On 05/01, Jonathan Nieder wrote:
> "git clone --config" uses the following incantation to add an item to
> a config file, instead of replacing an existing value:
>
> git_config_set_multivar_gently(key, value, "^$", 0)
>
> As long as no existing value matches the regex ^$, that works as
> intended and adds to the config. When a value is empty, though, it
> replaces the existing value.
>
> Noticed while trying to set credential.helper during a clone to use a
> specific helper without inheriting from ~/.gitconfig and
> /etc/gitconfig. That is, I ran
>
> git clone -c credential.helper= \
> -c credential.helper=myhelper \
> https://example.com/repo
>
> intending to produce the configuration
>
> [credential]
> helper =
> helper = myhelper
>
> Without this patch, the 'helper =' line is not included and the
> credential helper from /etc/gitconfig gets used.
>
> Signed-off-by: Jonathan Nieder <[email protected]>
> ---
> Thoughts?
After reading this I'm still a little fuzzy on why the empty helper line
is needed to avoid using the credential helper from /etc/gitconfig.
>
> Thanks,
> Jonathan
>
> builtin/clone.c | 4 +++-
> t/t5611-clone-config.sh | 8 ++++++++
> 2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/builtin/clone.c b/builtin/clone.c
> index de85b85254..a6ae7d6180 100644
> --- a/builtin/clone.c
> +++ b/builtin/clone.c
> @@ -773,7 +773,9 @@ static int checkout(int submodule_progress)
>
> static int write_one_config(const char *key, const char *value, void *data)
> {
> - return git_config_set_multivar_gently(key, value ? value : "true",
> "^$", 0);
> + return git_config_set_multivar_gently(key,
> + value ? value : "true",
> + CONFIG_REGEX_NONE, 0);
> }
>
> static void write_config(struct string_list *config)
> diff --git a/t/t5611-clone-config.sh b/t/t5611-clone-config.sh
> index e4850b778c..39329eb7a8 100755
> --- a/t/t5611-clone-config.sh
> +++ b/t/t5611-clone-config.sh
> @@ -19,6 +19,14 @@ test_expect_success 'clone -c can set multi-keys' '
> test_cmp expect actual
> '
>
> +test_expect_success 'clone -c can set multi-keys, including some empty' '
> + rm -rf child &&
> + git clone -c credential.helper= -c credential.helper=hi . child &&
> + printf "%s\n" "" hi >expect &&
> + git --git-dir=child/.git config --get-all credential.helper >actual &&
> + test_cmp expect actual
> +'
> +
> test_expect_success 'clone -c without a value is boolean true' '
> rm -rf child &&
> git clone -c core.foo . child &&
> --
> 2.13.0.rc1.294.g07d810a77f
>
--
Brandon Williams
