Summary

setuptools_scm 1.13.1 fails for several of my projects. 1.10.1 and 1.11.1 worked fine. The ultimate error is (full traceback below):

  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/version.py", line 86, in meta
    assert tag is not None, 'cant parse version %s' % tag
AssertionError: cant parse version None

Python 3.5.2, Ubuntu 16.04, various versions of setuptools_scm (see below).

This error appears to occur only for head revisions on several repos. Affected repos use hg-git, although I have no evidence that that’s related.

Reproduction

snafu$ hg clone git@github.com:biocommons/bioutils.git
destination directory: bioutils
importing git objects into hg
updating to branch default
41 files updated, 0 files merged, 0 files removed, 0 files unresolved

snafu$ cd bioutils/

snafu$ pyvenv venv

snafu$ source venv/bin/activate

(venv) snafu$ pip install --upgrade pip setuptools
Collecting pip
  Using cached pip-9.0.1-py2.py3-none-any.whl
Collecting setuptools
  Using cached setuptools-28.8.0-py2.py3-none-any.whl
Installing collected packages: pip, setuptools
  Found existing installation: pip 8.1.1
    Uninstalling pip-8.1.1:
      Successfully uninstalled pip-8.1.1
  Found existing installation: setuptools 20.7.0
    Uninstalling setuptools-20.7.0:
      Successfully uninstalled setuptools-20.7.0
Successfully installed pip-9.0.1 setuptools-28.8.0

# recent commits, with any tags
(venv) snafu$ hg log -l 7 -G -T '{rev} {node|short} {tags}'
@  59 4aac87427260 default/default/master default/master tip
|
o  58 f9ca4a4c9c1c 0.2.0a2
|
o  57 f7d97e9493ae
|
o  56 57709bd798a4
|
o  55 019f38efb5c2
|
o  54 12c36903cb55 0.2.0a1
|
o  53 6bf205dc9ec0

# generate a table of get_version results for the above commits and setuptools_scm 1.10.1, 1.11.1, 1.13.1
(venv) snafu$ for r in 4aac f9ca f7d9 5770 019f 12c3 6bf2; do hg up -q $r; echo -n $(hg id -it); for v in 1.10.1 1.11.1 1.13.1; do pip install setuptools_scm==$v 1>/dev/null 2>&1; echo -n ,$(python -c 'from setuptools_scm import get_version; print(get_version())' 2>/dev/null | tail -1); done; echo; done >|data

(venv) snafu$ column -ts, <data
4aac87427260 default/default/master default/master tip  0.2.0a2                     0.2.0a2
f9ca4a4c9c1c 0.2.0a2                                    0.2.0a2                     0.2.0a2                     0.2.0a2
f7d97e9493ae                                            0.2.0a2.dev3+nf7d97e9493ae  0.2.0a2.dev3+nf7d97e9493ae  0.2.0a2.dev3+nf7d97e9493ae
57709bd798a4                                            0.2.0a2.dev2+n57709bd798a4  0.2.0a2.dev2+n57709bd798a4  0.2.0a2.dev2+n57709bd798a4
019f38efb5c2                                            0.2.0a1                     0.2.0a1                     0.2.0a1
12c36903cb55 0.2.0a1                                    0.2.0a1                     0.2.0a1                     0.2.0a1
6bf205dc9ec0                                            0.1.4.dev4+n6bf205dc9ec0    0.1.4.dev4+n6bf205dc9ec0    0.1.4.dev4+n6bf205dc9ec0

Columns are 1) changeset + tags, 2) 1.10.1 get_version, 3) 1.11.1 get_version, 4) 1.13.1 get_version

Example Tracebacks

These are all collected for the same bioutils commit (changeset 4aac87427260).

1.13.1

(venv) snafu$ pip install setuptools_scm==1.13.1; python -c 'from setuptools_scm import get_version; print(get_version())'
Collecting setuptools_scm==1.13.1
  Using cached setuptools_scm-1.13.1-py2.py3-none-any.whl
Installing collected packages: setuptools-scm
Successfully installed setuptools-scm-1.13.1
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/__init__.py", line 117, in get_version
    parsed_version = _do_parse(root, parse)
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/__init__.py", line 82, in _do_parse
    version = version_from_scm(root)
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/__init__.py", line 31, in version_from_scm
    return _version_from_entrypoint(root, 'setuptools_scm.parse_scm')
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/__init__.py", line 37, in _version_from_entrypoint
    return ep.load()(root)
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/hg.py", line 43, in parse
    return _hg_tagdist_normalize_tagcommit(root, tag, dist, node)
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/hg.py", line 17, in _hg_tagdist_normalize_tagcommit
    return meta(tag, distance=dist, node=node, dirty=dirty)
  File "/home/reece/projects/biocommons/bioutils/venv/lib/python3.5/site-packages/setuptools_scm/version.py", line 86, in meta
    assert tag is not None, 'cant parse version %s' % tag
AssertionError: cant parse version None

1.11.1

(venv) snafu$ pip install setuptools_scm==1.11.1; python -c 'from setuptools_scm import get_version; print(get_version())'
Collecting setuptools_scm==1.11.1
  Using cached setuptools_scm-1.11.1-py2.py3-none-any.whl
Installing collected packages: setuptools-scm
  Found existing installation: setuptools-scm 1.13.1
    Uninstalling setuptools-scm-1.13.1:
      Successfully uninstalled setuptools-scm-1.13.1
Successfully installed setuptools-scm-1.11.1
0.2.0a3.dev2+n932c0cfb2774

1.10.1

(venv) snafu$ pip install setuptools_scm==1.10.1; python -c 'from setuptools_scm import get_version; print(get_version())'
Collecting setuptools_scm==1.10.1
  Using cached setuptools_scm-1.10.1-py2.py3-none-any.whl
Installing collected packages: setuptools-scm
  Found existing installation: setuptools-scm 1.11.1
    Uninstalling setuptools-scm-1.11.1:
      Successfully uninstalled setuptools-scm-1.11.1
Successfully installed setuptools-scm-1.10.1
0.2.0a3.dev2+n932c0cfb2774