Commit message hook not working with work-trees

[Rossi1337]

Version

7.0.0.202409031743-r

Operating System

Windows

Bug description

Not sure if this is a bug or more a feature request.
We use Eclipse with work-trees. This is not fully supported yet but works when you create the worktrees on the command line. Checkout branch A into one worktree and checkout branch B into another one.

Now you can open branch A in one Eclipse workspace and branch B in another. Committing pulling and pushing all works. But we have an issue with commit hooks.

We have activated a commit message hook. This works on the first worktree A but not on B.
The command line parameter $1 which should point to the file with the commit message is "empty".

When committing on branch A the file is passed to the hook as .git/COMMIT_EDITMSG that works fine.
But on B it does not work. Most likely because then the file will be written to .git\worktrees\branch-B\COMMIT_EDITMSG and the code that invokes the commit hook does not look there? Just guessing for now but this is what I think is going wrong and why the parameter is empty.

How to reproduce:

With git command line tools

• On a repo checkout branch A into a folder
• Checkout another branch B into another folder as separate work-tree
• Activate commit hook support: may need some additional setup on Windows with Cygwin

With Eclipse

• Create workspace A and import projects

• Create another workspace B and import projects

• Do a change in workspace 1 and commit it in Eclipse

• Check the printed message and it will be .git/COMMIT_EDITMSG

• Create a simple commit hook in .git/hooks/commit-msg to print $1

• Do a change in workspace B and commit it in Eclipse

• Check the printed message and it will be empty

Actual behavior

commit-msg commit hook is not invoked correctly when work-trees are involved. The parameter to pass the COMMIT_EDITMSG file is empty.

Expected behavior

The commit-msg script should be invoked with parameter 1 pointing to the correct COMMIT_EDITMSG file in the work-trees folder.

Relevant log output

Other information

No response