PyPI install fails with "FileNotFoundError: [Errno 2] No such file or directory: 'fairseq/version.txt'"

🐛 Bug

I’m trying to install fairseq from PyPI and the install is failing to find ‘fairseq/version.txt’.

I was able to install successfully by cloning the code from GitHub and running pip install . in the root directory. My guess is that the installer is expecting to be in the root directory of the code to find fairseq/version.txt and breaks installing from PyPI.

$ pip install fairseq
Collecting fairseq
  Using cached fairseq-0.12.1.tar.gz (9.6 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [18 lines of output]
      Traceback (most recent call last):
        File "/home/argosopentech/temp/env/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>
          main()
        File "/home/argosopentech/temp/env/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/argosopentech/temp/env/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 130, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-iwbeosu0/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 177, in get_requires_for_build_wheel
          return self._get_build_requires(
        File "/tmp/pip-build-env-iwbeosu0/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 159, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-iwbeosu0/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 174, in run_setup
          exec(compile(code, __file__, 'exec'), locals())
        File "setup.py", line 27, in <module>
          version = write_version_py()
        File "setup.py", line 18, in write_version_py
          with open(os.path.join("fairseq", "version.txt")) as f:
      FileNotFoundError: [Errno 2] No such file or directory: 'fairseq/version.txt'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

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