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 <jrnieder@xxxxxxxxx> > --- > 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