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Jérome Perrin authored Nov 28, 2025 and Kirill Smelkov committed Nov 28, 2025

This .keep empty file was here because git does not keep empty
directories, but the expected status for the test was to have empty
directories. After updating from git 2.48.0 to 2.52.0 this started to
cause test failures with:

    error: refs/.keep: badRefName: invalid refname format

Instead of using marker files, do not store these empty directories in
git and create them during the test setup.

--------
kirr:

The new git behaviour was introduced in https://git.kernel.org/pub/scm/git/git.git/commit/?id=1c31be45b3b2,
and even if we try to rename .keep to e.g. _keep.lock `git fsck` passes
on name check, but then fails with checking ref content.

Adjusted patch:

- do os.MkdirAll without first statting and checking os.IsNotExist for the
  path because

	$ go doc os.mkdirall
	package os // import "."

	func MkdirAll(path string, perm FileMode) error
	    MkdirAll creates a directory named path, along with any necessary parents,
	    a...