[PATCH v5 00/10] Improve path collision conflict resolutions

This series applies cleanly on master, since en/merge-cleanup-more has now merged down.

This series makes all the "file collision" conflict types be handled
consistently; making them all behave like add/add (as suggested by
Jonathan[1] and Junio[2]).  These types are:
  * add/add
  * rename/add
  * rename/rename(2to1)
  * each rename/add piece of a rename/rename(1to2)/add[/add] conflict

[1] https://public-inbox.org/git/20180312213521.GB58506@aiede.svl.corp.google.com/ [2] https://public-inbox.org/git/CAPc5daVu8vv9RdGON8JiXEO3ycDVqQ38ySzZc-cpo+AQcAKXjA@mail.gmail.com

Changes since v4:
  * Merged the two RFC patches into a single patch.
  * Added patch submitted by Stolee at the end.
  * (The addition of what are the last two patches are also the only
     difference since v3)

Derrick Stolee (1):
  merge-recursive: combine error handling

Elijah Newren (9):
  Add testcases for consistency in file collision conflict handling
  t6036, t6042: testcases for rename collision of already conflicting
    files
  merge-recursive: increase marker length with depth of recursion
  merge-recursive: new function for better colliding conflict
    resolutions
  merge-recursive: fix rename/add conflict handling
  merge-recursive: improve handling for rename/rename(2to1) conflicts
  merge-recursive: use handle_file_collision for add/add conflicts
  merge-recursive: improve rename/rename(1to2)/add[/add] handling
  t6036, t6043: increase code coverage for file collision handling

 ll-merge.c                           |   4 +-
 ll-merge.h                           |   1 +
 merge-recursive.c                    | 529 ++++++++++++++++-----------
 t/t6036-recursive-corner-cases.sh    | 430 +++++++++++++++++++++-
 t/t6042-merge-rename-corner-cases.sh | 333 ++++++++++++++++-
 t/t6043-merge-rename-directories.sh  | 144 +++++---
 6 files changed, 1149 insertions(+), 292 deletions(-)