On Tue, Sep 15, 2009 at 12:31 PM, Howard Miller
<howard@xxxxxxxxxxxxxxxxxxx> wrote:
> I am resurrecting a discussion from a week or two back (been on
> holiday). As follows...
>
> I had made some changes to some files and then done a commit. Only
> then did I realise that I had the wrong branch checked out. To make
> matters worse I then did a 'git reset HEAD^' which means that I can
> now no longer switch branches. I am stuck. I had some advice (thanks!)
> but it was not complete. I'd appreciate some more help.
Hi Howard,
just to make sure I understand your issue
1 - you were on branch X, thinking your were on branch Y
2 - edit, diff, commit, realised the mistake
3 - git reset HEAD^
so if you now run `git status` and `git diff` it will show your
changes as if they were uncommitted and unstaged.
(Before you start with various attempts to recover below, a great
trick is to make an instant-backup in case things go wrong: cd .. / ;
cp -pr moodle.git moodle-backup.git ; cd moodle.git )
You can now try do do
4 - git checkout Y
and if the changes are on files that don't change between X and Y,
then git will change the branches and keep your changes there. If the
files are different between X and Y, it won't work.
What I can recommend is to save your patch, as follows
5 - git diff > tempchanges.patch
6 - git reset --hard # this will discard your changes, careful
7 - git checkout Y
8 - patch -p1 < tempchanges.patch
The patch may not apply cleanly :-) -- note that patch is more
tolerant of iffy merges than git's internal implementation ("git
apply") -- so it will succeed more often... but the results need
review.
There is a more git-style approach that is to use git-stash -- it uses
git-apply and may not do what you want. The steps are
5a - git stash # will save your changed files into a "stashed commit"
and clear out the changes from your working copy
6a - git checkout Y
7a - git stash apply
hth,
m
--
martin.langhoff@xxxxxxxxx
martin@xxxxxxxxxx -- School Server Architect
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