Re: [PATCH] builtin/clone: avoid failure with GIT_DEFAULT_HASH

[Taylor Blau <me@ttaylorr.com>]

On Fri, Sep 11, 2020 at 11:38:15PM +0000, brian m. carlson wrote:
> Neither of those are appealing, so let's tell the repository
> initialization code if we're doing a reinit like this, and if so, to
> clear the extension if we're using SHA-1.  This makes sure we produce a
> valid and functional repository and doesn't break any of our other use
> cases.

Your explanation makes sense, and what you're proposing here seems like
a very reasonable path forward. I can't think of anything that would
cause it not to work as expected.

> -void initialize_repository_version(int hash_algo);
> +void initialize_repository_version(int hash_algo, int reinit);

I'm not a huge fan of adding a 'reinit' parameter to a function that
itself begins with the word 'initialize' (why wouldn't you call
'reinitialize_repository_version()' instead?), but seeing as there are
only a couple of callers, maybe it is OK.

Alternatively, I certainly wouldn't complain if you did introduce a new
function and updated the call-site that passes reinit as 1.

> +test_expect_success 'clone with GIT_DEFAULT_HASH' '
> +	(
> +		sane_unset GIT_DEFAULT_HASH &&
> +		git init test
> +	) &&
> +	test_commit -C test foo &&
> +	git clone test test-clone &&
> +	git -C test-clone status
> +'
> +

This test looks very reasonable, and certainly demonstrates the bug and
fix. Thanks.

With or without my nitpick:

  Reviewed-by: Taylor Blau <me@ttaylorr.com>

Thanks,
Taylor