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`pip install` from local dir failed on importing files from repo.

See original GitHub issue

setuptools version

57.0.0/57.1.0

Python version

3.6

OS

CentOS 7/Ubuntu 18.04

Additional environment information

pip 21.1.3 wheel 0.36.2

Description

We’re having trouble building pytorch recently. Seems it tries to import from its own repo but cannot: https://github.com/pytorch/pytorch/blob/05c1e5b65571d2fa14b0f06c37ba970fd7cc43d0/setup.py#L219

    File "setup.py", line 219, in <module>
      from tools.build_pytorch_libs import build_caffe2
  ModuleNotFoundError: No module named 'tools'

The failing import is in the very early place of setup.py, before actual code, and has been there for long. I cannot tell whether this issue is from pip or setuptools, so filed based on what’s in the stack trace.

  Successfully installed setuptools-57.0.0 wheel-0.36.2
  WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
  Removed build tracker: '/tmp/pip-req-tracker-kcpyqhnm'
  Installing build dependencies ... done              
  Running command /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpfn5afm8_
  Traceback (most recent call last):
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 280, in <module>
      main()                                                                    
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 263, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 114, in get_requires_for_build_wheel
      return hook(config_settings)
    File "/tmp/pip-build-env-z43ukowd/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 155, in get_requires_for_build_wheel
      config_settings, requirements=['wheel'])
    File "/tmp/pip-build-env-z43ukowd/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 135, in _get_build_requires
      self.run_setup()      
    File "/tmp/pip-build-env-z43ukowd/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 150, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 219, in <module>
      from tools.build_pytorch_libs import build_caffe2
  ModuleNotFoundError: No module named 'tools'
  Getting requirements to build wheel ... error
WARNING: Discarding file:///tmp/scratch/pytorch. Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpfn5afm8_ Check the logs for
 full command output.
ERROR: Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpfn5afm8_ Check the logs for full command output.
Exception information:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 180, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 205, in wrapper
    return func(self, options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 319, in run
    reqs, check_supported_wheels=not options.target_dir
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 104, in resolve
    req, requested_extras=()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 444, in make_requirement_from_install_req
    raise self._build_failures[ireq.link]
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 205, in _make_candidate_from_link
    version=version,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 312, in __init__
    version=version,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 151, in __init__
    self.dist = self._prepare()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 234, in _prepare
    dist = self._prepare_distribution()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 318, in _prepare_distribution
    self._ireq, parallel_builds=True
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 508, in prepare_linked_requirement
    return self._prepare_linked_requirement(req, parallel_builds)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 571, in _prepare_linked_requirement
    req, self.req_tracker, self.finder, self.build_isolation,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 60, in _get_prepared_distribution
    abstract_dist.prepare_distribution_metadata(finder, build_isolation)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/distributions/sdist.py", line 34, in prepare_distribution_metadata
    self._setup_isolation(finder)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/distributions/sdist.py", line 88, in _setup_isolation
    reqs = backend.get_requires_for_build_wheel()
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 169, in get_requires_for_build_wheel
    'config_settings': config_settings
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 268, in _call_hook
    extra_environ=extra_environ
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/subprocess.py", line 278, in runner
    spinner=spinner,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/subprocess.py", line 244, in call_subprocess
    raise InstallationSubprocessError(proc.returncode, command_desc)
pip._internal.exceptions.InstallationSubprocessError: Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpfn5afm8_ Check the log
s for full command output.
Removed file:///tmp/scratch/pytorch from build tracker '/tmp/pip-req-tracker-kcpyqhnm'
Removed build tracker: '/tmp/pip-req-tracker-kcpyqhnm'

Local repo

[root@ff8bb53a4a06 pytorch]# pwd
/tmp/scratch/pytorch
[root@ff8bb53a4a06 pytorch]# ls -la tools/build_pytorch_libs.py 
-rw-r--r-- 1 root root 2698 Jul  4 18:01 tools/build_pytorch_libs.py
[root@ff8bb53a4a06 pytorch]# python3 -m pip install -Uv .
Using pip 21.1.3 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)
Value for scheme.platlib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/lib64/python3.6/site-packages
sysconfig: /usr/lib64/python3.6/site-packages
Value for scheme.purelib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/lib/python3.6/site-packages
sysconfig: /usr/lib/python3.6/site-packages
Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/include/python3.6m/UNKNOWN
sysconfig: /usr/include/python3.6m/UNKNOWN
Value for scheme.scripts does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local/bin
sysconfig: /usr/bin
Value for scheme.data does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /usr/local
sysconfig: /usr
Additional context:
user = False
home = None
root = None
prefix = None
Non-user install because site-packages writeable
Created temporary directory: /tmp/pip-ephem-wheel-cache-8ir56xxf
Created temporary directory: /tmp/pip-req-tracker-ryunaqfh
Initialized build tracking at /tmp/pip-req-tracker-ryunaqfh
Created build tracker: /tmp/pip-req-tracker-ryunaqfh
Entered build tracker: /tmp/pip-req-tracker-ryunaqfh
Created temporary directory: /tmp/pip-install-pqloyx7p
Processing /tmp/scratch/pytorch
  Created temporary directory: /tmp/pip-req-build-w7_n2r71
  DEPRECATION: A future pip version will change local packages to be built in-place without first copying to a temporary directory. We recommend you use --use-feature=in-tree-build to test your packages with this new behavior before it becomes the default.
   pip 21.3 will remove support for this functionality. You can find discussion regarding this at https://github.com/pypa/pip/issues/7555.

