[PATCH 0/7] Keep git clean -d from inadvertently removing ignored files

[Samuel Lijin <sxlijin@gmail.com>]

This patch series fixes the bug where git clean -d culls directories containing
only untracked and ignored files, by first teaching read_directory() and
read_directory_recursive() to search "untracked" directories (read: directories
*treated* as untracked because they only contain untracked and ignored files)
for ignored contents, and then teaching cmd_clean() to skip untracked
directories containing ignored files.

This does, however, introduce a breaking change in the behavior of git status:
when invoked with --ignored, git status will now return ignored files in an
untracked directory, whereas previously it would not.

First patches to the actual C code that I'm sending out! :D Looking forward to
feedback - the changes I made in read_directory_recursive() and read_directory()
feel a bit hacky, but I'm not sure how to get around that.

Samuel Lijin (7):
  t7300: skip untracked dirs containing ignored files
  dir: recurse into untracked dirs for ignored files
  dir: add method to check if a dir_entry lexically contains another
  dir: hide untracked contents of untracked dirs
  dir: change linkage of cmp_name() and check_contains()
  builtin/clean: teach clean -d to skip dirs containing ignored files
  t7061: check for ignored file in untracked dir

 builtin/clean.c            | 24 ++++++++++++++++--
 dir.c                      | 61 ++++++++++++++++++++++++++++++++++++++++++++--
 dir.h                      |  3 +++
 t/t7061-wtstatus-ignore.sh |  1 +
 t/t7300-clean.sh           | 10 ++++++++
 5 files changed, 95 insertions(+), 4 deletions(-)

-- 
2.12.2