[PATCH 0/3] Fix git-init in linked worktrees

My ASAP is not so ASAP. Sorry about that but I think I have fixed it.

Side note about 2/3. I've known this problem (in general) for years (accidentally reading .git config file before .git is searched) and could not do anything about it. And because test_expect_failure should only be there if someone will eventually fix it, and I don't see myself doing it, and I don't see it super important that other people would bother, so I decided to simply sweep it under the rug. I could make a test_expect_failure if people think otherwise.

Side note about 3/3. Yes there's a FIXME in there. It will take a lot more time to remove that FIXME (because setup_git_directory is not as simple). For now it should be ok to leave it there. When we find a use for get_first_git_dir outside git-init, we can fix it then.

Nguyễn Thái Ngọc Duy (3):
  init: correct re-initialization from a linked worktree
  t0001: work around the bug that reads config file before repo setup
  init: do not set core.worktree more often than necessary

 builtin/init-db.c |  4 ++--
 cache.h           |  1 +
 environment.c     | 16 +++++++++++++++-
 t/t0001-init.sh   | 19 +++++++++++++++++++
 4 files changed, 37 insertions(+), 3 deletions(-)