...<a huge chunk of "Found link">...

    Found link https://files.pythonhosted.org/packages/bb/10/44230dd6bf3563b8f227dbf344c908d412ad2ff48066476672f3a72e174e/wheel-0.33.4-py2.py3-none-any.whl#sha256=5e79117472686ac0c4aef5bad5172ea73a1c2d1646b808c35926bd26bdfb0c08 (from https://pypi.org/sim
ple/wheel/) (requires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*), version: 0.33.4                                                 
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equires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*), version: 0.33.4                                                                    
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ple/wheel/) (requires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*), version: 0.33.5                                             
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ple/wheel/) (requires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*), version: 0.33.6
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equires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*), version: 0.33.6
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ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.34.0                                                                                                                                                                      Found link https://files.pythonhosted.org/packages/15/39/728ccb81172c73f14084948b2d4561d5e51649dcf4b21d1f207b7363b1d7/wheel-0.34.0.tar.gz#sha256=a69231973dccde8558f80f2ef058335a1d0bc1b55b2a5a2dfb5097e151e3c498 (from https://pypi.org/simple/wheel/) (r
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ple/wheel/) (requires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*), version: 0.34.1
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equires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*), version: 0.34.1
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ple/wheel/) (requires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*), version: 0.34.2
    Found link https://files.pythonhosted.org/packages/75/28/521c6dc7fef23a68368efefdcd682f5b3d1d58c2b90b06dc1d0b805b51ae/wheel-0.34.2.tar.gz#sha256=8788e9155fe14f54164c1b9eb0a319d98ef02c160725587ad60f14ddc57b6f96 (from https://pypi.org/simple/wheel/) (r
equires-python:>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*), version: 0.34.2
    Found link https://files.pythonhosted.org/packages/85/37/7252beacf7e60cffe3bc5a97f94e3ccf22a927e87697d377cfe16abea7cf/wheel-0.35.0-py2.py3-none-any.whl#sha256=64a0d73747636637479b8b8741f9304bee7a568c80e4029eeb9529ef134b471d (from https://pypi.org/sim
ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.35.0
    Found link https://files.pythonhosted.org/packages/5b/e1/fa6dccd0d461520fbaa98d47cdf1ba26d5a2666e24b454d0e27387420e4b/wheel-0.35.0.tar.gz#sha256=625e645aae0706ad09690bded523196a065fbcf9afcdb2d713b59e01ef8699c0 (from https://pypi.org/simple/wheel/) (r
equires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.35.0
    Found link https://files.pythonhosted.org/packages/a7/00/3df031b3ecd5444d572141321537080b40c1c25e1caa3d86cdd12e5e919c/wheel-0.35.1-py2.py3-none-any.whl#sha256=497add53525d16c173c2c1c733b8f655510e909ea78cc0e29d374243544b77a2 (from https://pypi.org/sim
ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.35.1
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ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.0
    Found link https://files.pythonhosted.org/packages/57/73/1911bfa69482de2a6327db4ca5eda87ae7599160018910007d6d6a1d3ada/wheel-0.36.0.tar.gz#sha256=e17f05e14282d0e666327f800ef43123b40f3dbc13a86193b604f2ebfae0dabc (from https://pypi.org/simple/wheel/) (r
equires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.0
    Found link https://files.pythonhosted.org/packages/c9/0b/e0fd299d93cd9331657f415085a4956422959897b333e3791dde40bd711d/wheel-0.36.1-py2.py3-none-any.whl#sha256=906864fb722c0ab5f2f9c35b2c65e3af3c009402c108a709c0aca27bc2c9187b (from https://pypi.org/sim
ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.1
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equires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.1
    Found link https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl#sha256=78b5b185f0e5763c26ca1e324373aadd49182ca90e825f7853f4b2509215dc0e (from https://pypi.org/sim
ple/wheel/) (requires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.2
    Found link https://files.pythonhosted.org/packages/ed/46/e298a50dde405e1c202e316fa6a3015ff9288423661d7ea5e8f22f589071/wheel-0.36.2.tar.gz#sha256=e11eefd162658ea59a60a0f6c7d493a7190ea4b9a85e335b33489d9f17e0245e (from https://pypi.org/simple/wheel/) (r
equires-python:!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7), version: 0.36.2          
  Skipping link: not a file: https://pypi.org/simple/wheel/                                                                                                                                                                                                   
  Given no hashes to check 104 links for project 'wheel': discarding no candidates
  Collecting wheel                                                                                                                                                                                                                                            
    Created temporary directory: /tmp/pip-unpack-arfgeyyi                               
    Looking up "https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl" in the cache                                                                                    
    Current age based on date: 85916                                      
    Ignoring unknown cache-control directive: immutable                                                                                                                                                                                                       
    Freshness lifetime from max-age: 365000000                                          
    The response is "fresh", returning cached response                                                                                                                                                                                                        
    365000000 > 85916                                                     
    Using cached wheel-0.36.2-py2.py3-none-any.whl (35 kB)                                                                                                                                                                                                    
    Added wheel from https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl#sha256=78b5b185f0e5763c26ca1e324373aadd49182ca90e825f7853f4b2509215dc0e to build tracker '/t
mp/pip-req-tracker-t0avr3r3'                                                                                                                                                                                                                                      Removed wheel from https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl#sha256=78b5b185f0e5763c26ca1e324373aadd49182ca90e825f7853f4b2509215dc0e from build tracker
 '/tmp/pip-req-tracker-t0avr3r3'                                                                                                                                                                                                                              
  Created temporary directory: /tmp/pip-unpack-v80az1kj                                 
  Installing collected packages: wheel, setuptools                                                                                                                                                                                                            
                                                                          
