Re: [PATCH 2/2] t/README: hint about using $(pwd) rather than $PWD in tests

[Jonathan Nieder <jrnieder@gmail.com>]

Johannes Sixt wrote:

> This adds just a "do it this way" instruction without a lot of explanation,
> because the details are too complex to be explained at this point.

Thanks, looks very useful.

> --- a/t/README
> +++ b/t/README
> @@ -283,6 +283,12 @@ Do:
>     Tests that are likely to smoke out future regressions are better
>     than tests that just inflate the coverage metrics.
>  
> + - When a test checks for an absolute path that a git command generated,
> +   construct the expected value using $(pwd) rather than $PWD,
> +   $TEST_DIRECTORY, or $TRASH_DIRECTORY. It makes a difference on
> +   Windows, where the shell (MSYS bash) mangles absolute path names.
> +   For details, see the commit message of 4114156ae9.
> +

Perhaps it is also worth explaining the cases where $PWD is needed?

	By contrast, when a passing a path to git or constructing a URL,
	use $PWD.  It makes a difference on Windows, where

	 - $(pwd) is a Windows-style path such as git might output, and
	 - $PWD is a Unix-style path that the shell (MSYS bash) will
	   mangle before passing to native apps like git.