[RFC PATCH v4 0/4] Detection of directory renames

At last a reroll of that old series. The most prominent change is a split of the old --factorize-renames flag into --detect-dir-renames and --hide-dir-rename-details - hopefully following Junio's comments dated nearly 2 years ago. While doing this, a couple of testcases got added (as well as a list of more testcases to be written), and some minor optimizations were done, but no heavy surgery.

I hope we can turn the simple detection feature to something acceptable for inclusion - that is, once unified diff output shows the detected renames as annotations, and once the known major holes are plugged (both from FIXME and testcases). For the "hiding" one OTOH, a more precise description of what we want must probably be done before progressing, but I suggest we keep that for later.

Also, maybe the --detect-dir-renames would get a good alias as "-M -M".

Does all of that look reasonable ?

Yann Dirson (4):
  Introduce wholesame directory move detection in diffcore.
  Add testcases for the --detect-dir-renames diffcore flag.
  Allow hiding renames of individual files involved in a directory
    rename.
  Add testcases for the --hide-dir-rename-details diffcore flag.

 diff-lib.c                       |    6 +-
 diff.c                           |   12 +
 diff.h                           |    6 +
 diffcore-rename.c                |  316 +++++++++++++++++++++++++++-
 diffcore.h                       |    1 +
 t/t4046-diff-rename-factorize.sh |  433 ++++++++++++++++++++++++++++++++++++++
 tree-diff.c                      |    4 +-
 7 files changed, 766 insertions(+), 12 deletions(-)
 create mode 100755 t/t4046-diff-rename-factorize.sh