    Creating /tmp/pip-build-env-5rq6gdb4/overlay/bin
    changing mode of /tmp/pip-build-env-5rq6gdb4/overlay/bin/wheel to 755

  Successfully installed setuptools-57.1.0 wheel-0.36.2
  WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
  Removed build tracker: '/tmp/pip-req-tracker-t0avr3r3'
  Installing build dependencies ... done
  Running command /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpq2p9mz22
  Traceback (most recent call last):
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 280, in <module>
      main()
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 263, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 114, in get_requires_for_build_wheel
      return hook(config_settings)
    File "/tmp/pip-build-env-5rq6gdb4/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 155, in get_requires_for_build_wheel
      config_settings, requirements=['wheel'])
    File "/tmp/pip-build-env-5rq6gdb4/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 135, in _get_build_requires
      self.run_setup()
    File "/tmp/pip-build-env-5rq6gdb4/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 150, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 219, in <module>
      from tools.build_pytorch_libs import build_caffe2
  ModuleNotFoundError: No module named 'tools'
  Getting requirements to build wheel ... error
WARNING: Discarding file:///tmp/scratch/pytorch. Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpq2p9mz22 Check the logs for
 full command output.
ERROR: Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpq2p9mz22 Check the logs for full command output.
Exception information:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 180, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 205, in wrapper
    return func(self, options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 319, in run
    reqs, check_supported_wheels=not options.target_dir
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 104, in resolve
    req, requested_extras=()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 444, in make_requirement_from_install_req
    raise self._build_failures[ireq.link]
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 205, in _make_candidate_from_link
    version=version,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 312, in __init__
    version=version,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 151, in __init__
    self.dist = self._prepare()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 234, in _prepare
    dist = self._prepare_distribution()
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 318, in _prepare_distribution
    self._ireq, parallel_builds=True
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 508, in prepare_linked_requirement
    return self._prepare_linked_requirement(req, parallel_builds)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 571, in _prepare_linked_requirement
    req, self.req_tracker, self.finder, self.build_isolation,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 60, in _get_prepared_distribution
    abstract_dist.prepare_distribution_metadata(finder, build_isolation)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/distributions/sdist.py", line 34, in prepare_distribution_metadata
    self._setup_isolation(finder)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/distributions/sdist.py", line 88, in _setup_isolation
    reqs = backend.get_requires_for_build_wheel()
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 169, in get_requires_for_build_wheel
    'config_settings': config_settings
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 268, in _call_hook
    extra_environ=extra_environ
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/subprocess.py", line 278, in runner
    spinner=spinner,
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/subprocess.py", line 244, in call_subprocess
    raise InstallationSubprocessError(proc.returncode, command_desc)
pip._internal.exceptions.InstallationSubprocessError: Command errored out with exit status 1: /usr/bin/python3 /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpq2p9mz22 Check the log
s for full command output.
Removed file:///tmp/scratch/pytorch from build tracker '/tmp/pip-req-tracker-t0avr3r3'
Removed build tracker: '/tmp/pip-req-tracker-t0avr3r3'

Code of Conduct

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Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:12 (8 by maintainers)

github_iconTop GitHub Comments

5reactions
laydaycommented, Oct 18, 2021

backend-path exists to support in-tree backends, it’s not meant to be used to add cwd on sys.path and pep517 (the library) actually enforces this - if you use backend-path but build-backend is not imported from backend-path, it errors out.

2reactions
jaracocommented, Nov 24, 2021

Do you happen to know the reason behind [removing the implicit current-working-directory-on-path]?

I believe the rationale is that some packages might not want cwd on sys.path, causing packages in the local directory to mask installed packages. For example, if a package provided a setup module, it would not be importable if there’s a setup.py script in the local directory.

I’m not sure why I suggested sys.path manipulation. I believe there’s a better supported mechanism in PEP 517, namely backend-path:

# pyproject.toml
[build-system]
backend-path = ["."]

That of course requires a PEP 517-based build, which still doesn’t support editable installs, so you may still need a sys.path hack for editable installs.

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