Kill the_index, final part

Stefan I see you start removing more references of the_repository in another series (haven't really looked at it yet) so this is just heads up so we could coordinate if needed. Still WIP, not really ready for review yet.

This series removes use of the_index outside builtin/ and t/helper/. The only the_index reference left is in repository.c. The macro NO_THE_REPOSITORY_COMPATIBILITY_MACROS is now flipped to USE_THE_INDEX_COMPATIBILITY_MACROS. "the_index" is forbidden by default.

After this I think we can start pushing the_repository outside library code. Then perhaps clean them up in builtin code too and you can finally get rid of it. But I don't think that'll happen in a year's time.

Nguyễn Thái Ngọc Duy (19):
wt-status.c: remove implicit dependency on the_index wt-status.c: remove implicit dependency the_repository list-objects-filter.c: remove implicit dependency on the_index list-objects.c: remove implicit dependency on the_index sequencer.c: remove implicit dependency on the_index sequencer.c: remove implicit dependency on the_repository notes-merge.c: remove implicit dependency on the_index notes-merge.c: remove implicit dependency the_repository repository.c: replace hold_locked_index() with repo_hold_locked_index()
checkout: avoid the_index when possible
read-cache.c: kill read_index()
read-cache.c: replace update_index_if_able with repo_& transport.c: remove implicit dependency on the_index sha1-name.c: remove implicit dependency on the_index merge-recursive.c: remove implicit dependency on the_index merge-recursive.c: remove implicit dependency on the_repository read-cache.c: remove the_* from index_has_changes() cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch
Flip NO_THE_REPOSITORY_COMPATIBILITY_MACROS

 apply.c                              |   5 +-
 attr.c                               |   1 -
 blame.c                              |   4 +-
 builtin/add.c                        |   1 +
 builtin/am.c                         |  11 +-
 builtin/blame.c                      |   3 +-
 builtin/cat-file.c                   |   7 +-
 builtin/check-attr.c                 |   1 +
 builtin/check-ignore.c               |   1 +
 builtin/checkout-index.c             |   1 +
 builtin/checkout.c                   |   5 +-
 builtin/clean.c                      |   1 +
 builtin/clone.c                      |   1 +
 builtin/commit.c                     |  10 +-
 builtin/describe.c                   |   3 +-
 builtin/diff-files.c                 |   1 +
 builtin/diff-index.c                 |   1 +
 builtin/diff-tree.c                  |   3 +-
 builtin/diff.c                       |   3 +-
 builtin/difftool.c                   |   1 +
 builtin/fsck.c                       |   1 +
 builtin/grep.c                       |   4 +-
 builtin/hash-object.c                |   3 +-
 builtin/log.c                        |   4 +-
 builtin/ls-files.c                   |   1 -
 builtin/merge-index.c                |   1 +
 builtin/merge-ours.c                 |   1 +
 builtin/merge-recursive.c            |   2 +-
 builtin/merge-tree.c                 |   3 +-
 builtin/merge.c                      |   5 +-
 builtin/mv.c                         |   1 +
 builtin/notes.c                      |   2 +-
 builtin/pack-objects.c               |   2 +-
 builtin/pull.c                       |   4 +-
 builtin/push.c                       |   3 +-
 builtin/read-tree.c                  |   1 +
 builtin/rebase--helper.c             |  15 +-
 builtin/replace.c                    |   2 +-
 builtin/reset.c                      |   1 +
 builtin/rev-parse.c                  |   4 +-
 builtin/revert.c                     |   6 +-
 builtin/rm.c                         |   1 +
 builtin/submodule--helper.c          |   1 +
 builtin/update-index.c               |   1 +
 builtin/write-tree.c                 |   1 +
 cache-tree.h                         |   2 +-
 cache.h                              |  35 +--
 convert.c                            |   1 -
 diff.h                               |   2 +-
 dir.c                                |   1 -
 git.c                                |   4 +-
 list-objects-filter-options.c        |   2 +-
 list-objects-filter.c                |   7 +-
 list-objects-filter.h                |   1 +
 list-objects.c                       |   3 +
 merge-recursive.c                    | 194 ++++++------
 merge-recursive.h                    |   6 +-
 merge.c                              |   4 +-
 name-hash.c                          |   1 -
 notes-merge.c                        |  16 +-
 notes-merge.h                        |   6 +-
 pathspec.c                           |   1 -
 preload-index.c                      |  11 +-
 read-cache.c                         |  44 ++-
 ref-filter.c                         |   2 +-
 repository.c                         |   9 +
 repository.h                         |  16 +
 rerere.c                             |   8 +-
 rerere.h                             |   2 +-
 revision.c                           |  12 +-
 revision.h                           |   2 +-
 sequencer.c                          | 435 +++++++++++++++------------
 sequencer.h                          |  27 +-
 sha1-name.c                          |  56 ++--
 submodule.c                          |   1 -
 t/helper/test-dump-fsmonitor.c       |   4 +-
 t/helper/test-dump-untracked-cache.c |   1 +
 t/helper/test-tool.h                 |   1 +
 transport.c                          |   7 +-
 transport.h                          |   3 +-
 tree.c                               |   1 -
 unpack-trees.c                       |   1 -
 wt-status.c                          |  97 +++---
 wt-status.h                          |  21 +-
 84 files changed, 673 insertions(+), 508 deletions(-)

2.19.1.647.g708186aaf9