Re: Advices to imlement update hook

> Hi !
> 
> I'd like to restrict access to one of my repos: the project tracked by
> it has several directories: a/ b/ c/ and I'd like to allow only
> modifications happen in b/ directory.
> 
> I'm planning to use git hooks, not sure which one I should use: if the
> check should happen at the commit or push time or both.
> 
> For now I'm going to use the update hook, so it will happen when pushing.
> 
> Now the question is: what is the best way to do this ?
> 
> I'm planning to use something equivalent to "git-diff-tree oldref
> newref | { grep -v b || exit 1; }" but doesn't look like the best git
> way.
> 
> BTW, from the git-diff-tree manpage:
> 
> 	<path>...
> 	    If provided, the results are limited to a subset of
> 	    files matching one of these prefix strings. i.e., file
> 	    matches /^<pattern1>|<pattern2>|.../ Note that this
> 	    parameter does not provide any wildcard or regexp
> 	    features.
> 
> What does it mean exactly ? what does 'pattern' word mean if wildcard
> or regexp is not supported ?
> I also tried:
> 
>    git diff-tree <oldref> <newref> -- ^b || exit 1
> 
> but it doesn't work.