metadata generation failed

[pplonski]

I was trying to create extension with this template. I'm using Ubuntu 20.04 and Python 3.11.

I've used copier to copy the template, I selected frontend extension. Then I run pip install -e "." and got below error message:

pip install -e "."
Obtaining file:///home/piotr/sandbox/myextension
  Installing build dependencies ... done
  Checking if build backend supports build_editable ... done
  Getting requirements to build editable ... done
  Installing backend dependencies ... done
  Preparing editable metadata (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Preparing editable metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [46 lines of output]
      INFO:hatch_jupyter_builder.utils:Running jupyter-builder
      INFO:hatch_jupyter_builder.utils:Building with hatch_jupyter_builder.npm_builder
      INFO:hatch_jupyter_builder.utils:With kwargs: {'build_cmd': 'install:extension', 'npm': ['jlpm'], 'source_dir': 'src', 'build_dir': 'myextension/labextension'}
      INFO:hatch_jupyter_builder.utils:Installing build dependencies with npm.  This may take a while...
      INFO:hatch_jupyter_builder.utils:> /tmp/pip-build-env-ewv84fco/overlay/bin/jlpm install
      Usage Error: The nearest package directory (/home/piotr/sandbox/myextension) doesn't seem to be part of the project declared in /home/piotr.

      - If /home/piotr isn't intended to be a project, remove any yarn.lock and/or package.json file there.
      - If /home/piotr is intended to be a project, it might be that you forgot to list sandbox/myextension in its workspace configuration.
      - Finally, if /home/piotr is fine and you intend sandbox/myextension to be treated as a completely separate project (not even a workspace), create an empty yarn.lock file in it.

      $ yarn install [--json] [--immutable] [--immutable-cache] [--check-cache] [--inline-builds] [--mode #0]
      Traceback (most recent call last):
        File "/home/piotr/sandbox/myextension/extenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 167, in prepare_metadata_for_build_editable
          hook = backend.prepare_metadata_for_build_editable
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      AttributeError: module 'hatchling.build' has no attribute 'prepare_metadata_for_build_editable'

      During handling of the above exception, another exception occurred:

      Traceback (most recent call last):
        File "/home/piotr/sandbox/myextension/extenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/home/piotr/sandbox/myextension/extenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/piotr/sandbox/myextension/extenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 176, in prepare_metadata_for_build_editable
          whl_basename = build_hook(metadata_directory, config_settings)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-ewv84fco/overlay/lib/python3.11/site-packages/hatchling/build.py", line 78, in build_editable
          return os.path.basename(next(builder.build(wheel_directory, ['editable'])))
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-ewv84fco/overlay/lib/python3.11/site-packages/hatchling/builders/plugin/interface.py", line 150, in build
          build_hook.initialize(version, build_data)
        File "/tmp/pip-build-env-ewv84fco/normal/lib/python3.11/site-packages/hatch_jupyter_builder/plugin.py", line 87, in initialize
          raise e
        File "/tmp/pip-build-env-ewv84fco/normal/lib/python3.11/site-packages/hatch_jupyter_builder/plugin.py", line 82, in initialize
          build_func(self.target_name, version, **build_kwargs)
        File "/tmp/pip-build-env-ewv84fco/normal/lib/python3.11/site-packages/hatch_jupyter_builder/utils.py", line 113, in npm_builder
          run([*npm_cmd, "install"], cwd=str(abs_path))
        File "/tmp/pip-build-env-ewv84fco/normal/lib/python3.11/site-packages/hatch_jupyter_builder/utils.py", line 229, in run
          return subprocess.check_call(cmd, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/piotr/.pyenv/versions/3.11.5/lib/python3.11/subprocess.py", line 413, in check_call
          raise CalledProcessError(retcode, cmd)
      subprocess.CalledProcessError: Command '['/tmp/pip-build-env-ewv84fco/overlay/bin/jlpm', 'install']' returned non-zero exit status 1.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[notice] A new release of pip is available: 23.2.1 -> 23.3.1
[notice] To update, run: pip install --upgrade pip

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[pplonski]

To solve the issue I needed to remove the yarn.lock from my home directory.