Subject: Re: [PATCH 2/2] git: support separate arg for `--config-env`'s value

From: Ævar Arnfjörð Bjarmason <[email-masked]>
Date: Tue, 20 Apr 2021 12:52:43 +0200

On Mon, Apr 19 2021, Patrick Steinhardt wrote:

> While not documented as such, many of the top-level options like
> `--git-dir` and `--work-tree` support two syntaxes: they accept both an
> equals sign between option and its value, and they do support option and
> value as two separate arguments. The recently added `--config-env`
> option only supports the syntax with an equals sign.
>
> Mitigate this inconsistency by accepting both syntaxes and add tests to
> verify both work.
>
> Signed-off-by: Patrick Steinhardt <[email-masked]>

This whole series LGTM.

>  git.c             |  8 ++++++++
>  t/t1300-config.sh | 15 ++++++++++++++-
>  2 files changed, 22 insertions(+), 1 deletion(-)
>
> diff --git a/git.c b/git.c
> index b53e665671..ad365c05c7 100644
> --- a/git.c
> +++ b/git.c
> @@ -255,6 +255,14 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
>  			git_config_push_parameter((*argv)[1]);
>  			(*argv)++;
>  			(*argc)--;
> +		} else if (!strcmp(cmd, "--config-env")) {
> +			if (*argc < 2) {
> +				fprintf(stderr, _("no config key given for --config-env\n" ));

I found this use of fprintf() slightly odd, why not error(), but then
went back and read the function and saw that it has N number of
"fprintf(stderr, [...])" already.

That could probably all be converted to error(), but better to be
consistent for now.

> +				usage(git_usage_string);
> +			}
> +			git_config_push_env((*argv)[1]);
> +			(*argv)++;
> +			(*argc)--;
>  		} else if (skip_prefix(cmd, "--config-env=", &cmd)) {
>  			git_config_push_env(cmd);
>  		} else if (!strcmp(cmd, "--literal-pathspecs")) {
> diff --git a/t/t1300-config.sh b/t/t1300-config.sh
> index e0dd5d65ce..18803f9953 100755
> --- a/t/t1300-config.sh
> +++ b/t/t1300-config.sh
> @@ -1374,16 +1374,29 @@ test_expect_success 'git --config-env=key=envvar support' '
>  	cat >expect <<-\EOF &&
>  	value
>  	value
> +	value
> +	value
> +	false
>  	false
>  	EOF
>  	{
>  		ENVVAR=value git --config-env=core.name=ENVVAR config core.name &&
> +		ENVVAR=value git --config-env core.name=ENVVAR config core.name &&
>  		ENVVAR=value git --config-env=foo.CamelCase=ENVVAR config foo.camelcase &&
> -		ENVVAR= git --config-env=foo.flag=ENVVAR config --bool foo.flag
> +		ENVVAR=value git --config-env foo.CamelCase=ENVVAR config foo.camelcase &&
> +		ENVVAR= git --config-env=foo.flag=ENVVAR config --bool foo.flag &&
> +		ENVVAR= git --config-env foo.flag=ENVVAR config --bool foo.flag
>  	} >actual &&
>  	test_cmp expect actual
>  '
>  
> +test_expect_success 'git --config-env with missing value' '
> +	test_must_fail env ENVVAR=value git --config-env 2>error &&
> +	test_i18ngrep "no config key given for --config-env" error &&
> +	test_must_fail env ENVVAR=value git --config-env config core.name 2>error &&
> +	test_i18ngrep "invalid config format: config" error
> +'
> +
>  test_expect_success 'git --config-env fails with invalid parameters' '
>  	test_must_fail git --config-env=foo.flag config --bool foo.flag 2>error &&
>  	test_i18ngrep "invalid config format: foo.flag" error &&