LookupError: setuptools-scm was unable to detect version for '/tmp'

[radugrosu]

I'm using the following namespace-package structure (the namespace is in this example nametest):

root
├── name-common
│   ├── nametest
│   │   ├── metrics.py
│   │   └── utils.py
│   ├── requirements.txt
│   └── setup.py
├── name-serve
│   ├── nametest
│   │   └── serve
│   │       ├── __init__.py
│   │       └── selector.py
│   ├── requirements.txt
│   └── setup.py
└── setup.py

The full error message when doing pip install . in any of name-common or name-serve is:

    ERROR: Command errored out with exit status 1:
     command: /home/radu/bin/anaconda3/envs/aimtest/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-req-build-cx0dk49_/setup.py'"'"'; __file__='"'"'/tmp/pip-req-build-cx0dk49_/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base pip-egg-info
         cwd: /tmp/pip-req-build-cx0dk49_/
    Complete output (25 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-req-build-cx0dk49_/setup.py", line 11, in <module>
        packages=find_namespace_packages(include=['nametest.*'], exclude=['tests']),
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools/__init__.py", line 145, in setup
        return distutils.core.setup(**attrs)
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools/dist.py", line 446, in __init__
        k: v for k, v in attrs.items()
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/distutils/dist.py", line 281, in __init__
        self.finalize_options()
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools/dist.py", line 734, in finalize_options
        ep.load()(self, ep.name, value)
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools_scm/integration.py", line 17, in version_keyword
        dist.metadata.version = get_version(**value)
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools_scm/__init__.py", line 150, in get_version
        parsed_version = _do_parse(config)
      File "/home/radu/bin/anaconda3/envs/aimtest/lib/python3.6/site-packages/setuptools_scm/__init__.py", line 113, in _do_parse
        "use git+https://github.com/user/proj.git#egg=proj" % config.absolute_root
    LookupError: setuptools-scm was unable to detect version for '/tmp'.
    
    Make sure you're either building from a fully intact git repository or PyPI tarballs. Most other sources (such as GitHub's tarballs, a git checkout without the .git folder) don't contain the necessary metadata and will not work.
    
    For example, if you're using pip, instead of https://github.com/user/proj/archive/master.zip use git+https://github.com/user/proj.git#egg=proj
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

The contents of setup.py are:

from setuptools import setup, find_namespace_packages


setup(
    name='name.common',
    use_scm_version={"root": "..", "relative_to": __file__},
    setup_requires=['setuptools_scm'],
    packages=find_namespace_packages(include=['nametest.*'], exclude=['tests']),
)

When running pip install -e . everything works fine.
I'm not sure how to get around this, would appreciate any input. Thanks.

[RonnyPfannschmidt]

This relates to pip copying around things without nice access to required Metadata,
a conversation with the pip developers has been started, but it is not close to any conclusion

[xhochy]

@RonnyPfannschmidt Is this discussion public anywhere?

[j08lue]

This relates to pip copying around things without nice access to required Metadata,

Is it really? I had the same error message and it was because I by mistake was using use_scm_version={"root": "..", "relative_to": __file__} from the root of my repo, which would always point to the folder containing the repo, like /tmp when pip copies the package to somewhere for building.

@radugrosu, you wrote

The contents of setup.py are: [...] use_scm_version={"root": "..", "relative_to": __file__}

Which of the three setup.py were you referring to? Not the one in the root, I guess, because that would be wrong?

[amerry]

@j08lue I'm seeing this with a much simpler structure:

<root>
├── .git
├── python
│   ├── name
│   │   ├── __init__.py
│   │   └── ...
│   └── setup.py

and when I do pip install . from the python directory, I get (with the traceback elided):

LookupError: setuptools-scm was unable to detect version for 'C:\\Users\\amerry\\AppData\\Local\\Temp'.

It appears that pip has copied the contents of the python dir to C:\Users\amerry\AppData\Local\Temp\tmpttcis7t9, which then means the .git directory is no longer located one up from setup.py.

[RonnyPfannschmidt]

As pip keeps doing that, until I resolved with the pip developers how to do it reliably, i suggest to do editable installs

[loodvn]

FWIW, I found the discussion on pypa/pip#7549 very useful - pip 20.1b1 solved my problem but they have since reverted the fix.
I see this issue is referenced from the pip issue, but just bringing it back here :)

[RonnyPfannschmidt]

thanks for the crosslink