[RFC/PATCH 00/10] Support using submodules with worktrees

Since this topic has come up twice recently, I'll take this opportunity to gather early comments on this series. It depends nd/config-move-to and at least has one known problem reported Tomasz. But I'll fix that later once nd/config-move-to lands.

For more details, head for 01/10. This basically makes it possible to create secondary worktrees in either supermodules or submodules. The user will be required to turn on extensions.worktreeConfig and this is something I'll need to work on, to make the transition smoother.

Note that while it works, it's not really optimal because worktree clones of the same submodule could be duplicated. But hopefully I could tackle this one step at a time. Make it work first, shake out bugs, then think about sharing repos.

Nguyễn Thái Ngọc Duy (10):
  doc: about submodule support with multiple worktrees
  submodule--helper: add missing \n
  submodule add: support multiple worktrees
  submodule init: support multiple worktrees
  submodule update: add tests for multiple worktrees
  submodule sync: support multiple worktrees
  submodule deinit: support multiple worktrees
  submodule clone: use repo_config_set()
  submodule clone: propagate extensions.worktreeConfig
  submodule ensure-core-worktree: write to config.worktree

 Documentation/git-worktree.txt  |   8 ++
 Documentation/gitsubmodules.txt |  17 +++++
 builtin/submodule--helper.c     |  86 ++++++++++++----------
 config.c                        |  10 +++
 config.h                        |   1 +
 git-submodule.sh                |   8 +-
 repository.c                    |  21 ++++--
 repository.h                    |   4 +
 t/t2405-worktree-submodules.sh  | 125 ++++++++++++++++++++++++++++++++
 9 files changed, 228 insertions(+), 52 deletions(-)
 create mode 100755 t/t2405-worktree-submodules.sh