[PATCH v7 0/7] implement inline submodule diff format

From: Jacob Keller <jacob.keller@gmail.com>

As suggested by Junio, I broke this patch into several pieces, and made a common helper function for the submodule header. Note that there are a couple of complicated modifications to the submodule header portion which (should) still result in the same header but allow the diff format a bit better control. It's a bit awkward but it does pass all the current tests, and the format between the two should be similar.

I tried to break apart the patches properly, so I hope I didn't accidentally munge them too badly.

Jacob Keller (6):
  graph: add support for --line-prefix on all graph-aware output
  diff: prepare for additional submodule formats
  submodule: allow do_submodule_path to work if given gitdir directly
  submodule: correct output of submodule log format
  submodule: refactor show_submodule_summary with helper function
  diff: teach diff to display submodule difference with an inline diff

Junio C Hamano (1):
  diff.c: remove output_prefix_length field

 Documentation/diff-config.txt                      |   9 +-
 Documentation/diff-options.txt                     |  20 +-
 builtin/rev-list.c                                 |  70 +-
 diff.c                                             |  52 +-
 diff.h                                             |  11 +-
 graph.c                                            | 106 +--
 graph.h                                            |  22 +-
 log-tree.c                                         |   5 +-
 path.c                                             |   4 +-
 submodule.c                                        | 162 ++++-
 submodule.h                                        |   6 +
 t/t4013-diff-various.sh                            |   6 +
 ...diff.diff_--line-prefix=abc_master_master^_side |  29 +
 t/t4013/diff.diff_--line-prefix_--cached_--_file0  |  15 +
 t/t4059-diff-submodule-option-diff-format.sh       | 733 +++++++++++++++++++++
 t/t4202-log.sh                                     | 323 +++++++++
 16 files changed, 1432 insertions(+), 141 deletions(-)
 create mode 100644 t/t4013/diff.diff_--line-prefix=abc_master_master^_side
 create mode 100644 t/t4013/diff.diff_--line-prefix_--cached_--_file0
 create mode 100755 t/t4059-diff-submodule-option-diff-format.sh