[PATCHv2 0/7] Moved code detection: ignore space on uniform indentation

v2:
I think I have addressed Jonathans feedback
* by using a string instead of counting the first character only.
* refined tests slightly (easier to read)
* moved white space handling for moved blocks into its own flag field,
  keeping the enum for the actual mode of move detection.

v1: This is a re-attempt of [1], which allows the moved code detection to ignore blanks in various modes.

patches 1-5 are refactoring, patch 6 adds all existing white space options of regular diff to the move detection. (I am unsure about this patch, as I presume we want to keep the option space at a minimum if possible).

The fun is in the last patch, which allows white space sensitive languages to trust the move detection, too. Each block that is marked as moved will have the same delta in {in-, de-}dentation. I would think this mode might be a reasonable default eventually.

Thanks, Stefan

[1] https://public-inbox.org/git/20171025224620.27657-1-sbeller@google.com/

Stefan Beller (7):
  xdiff/xdiff.h: remove unused flags
  xdiff/xdiffi.c: remove unneeded function declarations
  diff.c: do not pass diff options as keydata to hashmap
  diff.c: adjust hash function signature to match hashmap expectation
  diff.c: add a blocks mode for moved code detection
  diff.c: decouple white space treatment from move detection algorithm
  diff.c: add --color-moved-ignore-space-delta option

 Documentation/diff-options.txt |  25 ++++-
 diff.c                         | 128 ++++++++++++++++++----
 diff.h                         |   8 +-
 t/t4015-diff-whitespace.sh     | 192 +++++++++++++++++++++++++++++++--
 xdiff/xdiff.h                  |   8 --
 xdiff/xdiffi.c                 |  17 ---
 6 files changed, 322 insertions(+), 56 deletions(-)