Re: Git shouldn't allow to push a new branch called HEAD

> On Fri, 2011-10-14 at 13:31 +0200, Daniele Segato wrote:
> > Hi all,
> > 
> > 
> > following from a discussion in IRC freenode #git between me, sitaram an
> > shruggar
> > 
> > 
> > step to reproduce:
> > 
> > $ mkdir /tmp/gitbug
> > $ cd /tmp/gitbug/
> > 
> > $ # create a fake remote repo
> > $ git init --bare remote.git
> > 
> > $ # clone it with the user that will generate the bug
> > $ git clone remote.git buggenerator
> > $ cd buggenerator/
> > $ touch whatever
> > $ git add .
> > $ git commit -m "first commit"
> > $ git push origin master 
> > 
> > $ # now clone the same repo the other guy is the "victim" of this issue
> > $ cd ..
> > $ git clone remote.git victim
> > 
> > $ # time to create the remote HEAD branch
> > $ cd buggenerator/
> > $ git push origin HEAD:HEAD
> > 
> > $ # the remote refs has been created!
> > $ git ls-remote
> > 
> > $ # another commit
> > $ echo 'any change' >> whatever 
> > $ git commit -a -m "some change"
> > $ git push origin master 
> > 
> > $ # the refs/heads/HEAD is still where it was
> > $ git ls-remote
> > 
> > $ # now from the victim perspective
> > $ cd ../victim/
> > 
> > $ # every time executing a fetch he will get a force update
> > $ # or maybe even an error, seen it my real repo, don't know how
> > $ # to reproduce
> > $ git fetch 
> > $ git fetch 
> > $ git ls-remote
> > $ git fetch 
> > $ git ls-remote
> > $ git branch -a
> 
> This should also help understanding what happen in the "victim" local
> repo at every fetch:
> 
> mastro@mastroc3 /tmp/gitbug/victim (master) $ git br -av
> * master                11d0a12 [behind 1] first commit
>   remotes/origin/HEAD   -> origin/master
>   remotes/origin/master 77852ef some change
> mastro@mastroc3 /tmp/gitbug/victim (master) $ git fetch 
> From /tmp/gitbug/remote
>  + 77852ef...11d0a12 HEAD       -> origin/HEAD  (forced update)
> mastro@mastroc3 /tmp/gitbug/victim (master) $ git br -av
> * master                11d0a12 first commit
>   remotes/origin/HEAD   -> origin/master
>   remotes/origin/master 11d0a12 first commit