ls-file-collection misinterprets argument as a path for gittree

[mih]

Here is the demo:

% datalad ls-file-collection gittree .
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/datalad/cli/main.py", line 190, in _run_with_exception_handler
    return cmdlineargs.func(cmdlineargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/cli/exec.py", line 107, in call_from_parser
    ret = list(ret)
          ^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad_next/patches/interface_utils.py", line 218, in _execute_command_
    for r in _process_results(
  File "/usr/lib/python3/dist-packages/datalad/interface/utils.py", line 319, in _process_results
    for res in results:
  File "/usr/lib/python3/dist-packages/datalad_next/commands/ls_file_collection.py", line 405, in __call__
    for item in collection.iter:
  File "/usr/lib/python3/dist-packages/datalad_next/iter_collections/gittree.py", line 112, in iter_gittree
    for line in _git_ls_tree(path, treeish, *lstree_args):
  File "/usr/lib/python3/dist-packages/datalad_next/iter_collections/gittree.py", line 130, in _git_ls_tree
    with iter_git_subproc(
  File "/usr/lib/python3.11/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/usr/lib/python3/dist-packages/datalad_next/iterable_subprocess/iterable_subprocess.py", line 192, in iterable_subprocess
    raise CommandError(
datalad.runner.exception.CommandError: <exception str() failed>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/datalad", line 33, in <module>
    sys.exit(load_entry_point('datalad==0.19.5', 'console_scripts', 'datalad')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/cli/main.py", line 143, in main
    _run(cmdlineargs)
  File "/usr/lib/python3/dist-packages/datalad/cli/main.py", line 169, in _run
    else _run_with_exception_handler(namespace)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/cli/main.py", line 212, in _run_with_exception_handler
    exit_code = _communicate_commanderror(exc) or exit_code
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/cli/main.py", line 225, in _communicate_commanderror
    exc_msg = exc.to_str(include_output=False)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/runner/exception.py", line 61, in to_str
    join_cmdline(cmd) if isinstance(cmd, list) else cmd
    ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/utils.py", line 2672, in join_cmdline
    return ' '.join(map(quote_cmdlinearg, args))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/datalad/utils.py", line 2656, in quote_cmdlinearg
    ) if on_windows else shlex_quote(arg)
                         ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/shlex.py", line 329, in quote
    if _find_unsafe(s) is None:
       ^^^^^^^^^^^^^^^
TypeError: expected string or bytes-like object, got 'PosixPath'

Using HEAD instead of . results in an expected behavior.

Instead of crashing, it should determine that . is not a valid tree-ish:

% git ls-tree .
fatal: Not a valid object name .