Re: [PATCH v3] remotes-hg: bugfix for fetching non local remotes

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On Thu, Jul 25, 2013 at 9:12 PM, Felipe Contreras
<felipe.contreras@xxxxxxxxx> wrote:
> Besides, I don't see
> the point of having a '.shared/.hg' directory, and nothing else on
> that '.shared' folder.

Is it not already true about the ".git/hg/$alias/clone/" directory ?

> So, here's my patch. If only Junio read them.
>
> Subject: [PATCH] remote-hg: add shared repo upgrade
>
> 6796d49 (remote-hg: use a shared repository store) introduced a bug by
> making the shared repository '.git/hg', which is already used before
> that patch, so clones that happened before that patch, fail after that
> patch, because there's no shared Mercurial repo.
>
> It's trivial to upgrade to the new organization by copying the Mercurial
> repo from one of the remotes (e.g. 'origin'), so let's do so.

I agree with you that we should consider migration. But there's
another use-case I think can fail.
What happens with the following:

git clone hg::/my/hg/repo
cd repo && git remote add newremote hg::http://some/hg/url

Git clone will create .git/hg/origin and with no hg clone (because
it's a local repository), and then create marks-file in there.

> Reported-by: Joern Hees <dev@xxxxxxxxxxxx>
> Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
> ---
>  contrib/remote-helpers/git-remote-hg.py | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/contrib/remote-helpers/git-remote-hg.py
> b/contrib/remote-helpers/git-remote-hg.py
> index 0194c67..57a8ec4 100755
> --- a/contrib/remote-helpers/git-remote-hg.py
> +++ b/contrib/remote-helpers/git-remote-hg.py
> @@ -396,6 +396,13 @@ def get_repo(url, alias):
>                  hg.clone(myui, {}, url, shared_path, update=False, pull=True)
>              except:
>                  die('Repository error')
> +        else:
> +            # check and upgrade old organization
> +            hg_path = os.path.join(shared_path, '.hg')
> +            if not os.path.exists(hg_path):
> +                repos = os.listdir(shared_path)
> +                local_hg = os.path.join(shared_path, repos[0], 'clone', '.hg')
> +                shutil.copytree(local_hg, hg_path)

With the use-case I described above, I think shutil.copytree() would
raise an exception because local_hg doesn't exist.
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