[PATCH v2 0/2] Handle git_path() with lock files correctly in worktrees

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I stumbled over this during my recent work in Git GUI
[https://github.com/gitgitgadget/git/pull/361] that was originally really
only intended to use the correct hooks directory.

It turns out that my fears that index.lock was mishandled were unfounded,
hence this patch series has a lot lower priority for me than "OMG we must
push this into v2.24.0!".

Technically, the first patch is not needed (because I decided against adding
a test to t1400 in the end, in favor of t1500), but it shouldn't hurt,
either.

Changes since v1:

 * Clarified the commit message to state that index.lock is fine, it is 
   logs/HEAD.lock that isn't.

Johannes Schindelin (2):
  t1400: wrap setup code in test case
  git_path(): handle `.lock` files correctly

 path.c                |  4 ++--
 t/t1400-update-ref.sh | 18 ++++++++++--------
 t/t1500-rev-parse.sh  | 15 +++++++++++++++
 3 files changed, 27 insertions(+), 10 deletions(-)


base-commit: 108b97dc372828f0e72e56bbb40cae8e1e83ece6
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-401%2Fdscho%2Flock-files-in-worktrees-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-401/dscho/lock-files-in-worktrees-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/401

Range-diff vs v1:

 1:  cf97c5182e = 1:  cf97c5182e t1400: wrap setup code in test case
 2:  f08c90ea02 ! 2:  93dba5a3a3 git_path(): handle `.lock` files correctly
     @@ -3,8 +3,9 @@
          git_path(): handle `.lock` files correctly
      
          Ever since worktrees were introduced, the `git_path()` function _really_
     -    needed to be called e.g. to get at the `index`. However, the wrong path
     -    is returned for `index.lock`.
     +    needed to be called e.g. to get at the path to `logs/HEAD` (`HEAD` is
     +    specific to the worktree). However, the wrong path is returned for
     +    `logs/HEAD.lock`.
      
          This does not matter as long as the Git executable is doing the asking,
          as the path for that `index.lock` file is constructed from
     @@ -13,10 +14,12 @@
          However, Git GUI just learned to use `--git-path` instead of appending
          relative paths to what `git rev-parse --git-dir` returns (and as a
          consequence not only using the correct hooks directory, but also using
     -    the correct paths in worktrees other than the main one). And one of the
     -    paths it is looking for is... you guessed it... `index.lock`.
     +    the correct paths in worktrees other than the main one). While it does
     +    not seem as if Git GUI in particular is asking for `logs/HEAD.lock`,
     +    let's be safe rather than sorry.
      
     -    So let's make that work as script writers would expect it to.
     +    Side note: Git GUI _does_ ask for `index.lock`, but that is already
     +    resolved correctly.
      
          Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
      

-- 
gitgitgadget



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