[PATCH 0/2] Ensure unique worktree ids across repositories

[Caleb White <cdwhite3@pm.me>]

The `es/worktree-repair-copied` topic added support for repairing a
worktree from a copy scenario. I noted[1,2] that the topic added the
ability for a repository to "take over" a worktree from another
repository if the worktree_id matched a worktree inside the current
repository which can happen if two repositories use the same worktree name.

This series teaches Git to create worktrees with a unique suffix so
that the worktree_id is unique across all repositories even if they have
the same name. For example creating a worktree `develop` would look like:

    foo/
    ├── .git/worktrees/develop-5445874156/
    └── develop/
    bar/
    ├── .git/worktrees/develop-1549518426/
    └── develop/

The actual worktree directory name is still `develop`, but the
worktree_id is unique and prevents the "take over" scenario. The suffix
is given by the `git_rand()` function, but I'm open to suggestions if
there's a better random or hashing function to use.

[1]: https://lore.kernel.org/git/20241008153035.71178-1-cdwhite3@pm.me/
[2]: https://lore.kernel.org/git/r4zmcET41Skr_FMop47AKd7cms9E8bKPSvHuAUpnYavzKEY6JybJta0_7GfuYB0q-gD-XNcvh5VDTfiT3qthGKjqhS1sbT4M2lUABynOz2Q=@pm.me/

Signed-off-by: Caleb White <cdwhite3@pm.me>
---
Caleb White (2):
      worktree: add worktree with unique suffix
      worktree: rename worktree id during worktree move

 Documentation/git-worktree.txt     |  5 +-
 builtin/worktree.c                 | 30 ++++++++++++
 t/t0035-safe-bare-repository.sh    |  4 +-
 t/t0600-reffiles-backend.sh        | 10 ++--
 t/t0601-reffiles-pack-refs.sh      |  4 +-
 t/t0610-reftable-basics.sh         | 54 +++++++++++-----------
 t/t1407-worktree-ref-store.sh      |  4 +-
 t/t1410-reflog.sh                  | 10 ++--
 t/t1415-worktree-refs.sh           | 26 +++++------
 t/t1450-fsck.sh                    | 14 +++---
 t/t1500-rev-parse.sh               |  6 +--
 t/t2400-worktree-add.sh            | 51 +++++++++++----------
 t/t2401-worktree-prune.sh          | 20 ++++----
 t/t2403-worktree-move.sh           | 38 ++++++++--------
 t/t2405-worktree-submodule.sh      | 10 ++--
 t/t2406-worktree-repair.sh         | 93 ++++++++++++++++++++++++--------------
 t/t2407-worktree-heads.sh          | 27 +++++------
 t/t3200-branch.sh                  | 10 ++--
 t/t5304-prune.sh                   |  2 +-
 t/t7412-submodule-absorbgitdirs.sh |  4 +-
 20 files changed, 239 insertions(+), 183 deletions(-)
---
base-commit: 090d24e9af6e9f59c3f7bee97c42bb1ae3c7f559
change-id: 20241127-wt_unique_ids-1ffd7ea0bb19
prerequisite-change-id: 20241025-wt_relative_options-afa41987bc32:v5
prerequisite-patch-id: 179410e257e8eedf100f4f9faa9467cbbba4d61b
prerequisite-patch-id: 56ffe0afeadd511c9eef5f548a371659b040acab
prerequisite-patch-id: 809c1314e5dfa966f4f3d73b52f286f8aa89370f
prerequisite-patch-id: cf5f9491c8f8e58d1e0e103a5f8c64c55f2896e3
prerequisite-patch-id: 3d3bb3cc81d3030b1d27c39fdb4cf0e383937f89
prerequisite-patch-id: 62a09496d98d78a6bd1f9150ba887ee72359c7ee
prerequisite-patch-id: 5527e4b745963dd4fa08029491fcbfe3d91d5104
prerequisite-patch-id: bf433443e90939a493fa586de30938f78cb77020

Best regards,
-- 
Caleb White <cdwhite3@pm.me>