[PATCH v2 0/4] implement automatic submodule merge strategy when possible

Changes since the previous iteration:

 * Add missing option --ancestry-path to setup_revisions()
 * Drop unnecessary caching of submodule refs
 * Use buf.len instead of NUL-padding for path buffer in
   git_path_submodule()
 * Extend the testcases so they will check for the correct suggestion
   output in case of a failed merge.
 * cleanup of some comments

Heiko Voigt (4):
  add missing && to submodule-merge testcase
  teach ref iteration module about submodules
  extent setup_revisions() so it works with submodules
  implement automatic fast forward merge for submodules

 cache.h                    |    3 +
 merge-recursive.c          |    9 ++-
 path.c                     |   38 +++++++++++
 refs.c                     |  149 ++++++++++++++++++++++++++++++++---------
 refs.h                     |    8 ++
 revision.c                 |   32 +++++----
 revision.h                 |    1 +
 submodule.c                |  158 ++++++++++++++++++++++++++++++++++++++++++++
 submodule.h                |    2 +
 t/t7405-submodule-merge.sh |  129 ++++++++++++++++++++++++++++++++++--
 10 files changed, 473 insertions(+), 56 deletions(-)