Re: [PATCH 2/5] tests: respect GIT_TEST_INSTALLED when initializing repositories

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi Junio,

On Wed, 14 Nov 2018, Junio C Hamano wrote:

> "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
> writes:
> 
> > From: Johannes Schindelin <johannes.schindelin@gmx.de>
> >
> > It really makes very, very little sense to use a different git
> > executable than the one the caller indicated via setting the environment
> > variable GIT_TEST_INSTALLED.
> 
> Makes perfect sense.  Shouldn't we be asking where the template
> directory of the installed version is and using it instead of the
> freshly built one, no?

It would make sense, but we don't know how to get that information, do we?

$ git grep DEFAULT_GIT_TEMPLATE_DIR
Makefile:       -DDEFAULT_GIT_TEMPLATE_DIR='"$(template_dir_SQ)"'
builtin/init-db.c:#ifndef DEFAULT_GIT_TEMPLATE_DIR
builtin/init-db.c:#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
builtin/init-db.c:              template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR);
contrib/vscode/init.sh: '-DDEFAULT_GIT_TEMPLATE_DIR="$(template_dir_SQ)"' \

In other words, the Makefile defines the DEFAULT_GIT_TEMPLATE_DIR, and the
only user in the code is init-db.c which uses it in copy_templates().

And changing the code *now* to let us query Git where it thinks its
templates should be won't work, as this patch is about using the installed
Git (at whatever pre-compiled version that might be).

Ciao,
Dscho

> >
> > Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> > ---
> >  t/test-lib-functions.sh | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
> > index 78d8c3783b..801cc9b2ef 100644
> > --- a/t/test-lib-functions.sh
> > +++ b/t/test-lib-functions.sh
> > @@ -900,7 +900,8 @@ test_create_repo () {
> >  	mkdir -p "$repo"
> >  	(
> >  		cd "$repo" || error "Cannot setup test environment"
> > -		"$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
> > +		"${GIT_TEST_INSTALLED:-$GIT_EXEC_PATH}/git" init \
> > +			"--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
> >  		error "cannot run git init -- have you built things yet?"
> >  		mv .git/hooks .git/hooks-disabled
> >  	) || exit
>