Re: GCC Git hooks

[Joseph Myers <joseph@codesourcery.com>]

On Mon, 16 Sep 2019, Joel Brobecker wrote:

> Looking at the configuration file, I believe the git-hooks
> should have most, if not all, of the features that would be needed for
> the GCC repository. In particular, there is already a way to relay
> commits to third-party tools via calling of a script; GDB uses that
> to interface with their Bugzilla database.

I am now looking at the hook setup for GCC.  As far as I can see, I'll 
initially need a GCC-specific fork of the hooks for two reasons:

* Custom ref naming.  The refs/vendors/<vendor>/{heads,tags} and 
refs/users/<user>/{heads,tags} scheme described at 
<https://gcc.gnu.org/ml/gcc/2019-11/msg00249.html>, to avoid such branches 
being fetched by default, will need the hooks to know that such ref names 
are to be treated as branches / tags, and to allow non-fast-forward pushes 
to them.

* I don't see a configuration option to add custom checks before accepting 
a ref update.  I think we want a custom check that prevents people for 
accidentally pushing merges between the old and new versions of the GCC 
history.  It's easy to write something called from a pre-receive / update 
hook that uses git rev-list to identify problem pushes, but doing that 
without a fork of the hooks would require a suitable configuration option 
to call out to such a custom script.

-- 
Joseph S. Myers
joseph@codesourcery.com