To: Steve French <smfrench@austin.rr.com>
cc: git@vger.kernel.org
Subject: Re: sending changesets from the middle of a git tree
+Abstract: In this article, Linus demonstrates how a broken commit
+ in a sequence of commits can be removed by rewinding the head and
+ reapplying selected changes.
On Sat, 13 Aug 2005, Linus Torvalds wrote:
-> That's correct. Same things apply: you can move a patch over, and create a
-> new one with a modified comment, but basically the _old_ commit will be
+> That's correct. Same things apply: you can move a patch over, and create a
+> new one with a modified comment, but basically the _old_ commit will be
> immutable.
Let me clarify.
You can entirely _drop_ old branches, so commits may be immutable, but
-nothing forces you to keep them. Of course, when you drop a commit, you'll
-always end up dropping all the commits that depended on it, and if you
-actually got somebody else to pull that commit you can't drop it from
+nothing forces you to keep them. Of course, when you drop a commit, you'll
+always end up dropping all the commits that depended on it, and if you
+actually got somebody else to pull that commit you can't drop it from
_their_ repository, but undoing things is not impossible.
For example, let's say that you've made a mess of things: you've committed
# for reference
git branch broken
- # Reset the main branch to three parents back: this
+ # Reset the main branch to three parents back: this
# effectively undoes the three top commits
git reset HEAD^^^
git checkout -f
to see that everything looks sensible.
-And then, you can just remove the broken branch if you decide you really
+And then, you can just remove the broken branch if you decide you really
don't want it:
# remove 'broken' branch
- rm .git/refs/heads/broken
+ git branch -d broken
# Prune old objects if you're really really sure
git prune
-And yeah, I'm sure there are other ways of doing this. And as usual, the
-above is totally untested, and I just wrote it down in this email, so if
+And yeah, I'm sure there are other ways of doing this. And as usual, the
+above is totally untested, and I just wrote it down in this email, so if
I've done something wrong, you'll have to figure it out on your own ;)
Linus
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