Re: [PATCH v8 3/4] format-patch: add "chronological" format for cover

> Having a user craft a custom format spec everytime might be a hassle,
> and having a common format that seems reasonable might make reviews
> easier. This patch introduces a new simple preset called "chronological".
>
> Teach make_cover_letter() the "chronological" format.

> Signed-off-by: Mirko Faina <mroik@delayed.space>
> ---
>  Documentation/git-format-patch.adoc |  2 +-
>  builtin/log.c                       |  3 +++
>  t/t4014-format-patch.sh             | 11 +++++++++++
>  3 files changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/git-format-patch.adoc b/Documentation/git-format-patch.adoc
> index de36b87a85..6364fd1f5a 100644
> --- a/Documentation/git-format-patch.adoc
> +++ b/Documentation/git-format-patch.adoc
> @@ -326,7 +326,7 @@ feeding the result to `git send-email`.
>  	Specify the format in which to generate the commit list of the patch
>  	series. This option is available if the user wants to use an
>  	alternative to the default `shortlog` format. The accepted values for
> -	format-spec are "shortlog" or a format string.
> +	format-spec are "shortlog", "chronological" or a format string.
>  	e.g. `%s (%an)`
>  	If defined, defaults to the `format.commitListFormat` configuration
>  	variable.
> diff --git a/builtin/log.c b/builtin/log.c
> index 4f22012395..12877a0ac2 100644
> --- a/builtin/log.c
> +++ b/builtin/log.c
> @@ -50,6 +50,7 @@
>  #define MAIL_DEFAULT_WRAP 72
>  #define COVER_FROM_AUTO_MAX_SUBJECT_LEN 100
>  #define FORMAT_PATCH_NAME_MAX_DEFAULT 64
> +#define CHRONOLOGICAL "[%(count)/%(total)] %s"
>  
>  static unsigned int force_in_body_from;
>  static int stdout_mboxrd;
> @@ -1420,6 +1421,8 @@ static void make_cover_letter(struct rev_info *rev, int use_separate_file,
>  
>  	if (format == NULL || !strcmp(format, "shortlog"))
>  		generate_shortlog_cover_letter(&log, rev, list, nr);
> +	else if (!strcmp(format, "chronological"))
> +		generate_commit_list_cover(rev->diffopt.file, CHRONOLOGICAL, list, nr);
>  	else
>  		generate_commit_list_cover(rev->diffopt.file, format, list, nr);
>  
> diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
> index 631669c159..5ec527bce9 100755
> --- a/t/t4014-format-patch.sh
> +++ b/t/t4014-format-patch.sh
> @@ -392,6 +392,17 @@ test_expect_success 'cover letter with subject, author and count' '
>  	test_grep "^\[1/1\] This is a subject (A U Thor)$" patches/0000-cover-letter.patch
>  '
>  
> +test_expect_success 'cover letter chronological' '
> +	test_when_finished "git reset --hard HEAD~1" &&
> +	test_when_finished "rm -rf patches result test_file" &&
> +	touch test_file &&
> +	git add test_file &&
> +	git commit -m "This is a subject" &&
> +	git format-patch --cover-letter \
> +	--cover-letter-format="chronological" -o patches HEAD~1 &&
> +	test_grep "^\[1/1\] This is a subject$" patches/0000-cover-letter.patch
> +'
> +
>  cat > expected <<EOF