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[PATCH 0/6] Add "git config --move-to"

This is a continuation of nd/per-worktree-config, fixing is small
things from that series and prepares to make submodules work in
multiple worktrees.

The first thing is adding API for updating per-worktree config in
03/06. When submodule code wants to write to a per-worktree config,
calling this function takes care of both single and multi worktree
setups, similar to "git config --worktree <name> <value>"

The second thing is "git config --move-to" and friends. This helps
the config transition right after enabling extensions.worktreeConfig,
when the user has to make sure per-worktree config stays in
per-worktree file.

Manual moving config from one file to another is possible with a
couple keys like core.worktree, but once you have to move multiple
groups (i.e.  "submodule.*.*" keys) then it becomes a lot less fun and
more pain. This simplifies that work (and also migration

Note that I added --move-glob-to because I think glob fits much better
than regex for matching keys because of the dots in config keys. I
added --move-regex-to anyway because we have --get-regexp. Maybe I
should add --get-glob too (but probably not now).

There is also a NEEDSWORK in 03/06. But I hope it could be addressed
after this series is merged (so that I could continue pushing
submodule changes out)

Nguyễn Thái Ngọc Duy (6):
  config.c: avoid git_path() in do_git_config_sequence()
  worktree.c: add get_worktree_config()
  config.c: add repo_config_set_worktree_gently()
  config: use OPT_FILENAME()
  config: factor out set_config_source_file()
  config: add --move-to

 Documentation/git-config.txt   |  12 ++
 Documentation/git-worktree.txt |  16 ++-
 builtin/config.c               | 244 ++++++++++++++++++++++++---------
 config.c                       |  55 +++++++-
 config.h                       |   3 +
 t/t1300-config.sh              |  54 ++++++++
 worktree.c                     |  16 +++
 worktree.h                     |   7 +
 8 files changed, 330 insertions(+), 77 deletions(-)