Unable to checkout repository ending in a dot on Windows

[eXpl0it3r]

Steps to Reproduce

• Create a repository that ends in a dot (e.g. G.A.B.R.)
• Write a GitHub Actions workflow that uses actions/checkout and a Windows platform
• Run the workflow

Actual Behavior

All Windows builds fail with the error along the lines of: Directory 'D:\a\G.A.B.R.\G.A.B.R.' does not exist
That's because Windows doesn't allow directories that end with a ., thus the directory is never created.

Expected Behavior

A valid working directory is picked on Windows platforms.
Maybe, if desired, a warning message is printed, indicating of the directory name mismatch, due to Windows.

Example

I created an example repository for this: G.A.B.R.
And ran GitHub Actions on two different branches:

• Plain checkout
• Checkout with path
• Trying to use a different parent doesn't work (for obvious reasons)

If anyone knows a workaround, let me know. 🙂