Coverage 6.0 moved coverage.misc.NoSource to coverage.exceptions.NoSource

[haakenlid]

Looks like the latest stable version of coverage breaks the reporting from coveralls-python.

#!/bin/bash -eo pipefail
COVERALLS_REPO_TOKEN=Q58WdUuZOi89XHyDeDsGE2lxUGQ2IfqP3 coveralls
Traceback (most recent call last):
  File "/home/circleci/.local/bin/coveralls", line 5, in <module>
    from coveralls.cli import main
  File "/home/circleci/.local/lib/python3.8/site-packages/coveralls/__init__.py", line 1, in <module>
    from .api import Coveralls
  File "/home/circleci/.local/lib/python3.8/site-packages/coveralls/api.py", line 14, in <module>
    from .reporter import CoverallReporter
  File "/home/circleci/.local/lib/python3.8/site-packages/coveralls/reporter.py", line 5, in <module>
    from coverage.misc import NoSource
ImportError: cannot import name 'NoSource' from 'coverage.misc' (/home/circleci/.local/lib/python3.8/site-packages/coverage/misc.py)

Exited with code exit status 1
CircleCI received exit code 1

nedbat/coveragepy@6a3d3aa#diff-8489ba0fa1175208cbaa2e586bbf94c70fe721b8ebd8f022452e431fefd64168

[nedbat]

I took a look at reporter.py here: there are many internal elements being accessed. It would be better to work out a public API that does what you need.

[haakenlid]

Thanks for looking into it.

I did figure out a solution for my problem. Turns out the circleCI configuration of the github repo I was submitting a pull request to would install the latest stable version of both coveralls and coverage python packages.

steps:
  - checkout
  - run:
      command: pip install --user tox coverage coveralls
      name: "Install Tox & Coverage"

I changed this to let coveralls choose which version of coverage to use (not yet 6.0), and then it built with no error.

      command: pip install --user tox coveralls

I suspect that there are more projects out there with similar configuration (copy-pasted?) that will be affected by this change.

A quick search seems to confirm that suspicion.
https://github.com/search?l=YAML&q=%22tox+coverage+coveralls%22&type=Code

[nedbat]

BTW, coverage.py 6.0.1 restored access to the exceptions from coverage.misc. Can you try to allow newer versions of coverage.py?