Re: [PATCH v2 2/5] preload-index: teach GIT_FORCE_PRELOAD_TEST to take a boolean

From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sep 14, 2018, 20:51 UTC
Message-ID: <20180914205158.GC133420@aiede.svl.corp.google.com>
In-Reply-To: <20180914201340.37400-3-benpeart@microsoft.com>

Ben Peart wrote:

> Subject: preload-index: teach GIT_FORCE_PRELOAD_TEST to take a boolean

Reading this subject line alone (e.g. in "git log --oneline" output), it's not obvious to me what this patch will do.

What behavior change does it make / what will it make newly possible?

Maybe something like:

	preload-index: use git_env_bool() not getenv() for customization

	GIT_FORCE_PRELOAD_TEST is only checked for presence by using getenv().
	Use git_env_bool() instead so that GIT_FORCE_PRELOAD_TEST=false can
	work as expected.

Show 7 quoted lines

> Teach GIT_FORCE_PRELOAD_TEST to take a boolean to turn on or off this test
> feature instead of simply testing for existance.
>
> Signed-off-by: Ben Peart <Ben.Peart@microsoft.com>
> ---
>  preload-index.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Can you say a little about how this came up? Was it just noticed while reading the code, or did it come up in practice?

I wonder if a more useful knob would be a GIT_FORCE_PRELOAD_THREADS setting, but that's orthogonal to this change.

Thanks and hope that helps, Jonathan