Git fails with `fatal: transport 'file' not allowed`

[langfield]

Here is the stack trace:

Traceback (most recent call last):
  File "/home/runner/work/ki/ki/submodule.py", line 117, in <module>
    main()
  File "<@beartype(__main__.main) at 0x7f761029d1f0>", line 10, in main
  File "/home/runner/work/ki/ki/submodule.py", line 106, in main
    repo.git.submodule("add", args.remote, args.deck)
  File "/opt/hostedtoolcache/Python/3.9.17/x64/lib/python3.9/site-packages/git/cmd.py", line 696, in <lambda>
    return lambda *args, **kwargs: self._call_process(name, *args, **kwargs)
  File "/opt/hostedtoolcache/Python/3.9.17/x64/lib/python3.9/site-packages/git/cmd.py", line 1270, in _call_process
    return self.execute(call, **exec_kwargs)
  File "/opt/hostedtoolcache/Python/3.9.17/x64/lib/python3.9/site-packages/git/cmd.py", line 1064, in execute
    raise GitCommandError(redacted_command, status, stderr_value, stdout_value)
git.exc.GitCommandError: Cmd('git') failed due to: exit code(128)
  cmdline: git submodule add /tmp/pytest-of-runner/pytest-1/test_pull_succeeds_with_new_su0/tmpoaffg316/aa_remote/.git aa
  stderr: 'Cloning into '/tmp/pytest-of-runner/pytest-1/test_pull_succeeds_with_new_su0/tmpoaffg316/multideck/aa'...
fatal: transport 'file' not allowed
fatal: clone of '/tmp/pytest-of-runner/pytest-1/test_pull_succeeds_with_new_su0/tmpoaffg316/aa_remote/.git' into submodule path '/tmp/pytest-of-runner/pytest-1/test_pull_succeeds_with_new_su0/tmpoaffg316/multideck/aa' failed'

And here is the source:

@beartype
def main() -> None:
    """Convert a arbitrary subdeck into a git submodule with remote."""
    # Parse command-line arguments.
    parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter)
    parser.add_argument("--kirepo", required=True, help=HELP_KIREPO.lstrip("\n"))
    parser.add_argument("--deck", required=True, help=HELP_DECK.lstrip("\n"))
    parser.add_argument("--remote", required=True, help=HELP_REMOTE.lstrip("\n"))
    args: argparse.Namespace = parser.parse_args()

    # Make a copy of the given repository.
    kirepo = M.kirepo(F.chk(Path(args.kirepo)))
    repo: git.Repo = kirepo.repo
    head: Rev = M.head(repo)
    copy: git.Repo = cp_repo(head, f"submodule-{head.sha}")
    copyroot: Dir = F.root(copy)

    # Harden all symlinks.
    _ = map(M.hardlink, F.walk(copyroot))

    # Filter ``copy`` to include only the given deck.
    print(f"Operating on '{copyroot}'")
    F.chdir(copyroot)
    arglist: List[str] = ["--subdirectory-filter", args.deck, "--force"]
    gfrargs = git_filter_repo.FilteringOptions.parse_args(arglist, error_on_empty=False)
    git_filter_repo.RepoFilter(gfrargs).run()

    # Clean up.
    copy.git.reset(hard=True)
    copy.git.gc(aggressive=True)
    copy.git.prune()

    # Delete all remotes.
    for remote in copy.remotes:
        copy.delete_remote(remote)
        assert not remote.exists()
    assert len(copy.remotes) == 0

    # Add the new remote.
    remote = copy.create_remote(REMOTE_NAME, args.remote)
    assert remote.exists()

    # Commit in the submodule.
    copy.git.add(all=True)
    copy.index.commit("Initial submodule commit.")
    out = copy.git.push("--set-upstream", REMOTE_NAME, BRANCH_NAME, force=True)
    print(out)

    # Remove the deck and commit the deletion in the original repo.
    F.chdir(kirepo.root)
    try:
        repo.git.rm(args.deck, r=True, f=True)
    except git.exc.GitCommandError as err:
        if "did not match any files" not in err.stderr:
            raise err
    deck = F.chk(Path(args.deck))
    if isinstance(deck, Dir):
        F.rmtree(deck)
    repo.index.commit(f"Remove '{args.deck}'")

    # Add, initialize, and update the submodule.
    repo.git.submodule("add", args.remote, args.deck)
    repo.git.submodule("init")
    repo.git.submodule("update")

    # Commit the addition.
    repo.git.add(".gitmodules", args.deck)
    sha = repo.index.commit(f"Add submodule '{args.deck}' with remote '{args.remote}'")
    print(f"Committed submodule at rev '{sha}'")

Any ideas how to fix this?

[Elijah Newren]

I'm confused; nothing in your stacktrace or code in any way references git-filter-repo and there isn't even a trace of an explanation to claim you're actually using it, so I am at a loss as to why you filed a ticket against this project. Did you just accidentally file it against the wrong project or something?

[langfield]

How about this line:

git_filter_repo.RepoFilter(gfrargs).run()

In the block whose comment starts with # Filter ...?

[langfield]

Okay indeed there was a fix that was unrelated to git filter-repo.

[Elijah Newren]

How about this line:

git_filter_repo.RepoFilter(gfrargs).run()

In the block whose comment starts with # Filter ...?

Oops, yeah, I missed that line.

Okay indeed there was a fix that was unrelated to git filter-repo.

Glad you were able to find it.