py39-black @21.8b0_0: No matching distribution found for setuptools_scm~=6.0.1

[JD-Veiga]

Hi,

When trying to install (or upgrade) py39-black, it fails:

Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-black/py39-black/work/black-21.8b0" && /opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 setup.py --no-user-cfg build -j4 
WARNING: The index url "''" seems invalid, please provide a scheme.
WARNING: Location '''/setuptools-scm/' is ignored: it is either a non-existing path or lacks a specific scheme.
WARNING: Location '''' is ignored: it is either a non-existing path or lacks a specific scheme.
ERROR: Could not find a version that satisfies the requirement setuptools_scm~=6.0.1 (from versions: none)
ERROR: No matching distribution found for setuptools_scm~=6.0.1
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/installer.py", line 75, in fetch_build_egg
    subprocess.check_call(cmd)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 373, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-black/py39-black/work/.tmp/tmp_i6xcbz0', '--quiet', '--index-url', "''", '--find-links', "''", 'setuptools_scm~=6.0.1']' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-black/py39-black/work/black-21.8b0/setup.py", line 48, in <module>
    setup(
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/__init__.py", line 152, in setup
    _install_setup_requires(attrs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/__init__.py", line 147, in _install_setup_requires
    dist.fetch_build_eggs(dist.setup_requires)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/dist.py", line 785, in fetch_build_eggs
    resolved_dists = pkg_resources.working_set.resolve(
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pkg_resources/__init__.py", line 766, in resolve
    dist = best[req.key] = env.best_match(
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pkg_resources/__init__.py", line 1051, in best_match
    return self.obtain(req, installer)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pkg_resources/__init__.py", line 1063, in obtain
    return installer(requirement)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/dist.py", line 844, in fetch_build_egg
    return fetch_build_egg(self, req)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/setuptools/installer.py", line 77, in fetch_build_egg
    raise DistutilsError(str(e)) from e
distutils.errors.DistutilsError: Command '['/opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-black/py39-black/work/.tmp/tmp_i6xcbz0', '--quiet', '--index-url', "''", '--find-links', "''", 'setuptools_scm~=6.0.1']' returned non-zero exit status 1.
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-black/py39-black/work/black-21.8b0" && /opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 setup.py --no-user-cfg build -j4 
Exit code: 1
Error: Failed to build py39-black: command execution failed

Running on:

macports 2.7.1
py39-setuptools_scm @6.0.1_0 (active)
Python 3.9.7
macOS 10.14.6 (Mojave)

Thank you.

[JD-Veiga]

Hi,

I have updated to last version of setuptools-scm (6.3.1, released just yesterday) and py39-black has been upgraded without any inconvenience. So I suppose that it was a bug in setuptools-scm.