Problems updating gcc git mirror clone

[Markus Trippelsdorf]

On 2015.03.10 at 18:48 +0100, Andrey Gursky wrote:
> Dear list members,
> 
> On March 4 it was the last time I was able successfully to update my
> local clone of gcc git mirror, which has been setup as described in
> [1].
> 
> $ git pull --rebase
> From git://gcc.gnu.org/git/gcc
>    7628458..79bac32  trunk      -> svn/trunk
>    f379260..0417bef  gcc-4_8-branch -> origin/gcc-4_8-branch
>    42a9765..b0ec7b6  gcc-4_9-branch -> origin/gcc-4_9-branch
>    7628458..79bac32  master     -> origin/master
>    7628458..79bac32  trunk      -> origin/trunk
>    4e11d32..69d7068  ARM        -> svn/ARM
>    b3d2c22..16d26e1  c++-delayed-folding -> svn/c++-delayed-folding
>    f379260..0417bef  gcc-4_8-branch -> svn/gcc-4_8-branch
>    42a9765..b0ec7b6  gcc-4_9-branch -> svn/gcc-4_9-branch
>    101f03f..2d017af  google     -> svn/google
>    7ec246e..689171f  gupc       -> svn/gupc
>    9d2feef..6a9948a  ibm        -> svn/ibm
>    d5bea86..ee7a90e  redhat     -> svn/redhat
>  * [new ref]         ttype3     -> svn/ttype3
> First, rewinding head to replay your work on top of it...
> Fast-forwarded trunk to 79bac32ec3283a9a73faeec11b8d905e4cf1445a.
> $
> 
> The next time I did update on March 7 and it failed:
> 
> $ git pull --rebase
> From git://gcc.gnu.org/git/gcc
>    79bac32..74eacc0  trunk      -> svn/trunk
>    0417bef..5adbe99  gcc-4_8-branch -> origin/gcc-4_8-branch
>    b0ec7b6..e510458  gcc-4_9-branch -> origin/gcc-4_9-branch
> error: 'refs/remotes/origin/hjl/pie' exists; cannot create
> 'refs/remotes/origin/hjl/pie/gcc-4_9-branch'
>  ! [new branch]      hjl/pie/gcc-4_9-branch ->
> origin/hjl/pie/gcc-4_9-branch  (unable to update local ref)
> error: 'refs/remotes/origin/hjl/pie' exists; cannot create
> 'refs/remotes/origin/hjl/pie/master'
>  ! [new branch]      hjl/pie/master -> origin/hjl/pie/master  (unable
> to update local ref)
>  * [new branch]      hjl/pr65248 -> origin/hjl/pr65248
>    79bac32..74eacc0  master     -> origin/master
>    79bac32..74eacc0  trunk      -> origin/trunk
>    0417bef..5adbe99  gcc-4_8-branch -> svn/gcc-4_8-branch
>    b0ec7b6..e510458  gcc-4_9-branch -> svn/gcc-4_9-branch
>    fe83068..b315806  linaro     -> svn/linaro
> error: some local refs could not be updated; try running
>  'git remote prune origin' to remove any old, conflicting branches
> $
> 
> Is it a "normal" behavior for git clone of a svn repository or it's
> something wrong?

You can also just ignore all these branches by telling git to track just
the ones you're interested in, e.g. (.git/config):

[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = git+ssh://trippels@gcc.gnu.org/git/gcc.git
	fetch = refs/heads/trunk:refs/remotes/origin/trunk
	fetch = refs/heads/gcc-4_8-branch:refs/remotes/origin/gcc-4_8-branch
	fetch = refs/heads/gcc-4_9-branch:refs/remotes/origin/gcc-4_9-branch
[branch "gcc-4.8"]
	remote = origin
	merge = refs/heads/gcc-4_8-branch
[svn-remote "svn"]
	url = svn+ssh://trippels@gcc.gnu.org/svn/gcc
	fetch = trunk:refs/remotes/origin/trunk
	fetch = branches/gcc-4_8-branch:refs/remotes/origin/gcc-4_8-branch
	fetch = branches/gcc-4_9-branch:refs/remotes/origin/gcc-4_9-branch
[branch "gcc-4.9"]
	remote = origin
	merge = refs/heads/gcc-4_9-branch
[branch "trunk"]
	remote = origin
	merge = refs/heads/trunk

-- 
Markus