override version via an environment variable

Is it possible to ovveride the version via an environment variable ? if not would it be possible to add the feature ? setuptools provides the convenient variable SETUPTOOLS_SCM_PRETEND_VERSION=“0.25.0”; for instance.

My usecase is that pandas if (very) often broken for me so I often need to use the development version. When fetching the code from github via nix, it fetches a tarball thus it misses the .git files. This ends up with pandas having a 0+unknown version. Because my setup.py enforces pandas >= 0.24.2, the pip check fails:

Collecting pandas>=0.24.2 (from mptcpanalyzer==0.3.2.dev0)
  Using cached https://files.pythonhosted.org/packages/b2/4c/b6f966ac91c5670ba4ef0b0b5613b5379e3c7abdfad4e7b89a87d73bae13/pandas-0.24.2.tar.gz
Requirement already satisfied: cmd2>=0.9.12 in /nix/store/9f7v64ns4xwfgm1dmn2aqy5vjmxspi85-python3.7-cmd2-0.9.14/lib/python3.7/site-packages (from mptcpanalyzer==0.3.2.dev0) (0.9.14)
Requirement already satisfied: pbr!=2.1.0,>=2.0.0 in /nix/store/xczj8g0l84dls0sx98j4zpi3cklvba3p-python3.7-pbr-5.1.3/lib/python3.7/site-packages (from stevedore->mptcpanalyzer==0.3.2.dev0) (5.1.3)
Requirement already satisfied: six>=1.10.0 in /nix/store/imf48xfhb9dg8453gx131icwxrgwnwdv-python3.7-six-1.12.0/lib/python3.7/site-packages (from stevedore->mptcpanalyzer==0.3.2.dev0) (1.12.0)
Requirement already satisfied: numpy>=1.10.0 in /nix/store/3ml16mnq11in68sdg8w4jipm7bqcvmh8-python3.7-numpy-1.16.4/lib/python3.7/site-packages (from matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (1.16.4)
Requirement already satisfied: python-dateutil>=2.1 in /nix/store/p59ycm2ijqgbl3x9fzl9968ppyc5wlyl-python3.7-python-dateutil-2.8.0/lib/python3.7/site-packages (from matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (2.8.0)
Requirement already satisfied: cycler>=0.10 in /nix/store/a8dhnlh3j584rkx2mnd9q88yjx0gs3dj-python3.7-cycler-0.10.0/lib/python3.7/site-packages (from matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (0.10.0)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 in /nix/store/rfb33kzfnbm5j7ph9j7qp54cg5y1kgvy-python3.7-pyparsing-2.3.1/lib/python3.7/site-packages (from matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (2.3.1)
Requirement already satisfied: kiwisolver>=1.0.1 in /nix/store/b60xdslw4sxy2mhfc8wl3sx4kll9rav1-python3.7-kiwisolver-1.0.1/lib/python3.7/site-packages (from matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (1.0.1)
Requirement already satisfied: pytz>=2011k in /nix/store/qiri3zhvgb05cccf5mhbricxv95q2pni-python3.7-pytz-2019.1/lib/python3.7/site-packages (from pandas>=0.24.2->mptcpanalyzer==0.3.2.dev0) (2019.1)
Requirement already satisfied: attrs>=16.3.0 in /nix/store/nmzcj7vdqfch4jl4ndmkf1mvdyda4xs4-python3.7-attrs-18.2.0/lib/python3.7/site-packages (from cmd2>=0.9.12->mptcpanalyzer==0.3.2.dev0) (18.2.0)
Requirement already satisfied: pyperclip>=1.5.27 in /nix/store/xs2v9yhg3pgr6wnql2v3b5zwlz5rm145-python3.7-pyperclip-1.7.0/lib/python3.7/site-packages (from cmd2>=0.9.12->mptcpanalyzer==0.3.2.dev0) (1.7.0)
Requirement already satisfied: wcwidth>=0.1.7 in /nix/store/lnzp91myfangqfpdw18sk2yp1x7wyf3r-python3.7-wcwidth-0.1.7/lib/python3.7/site-packages (from cmd2>=0.9.12->mptcpanalyzer==0.3.2.dev0) (0.1.7)
Requirement already satisfied: colorama in /nix/store/xx29yp120h6p9fjwwgvazdr8iharpj01-python3.7-colorama-0.4.1/lib/python3.7/site-packages (from cmd2>=0.9.12->mptcpanalyzer==0.3.2.dev0) (0.4.1)
Requirement already satisfied: setuptools in /nix/store/pwqjs8nz67h4rid05vwma9z8fbsfmm16-python3.7-bootstrapped-pip-19.1.1/lib/python3.7/site-packages (from kiwisolver>=1.0.1->matplotlib>=3.0.3->mptcpanalyzer==0.3.2.dev0) (41.0.1)
Building wheels for collected packages: pandas
  Building wheel for pandas (setup.py) ... done
  Stored in directory: /home/teto/.cache/pip/wheels/47/0a/bf/fd3647f5bc74698ed95dbdbb3d8d120cfe0280969c212cdb6c
Successfully built pandas
Installing collected packages: pandas, mptcpanalyzer
  Found existing installation: pandas 0+unknown
    Uninstalling pandas-0+unknown:
ERROR: Could not install packages due to an EnvironmentError: [Errno 30] Read-only file system: 'METADATA'

The most straightforward solution in my case would be to export the VERSIONEER_VERSION="0.25.0"; to fix the install. Right now, I remove the pandas’ version check from program’s setup.py, which is annoying.

[effigies]

I think there’s a common issue of finding some fallback version, and I’ve tagged the open issues that bring up different aspects of this with the fallback label.

It would be good to try to address this with each of these use cases in mind.

[costrouc]

Since it doesn’t look like this issue has gained much traction here is the workaround I am using with nix. Note that dask/_version.py will need to be changed

  postPatch = ''
    # versioneer hack to set version of github package
    echo "def get_versions(): return {'dirty': False, 'error': None, 'full-revisionid': None, 'version': '${version}'}" > dask/_version.py

    substituteInPlace setup.py \
      --replace "version=versioneer.get_version()," "version='${version}'," \
      --replace "cmdclass=versioneer.get_cmdclass()," ""
  '';