Re: [PATCH 1/3] format-patch: document and exercise that -o does only create the trailing directory

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Hi Bert,

> Subject: format-patch: document and exercise that -o does only create the trailing directory

s/does only create/only creates/ ?

Anyway, as a prepatory patch, I don't think that it's necessary. Maybe
it's just me but I assume that most tools create at most one directory
deep. Even mkdir won't created nested dirs unless you pass `-p`. I
dunno.

On Wed, Oct 02, 2019 at 11:26:11PM +0200, Bert Wesarg wrote:
> Signed-off-by: Bert Wesarg <bert.wesarg@xxxxxxxxxxxxxx>
> ---
>  Documentation/config/format.txt    |  3 ++-
>  Documentation/git-format-patch.txt |  4 +++-
>  t/t4014-format-patch.sh            | 16 ++++++++++++++++
>  3 files changed, 21 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/config/format.txt b/Documentation/config/format.txt
> index 414a5a8a9d..e17c5d6b0f 100644
> --- a/Documentation/config/format.txt
> +++ b/Documentation/config/format.txt
> @@ -80,7 +80,8 @@ format.coverLetter::
>  
>  format.outputDirectory::
>  	Set a custom directory to store the resulting files instead of the
> -	current working directory.
> +	current working directory. Only the trailing directory will be created
> +	though.
>  
>  format.useAutoBase::
>  	A boolean value which lets you enable the `--base=auto` option of
> diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
> index b9b97e63ae..fe7492353e 100644
> --- a/Documentation/git-format-patch.txt
> +++ b/Documentation/git-format-patch.txt
> @@ -66,7 +66,9 @@ they are created in the current working directory. The default path
>  can be set with the `format.outputDirectory` configuration option.
>  The `-o` option takes precedence over `format.outputDirectory`.
>  To store patches in the current working directory even when
> -`format.outputDirectory` points elsewhere, use `-o .`.
> +`format.outputDirectory` points elsewhere, use `-o .`. Note that only
> +the trailing directory will be created by Git, leading directories must
> +already exists.
>  
>  By default, the subject of a single patch is "[PATCH] " followed by
>  the concatenation of lines from the commit message up to the first blank
> diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
> index ca7debf1d4..bf2715a503 100755
> --- a/t/t4014-format-patch.sh
> +++ b/t/t4014-format-patch.sh
> @@ -1632,6 +1632,22 @@ test_expect_success 'From line has expected format' '
>  	test_cmp from filtered
>  '
>  
> +test_expect_success 'format-patch -o with no leading directories' '
> +	rm -fr patches &&
> +	git format-patch -o patches master..side &&
> +	test $(git rev-list master..side | wc -l) -eq $(ls patches | wc -l)

For test case you write, please use the following pattern:

	git rev-list master..side >list &&
	test_line_count = $(ls patches | wc -l) list

The first benefit is that we get to take advantage of the
test_line_count function that's already written for us. The second is
that when we write tests, we shouldn't put Git commands in the upstream
of a pipe because if they fail, their return codes will be lost and we
won't be able to fail the test properly.

> +'
> +
> +test_expect_success 'format-patch -o with leading existing directories' '
> +	git format-patch -o patches/side master..side &&
> +	test $(git rev-list master..side | wc -l) -eq $(ls patches/side | wc -l)
> +'
> +
> +test_expect_failure 'format-patch -o with leading non-existing directories' '
> +	rm -fr patches &&
> +	git format-patch -o patches/side master..side
> +'

As above, I wouldn't really call this a bug in Git. I think we should
leave this test case off until the next patch.

> +
>  test_expect_success 'format-patch format.outputDirectory option' '
>  	test_config format.outputDirectory patches &&
>  	rm -fr patches &&
> -- 
> 2.23.0.11.g242cf7f110
> 



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