>> tag -f -a 4.7.2
>>>
>>> works just fine and you can push the result without needing
>>> the force-parameter as long as the commit the tag points to now
>>> is a successor of the one it pointed to before.
>>
>> As far as I know, that's not the case for annotated tags. If a
>> tag points at a commit A, it can be updated to commit B if A is
>> an ancestor of B. But if the tag points at an annotated tag
>> object which in turn points at commit A, you can't update it at
>> all. There is nothing that can be a successor of the tag object.
>
> Did you actually try it out? I've done this twice in the last 4
> weeks at work and did not run into any problems. And neither did I
> when I tried right now :)
>
> Andreas
>
That works very well *until the tag is pushed*. Once the tag has been
pushed, if you try and push a changed tag, anyone that pulled the repo
with the old tag *will not see the tag change*. This behavior is by
design, the following excerpt from git-tag(1) explains why:
On Re-tagging
What should you do when you tag a wrong commit and you would
want to re-tag?
If you never pushed anything out, just re-tag it. Use "-f" to
replace the old one. And you’re done.
But if you have pushed things out (or others could just read
your repository directly), then others will have already seen
the old tag. In that case you can do one of two things:
1. The sane thing. Just admit you screwed up, and use a
different name. Others have already seen one tag-name, and if
you keep the same name, you may be in the situation that two
people both have "version X", but they actually have
_different_ "X"'s. So just call it "X.1" and be done with it.
2. The insane thing. You really want to call the new version
"X" too, _even though_ others have already seen the old one.
So just use `git tag -f again`, as if you hadn’t already
published the old one.
However, Git does *not* (and it should not) change tags behind
users back. So if somebody already got the old tag, doing a `git
pull` on your tree shouldn’t just make them overwrite the old
one.
If somebody got a release tag from you, you cannot just change
the tag for them by updating your own one. This is a big
security issue, in that people MUST be able to trust their
tag-names. If you really want to do the insane thing, you need
to just fess up to it, and tell people that you messed up. You
can do that by making a very public announcement saying:
Ok, I messed up, and I pushed out an earlier version tagged
as X. I then fixed something, and retagged the *fixed* tree
as X again.
If you got the wrong tag, and want the new one, please delete
the old one and fetch the new one by doing:
git tag -d X
git fetch origin tag X
to get my updated tag.
You can test which tag you have by doing
git rev-parse X
which should return 0123456789abcdef.. if you have the new
version.
Sorry for the inconvenience.
Does this seem a bit complicated? It *should* be. There is no way
that it would be correct to just "fix" it automatically. People
need to know that their tags might have been changed.
[end excerpt]
- --
Jonathan Callen
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