Our application (Visual Studio) needs to run git status with options
to report untracked and ignored files. It needs all untracked files
reported individually, but would rather not have all individual
ignored files under explicitly ignored directories
reported. Directories that match an ignore pattern should be reported,
instead of all contained files.

It is not possible to get this output with the current arguments
available to git status. You can get ignored files (--ignored), all
untracked files (--untracked-files=all), but if you specify both
options then you will also get all individual ignored files.

This change is to add the option to have git status report all
untracked files while also reporting directories that match an ignore
pattern. The logic in dir.c was also modified to not iterate over all
files in an ignored directory. This change resulted in a performance
improvement in work directories with a large number of files contained
in ignored directories.  For example, this setup is present when bin
and obj directories are contained in the repository work dir.

Jameson Miller (1):
  dir: teach status to show ignored directories

 Documentation/git-status.txt                      |   5 +
 Documentation/technical/api-directory-listing.txt |   6 +
 builtin/commit.c                                  |   4 +
 dir.c                                             |  48 +++++-
 dir.h                                             |   3 +-
 t/t7519-status-show-ignored-directory.sh          | 189 ++++++++++++++++++++++
 wt-status.c                                       |   4 +
 wt-status.h                                       |   1 +
 8 files changed, 253 insertions(+), 7 deletions(-)
 create mode 100755 t/t7519-status-show-ignored-directory.sh


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