Re: [PATCH] checkout: add 'pre-checkout' hook

[Sam Vilain <sam.vilain@catalyst.net.nz>]

Jeff King wrote:
>> Add a simple hook that will run before checkouts.
> 
> What is the use case that makes it useful as a hook, and not simply as
> something people can do before running checkout?
> 
> I guess you can use it to block a checkout, but only after finding out
> _what_ you are going to checkout, but an exact use case escapes me.

Right.  Yes, this could be explained more.

Actually the use case is submodules.  When switching branches, the user
wants to add a hook to remove submodules.  However post-checkout is too
late, because the index and the .gitmodules file do not record the
submodule locations.

Of course the best explanation is a test case :) I'll look at cooking
one up.
-- 
Sam Vilain, Perl Hacker, Catalyst IT (NZ) Ltd.
phone: +64 4 499 2267        PGP ID: 0x66B25843