[PATCHv2] git-p4 worktree support

Second attempt at teaching git-p4 about worktrees.

Earlier discussion here:

http://marc.info/?l=git&m=148097985622294

Git-p4 exports GIT_DIR so that when it chdirs into the P4 client area to apply the change, git commands called from there will work correctly.

Luke Diamand (1):
  git-p4: support git worktrees

 git-p4.py               | 47 ++++++++++++++++++++++++++---------------------
 t/t9800-git-p4-basic.sh | 20 ++++++++++++++++++++
 2 files changed, 46 insertions(+), 21 deletions(-)