[PATCH v3 00/11] Untracked cache improvements

Here is a new version of a patch series to improve the untracked cache feature.

This v3 still implements core.untrackedCache as a simple bool config variable. When it's true, Git should always try to use the untracked cache, and when false, Git should never use it.

Patch 1/11 is a small bugfix that has been moved to the start of the series so it might get applied independently.

Patch 2/11 to 4/11 add some small features that are missing. They haven't been changed since the previous series.

Patchs 5/11 to 8/11 are some refactoring to prepare for the following patchs. Among them 7/11 is new, the others haven't changed.

Patch 9/11 replaces patch 10/10 in the previous series. It deals with the "ident" field in "struct untracked_cache". As suggested by Junio, we keep paying attention to the location of the work tree that is stored in this field, but otherwise things are simplified a lot.

Patch 10/11 which adds core.untrackedCache, contains a few simplifications compared to v2.

Patch 11/11 has not been changed.

So the changes compared to v2 are mostly small updates, and patchs 7/11 and 9/11.

The patch series is also available there:

https://github.com/chriscool/git/tree/uc-notifs34

Thanks to the reviewers and helpers.

Christian Couder (11):
  dir: free untracked cache when removing it
  update-index: use enum for untracked cache options
  update-index: add --test-untracked-cache
  update-index: add untracked cache notifications
  update-index: move 'uc' var declaration
  dir: add add_untracked_cache()
  dir: add new_untracked_cache()
  dir: add remove_untracked_cache()
  dir: simplify untracked cache "ident" field
  config: add core.untrackedCache
  t7063: add tests for core.untrackedCache

 Documentation/config.txt               |  7 ++++
 Documentation/git-update-index.txt     | 61 ++++++++++++++++++++++++-----
 builtin/update-index.c                 | 54 ++++++++++++++------------
 cache.h                                |  1 +
 config.c                               |  4 ++
 contrib/completion/git-completion.bash |  1 +
 dir.c                                  | 70 ++++++++++++++++++++++++++++------
 dir.h                                  |  2 +
 environment.c                          |  1 +
 t/t7063-status-untracked-cache.sh      | 52 ++++++++++++++++++++++---
 wt-status.c                            |  5 +++
 11 files changed, 207 insertions(+), 51 deletions(-)