Cannot import from poetry

[yajo]

• I have searched the issue tracker and believe that this is not a duplicate.

Make sure you run commands with -v flag before pasting the output.

Steps to reproduce

In a poetry project root, trying to follow the instructions to import it to pdm.

Actual behavior

➤ pdm --version
pdm, version 1.3.0

➤ pdm import -vf poetry pyproject.toml
Traceback (most recent call last):
  File "/var/home/yajo/.local/bin/pdm", line 8, in <module>
    sys.exit(main())
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 73, in __call__
    return self.main(*args, **kwargs)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 112, in main
    raise err.with_traceback(traceback)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 108, in main
    f(options.project, options)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/commands/import_cmd.py", line 25, in handle
    do_import(project, options.filename, options.format)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/actions.py", line 519, in do_import
    project_data, settings = FORMATS[key].convert(project, filename)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/formats/poetry.py", line 171, in convert
    with open(filename, encoding="utf-8") as fp, cd(os.path.dirname(filename)):
  File "/usr/lib64/python3.9/contextlib.py", line 117, in __enter__
    return next(self.gen)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/utils.py", line 290, in cd
    os.chdir(path)
FileNotFoundError: [Errno 2] No such file or directory: ''

➤ pdm import -vf poetry .
Traceback (most recent call last):
  File "/var/home/yajo/.local/bin/pdm", line 8, in <module>
    sys.exit(main())
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 73, in __call__
    return self.main(*args, **kwargs)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 112, in main
    raise err.with_traceback(traceback)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 108, in main
    f(options.project, options)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/commands/import_cmd.py", line 25, in handle
    do_import(project, options.filename, options.format)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/actions.py", line 519, in do_import
    project_data, settings = FORMATS[key].convert(project, filename)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/formats/poetry.py", line 171, in convert
    with open(filename, encoding="utf-8") as fp, cd(os.path.dirname(filename)):
IsADirectoryError: [Errno 21] Is a directory: '.'

Expected behavior

Import successful.

Environment Information

➤ pdm -v info && pdm -v info --env
Traceback (most recent call last):
  File "/var/home/yajo/.local/bin/pdm", line 8, in <module>
    sys.exit(main())
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 73, in __call__
    return self.main(*args, **kwargs)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 112, in main
    raise err.with_traceback(traceback)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/core.py", line 108, in main
    f(options.project, options)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/commands/info.py", line 29, in handle
    actions.do_info(project, options.python, options.where, options.env)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/cli/actions.py", line 478, in do_info
    python_path = project.environment.python_executable
  File "/usr/lib64/python3.9/functools.py", line 969, in __get__
    val = self.func(instance)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/project/core.py", line 159, in environment
    return Environment(self)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/models/environment.py", line 94, in __init__
    self.python_requires = project.python_requires
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/project/core.py", line 163, in python_requires
    return PySpecSet(self.meta.requires_python)
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/pdm/project/core.py", line 412, in meta
    return Metadata(self.pyproject_file, self.pyproject["project"])
  File "/var/home/yajo/.local/pipx/venvs/pdm/lib64/python3.9/site-packages/tomlkit/container.py", line 576, in __getitem__
    raise NonExistentKey(key)
tomlkit.exceptions.NonExistentKey: 'Key "project" does not exist.'

[yajo]

I guess python-poetry/poetry#3332 is related. Poetry stores project metadata in a section called [tool.poetry].

[yajo]

Oh, weird. I found the workaround: prepend ./ to the file name:

➤ pdm import -vf poetry ./pyproject.toml
Changes are written to pyproject.toml.