[PATCH v4 0/4] git add --chmod: always change the file

Thanks Junio for the review of my last round.

Changes since then:
[1/4]: patch unchanged
[2/4]: Only adds a test now, and corrects the type of the argument of
       chmod_path, but leaves the rest of the patch unchanged.
[3/4]: chmod_index_entry now takes a char as argument which can either
       be + or -, and changes the mode based on that, instead of using
       the 0777 or 0666 mode that was passed in from the outside.
[4/4]: Adapted to the different behaviour of chmod_index_entry and
       added tests as suggested by Junio.

Thomas Gummerer (4):
  add: document the chmod option
  update-index: add test for chmod flags
  read-cache: introduce chmod_index_entry
  add: modify already added files when --chmod is given

 Documentation/git-add.txt     |  7 +++++-
 builtin/add.c                 | 47 ++++++++++++++++++++++++----------------
 builtin/checkout.c            |  2 +-
 builtin/commit.c              |  2 +-
 builtin/update-index.c        | 18 +++-------------
 cache.h                       | 12 ++++++-----
 read-cache.c                  | 43 ++++++++++++++++++++++++++++++-------
 t/t2107-update-index-basic.sh | 13 +++++++++++
 t/t3700-add.sh                | 50 +++++++++++++++++++++++++++++++++++++++++++
 9 files changed, 144 insertions(+), 50 deletions(-)