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Pip build fails: FileNotFoundError: [Errno 2] No such file or directory: 'scripts/__init__.py' #571

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@elmeriniemela

Description

@elmeriniemela

Reproduce:

  • pip install --upgrade pip setuptools wheel
  • CMAKE_ARGS="-DOPENCV_ENABLE_NONFREE=ON" pip install -v --no-binary=opencv-contrib-python opencv-contrib-python

Related commit: 6a1f61b#diff-60f61ab7a8d1910d86d9fda2261620314edcae5894d5aaa236b821c7256badd7R389

Related PR: #563

Error:

Configuring Project
    Working directory:
      /tmp/pip-install-ais_cble/opencv-python_36817dc5e0834847b9d8f8f1dc7bd3c4/_skbuild/linux-x86_64-3.8/cmake-build
    Command:
      cmake /tmp/pip-install-ais_cble/opencv-python_36817dc5e0834847b9d8f8f1dc7bd3c4/opencv -G Ninja -DCMAKE_INSTALL_PREFIX:PATH=/tmp/pip-install-ais_cble/opencv-python_36817dc5e0834847b9d8f8f1dc7bd3c4/_skbuild/linux-x86_64-3.8/cmake-install -DPYTHON_EXECUTABLE:FILEPATH=/home/elmeri/.venv/ml/bin/python3.8 -DPYTHON_VERSION_STRING:STRING=3.8.12 -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 -DPYTHON_LIBRARY:FILEPATH=/usr/lib/libpython3.8.so -DSKBUILD:INTERNAL=TRUE -DCMAKE_MODULE_PATH:PATH=/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/skbuild/resources/cmake -DPYTHON3_EXECUTABLE=/home/elmeri/.venv/ml/bin/python3.8 -DPYTHON3_INCLUDE_DIR=/usr/include/python3.8 -DPYTHON3_LIBRARY=/usr/lib/libpython3.8.so -DBUILD_opencv_python3=ON -DBUILD_opencv_python2=OFF -DBUILD_opencv_java=OFF -DOPENCV_PYTHON3_INSTALL_PATH=python -DINSTALL_CREATE_DISTRIB=ON -DBUILD_opencv_apps=OFF -DBUILD_opencv_freetype=OFF -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_DOCS=OFF -DOPENCV_ENABLE_NONFREE=ON -DCMAKE_BUILD_TYPE:STRING=Release

  Copying files from CMake output
  Traceback (most recent call last):
    File "/home/elmeri/.venv/ml/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 349, in <module>
      main()
    File "/home/elmeri/.venv/ml/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 331, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/elmeri/.venv/ml/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 248, in build_wheel
      return _build_backend().build_wheel(wheel_directory, config_settings,
    File "/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 221, in build_wheel
      return self._build_with_temp_dir(['bdist_wheel'], '.whl',
    File "/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 207, in _build_with_temp_dir
      self.run_setup()
    File "/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 258, in run_setup
      super(_BuildMetaLegacyBackend,
    File "/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 150, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 496, in <module>
      main()
    File "setup.py", line 248, in main
      skbuild.setup(
    File "/tmp/pip-build-env-bo2trral/overlay/lib/python3.8/site-packages/skbuild/setuptools_wrap.py", line 625, in setup
      _classify_installed_files(cmake_manifest, package_data, package_prefixes,
    File "setup.py", line 381, in _classify_installed_files_override
      with open('scripts/__init__.py', 'r') as custom_init:
  FileNotFoundError: [Errno 2] No such file or directory: 'scripts/__init__.py'
  Building wheel for opencv-python (pyproject.toml) ... error
  ERROR: Failed building wheel for opencv-python
Failed to build opencv-python
ERROR: Could not build wheels for opencv-python, which is required to install pyproject.toml-based projects

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