Re: [PATCH] git config: do not create .git/ if it does not exist yet

[Jeff King <peff@peff.net>]

On Wed, Feb 24, 2016 at 10:14:03AM +0000, John Keeping wrote:

> On Wed, Feb 24, 2016 at 03:26:57AM -0500, Jeff King wrote:
> > On Wed, Feb 24, 2016 at 08:47:00AM +0100, Johannes Schindelin wrote:
> > 
> > > 	I cannot think of a way how to test this: all of the regression
> > > 	tests run inside Git's own worktree, and we cannot even assume
> > > 	that /tmp/ is outside of a worktree (or that it exists).
> > 
> > We could make the test conditional on whether we are in a repo. Anybody
> > who builds from a tarball, or who uses --root would then run the test.
> 
> Could we use GIT_CEILING_DIRECTORIES for this?  If it's set to
> TEST_OUTPUT_DIRECTORY won't that cover the in-tree and out-of-tree test
> cases?

Oh, right. That's much less nasty than my suggestion.

> We probably do still want Peff's REPOLESS prereq just in case someone is
> collecting test results in a repository,

We can create arbitrary hierarchies within the trash directory. So even
without removing the trash-dir .git, we could probably do:

  mkdir -p non-repo/foo &&
  (
	cd non-repo &&
	GIT_CEILING_DIRECTORIES=$(pwd) &&
	export GIT_CEILING_DIRECTORIES &&
	cd foo &&
	git config foo.bar baz
  )

or something. That should work everywhere.

> but I think that will see much
> better coverage than relying on people running tests from the tarball.

With mine I think we'd see coverage from git devs, as it works with
--root, too (and if you're not using --root with a RAM disk, I highly
recommend it for the speedup). But your suggestion is way better.

-Peff