Subject: Re: [PATCH v1] git-send-email: Respect core.hooksPath setting

From: Ævar Arnfjörð Bjarmason <[email-masked]>
Date: Mon, 22 Mar 2021 17:46:25 +0100

On Mon, Mar 22 2021, Robert Foss wrote:

> get-send-email currently makes the assumption that the
> 'sendemail-validate' hook exists inside of the repository.
>
> Since the introduction of `core.hooksPath` configuration option in
> v2.9, this is no longer true.
>
> Instead of assuming a hardcoded repo relative path, query
> git for the actual path of the hooks directory.
>
> Signed-off-by: Robert Foss <[email-masked]>
> ---
>
>
> This patch does not include a test for this bug fix.
> This is entirely due to me not being able to think up a way
> to test this. So I'm very much open to suggestions.

There's an "invoke hook" test in t9001-send-email.sh which should be
easy to tweak (or mostly copy/pasted to another test) to run the same
way once the hook is moved from .git/hooks to somedir/ and -c
core.hooksPath=somedir is set.

>  git-send-email.perl | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/git-send-email.perl b/git-send-email.perl
> index 1f425c0809..3934dceb70 100755
> --- a/git-send-email.perl
> +++ b/git-send-email.perl
> @@ -1942,8 +1942,9 @@ sub validate_patch {
>  	my ($fn, $xfer_encoding) = @_;
>  
>  	if ($repo) {
> -		my $validate_hook = catfile(catdir($repo->repo_path(), 'hooks'),
> -					    'sendemail-validate');
> +		my $hook_path = $repo->command('rev-parse', '--git-path', 'hooks');
> +		chomp($hook_path);
> +		my $validate_hook = catfile($hook_path, 'sendemail-validate');

This looks like it work, small nits:

1. This would be better in perl/Git.pm, it already has various accessors
   etc. for these rev-parse'd values. You could just pass a a new
   GetHooksPath => 1 to Git->repository() and if so populate this, then
   call that as $repo->git_path_hooks.

2. FWIW it's more idiomatic in perl to just do : chomp(my $x = y()); not
   my $x = y(); chomp $x. The chomp operator works in-place, but once
   you'd use the helpers in Git.pm for this they'd do all that for you.

>  		my $hook_error;
>  		if (-x $validate_hook) {
>  			my $target = abs_path($fn);