[PATCH 0/9] Undoing conflict resolution

This series resurrects the topic we discussed later November.

I wrote a bit about this in http://gitster.livejournal.com/43665.html but as usual with my patches, they do come with minimum set of tests but it contains no documentation updates. The user visible changes are:

 - ls-files has a new option primarily for debugging;
 - update-index has a new option --clear-resolve-undo;
 - rerere has a new subcommand forget.

Junio C Hamano (9):
  builtin-merge.c: use standard active_cache macros
  resolve-undo: record resolved conflicts in a new index extension
    section
  resolve-undo: basic tests
  resolve-undo: allow plumbing to clear the information
  resolve-undo: "checkout -m path" uses resolve-undo information
  resolve-undo: teach "update-index --unresolve" to use resolve-undo
    info
  rerere: remove silly 1024-byte line limit
  rerere: refactor rerere logic to make it independent from I/O
  rerere forget path: forget recorded resolution

 Makefile                  |    2 +
 builtin-checkout.c        |    6 +
 builtin-ls-files.c        |   43 +++++++-
 builtin-merge.c           |    9 +-
 builtin-read-tree.c       |    2 +
 builtin-rerere.c          |    2 +
 builtin-update-index.c    |   18 +++-
 cache.h                   |    4 +
 read-cache.c              |   18 +++
 rerere.c                  |  259 +++++++++++++++++++++++++++++++++++++-------
 rerere.h                  |    1 +
 resolve-undo.c            |  176 ++++++++++++++++++++++++++++++
 resolve-undo.h            |   16 +++
 t/t2030-unresolve-info.sh |  140 ++++++++++++++++++++++++
 14 files changed, 648 insertions(+), 48 deletions(-)
 create mode 100644 resolve-undo.c
 create mode 100644 resolve-undo.h
 create mode 100755 t/t2030-unresolve-info.sh