Re: [PATCH v1 4/4] maintenance: use XDG config if it exists

[Eric Sunshine <sunshine@sunshineco.com>]

On Mon, Oct 23, 2023 at 5:58 AM Patrick Steinhardt <ps@pks.im> wrote:
> On Wed, Oct 18, 2023 at 10:28:41PM +0200, Kristoffer Haugsbakk wrote:
> > `git maintenance register` registers the repository in the user's global
> > config. `$XDG_CONFIG_HOME/git/config` is supposed to be used if
> > `~/.gitconfig` does not exist. However, this command creates a
> > `~/.gitconfig` file and writes to that one even though the XDG variant
> > exists.
> >
> > This used to work correctly until 50a044f1e4 (gc: replace config
> > subprocesses with API calls, 2022-09-27), when the command started calling
> > the config API instead of git-config(1).
> >
> > Also change `unregister` accordingly.
> >
> > Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
> > ---
> > +test_expect_success 'register uses XDG_CONFIG_HOME config if it exists' '
> > +     XDG_CONFIG_HOME=.config &&
> > +     test_when_finished rm -r "$XDG_CONFIG_HOME"/git/config &&
> > +     export "XDG_CONFIG_HOME" &&
>
> Also, I think we need to unset this variable at the end of this test as
> tests don't run in a subshell. [...]

Yup, well spotted. Almost the entire body of this test should be in a
subshell to ensure that the environment variable does not live beyond
the end of this test. But test_when_finished() can't be used in a
subshell, so a little care is needed:

    test_expect_success 'register uses XDG_CONFIG_HOME config if it exists' '
        test_when_finished rm -r .config/git/config &&
        (
            XDG_CONFIG_HOME=.config &&
            ...
        )
    '

> > +     mkdir -p "$XDG_CONFIG_HOME"/git &&
> > +     touch "$XDG_CONFIG_HOME"/git/config &&

If the timestamp of the file is not significant, then we use `>` to
create it rather than `touch`:

    >"$XDG_CONFIG_HOME"/git/config &&

> > +     git maintenance register &&
> > +     git config --file="$XDG_CONFIG_HOME"/git/config --get maintenance.repo >actual &&
> > +     pwd >expect &&
> > +     test_cmp expect actual
> > +'