`pytest-cov` sets `--source` option automatically even if there is only an `include` section in `.coveragerc`

[gro1m]

Summary

Original issue has been opened at coveragepy: https://github.com/nedbat/coveragepy/issues/1355. I get CoverageWarning: --include is ignored because --source is set (include-ignored) self.warn("--include is ignored because --source is set", slug="include-ignored") although only include is specified in .coveragerc and nowhere --source is specified.

As @nedbat correctly commented, it seems that pytest-cov seems to automatically set the --source option. Removal of pytest-cov resolved the problem.

Expected vs actual result

Expected: No CoverageWarning: --include is ignored because --source is set (include-ignored) self.warn("--include is ignored because --source is set", slug="include-ignored") and not setting --source when source is nowhere specified.

Reproducer

Minimal example is here: https://github.com/gro1m/coverageminimalexample

NOTE: I substituted my HOME PATH with ~ on line 6 in the generated coverage.xml, this is an alteration I did after the program has been run.

Commands run: pytest

Versions

Python: 3.9.7, 3.10.4 respectively coveragepy: 6.3.2 pytest: 7.1.1 pytest-cov: 3.0.0

Config

.coveragerc

[run]
include =
  pycobertura/*

pytest.ini: https://github.com/aconrad/pycobertura/blob/master/pytest.ini

tox.ini: https://github.com/aconrad/pycobertura/blob/e8150644ee644ec95519d1dc8c99878e67a38e68/tox.ini

setup.cfg: https://github.com/aconrad/pycobertura/blob/master/setup.cfg

Code

• Minimal example: https://github.com/gro1m/coverageminimalexample
• Actual use case: https://github.com/aconrad/pycobertura/tree/e8150644ee644ec95519d1dc8c99878e67a38e68 (the current master branch contains a workaround based on the following PR that does not use pytest-cov anymore: https://github.com/aconrad/pycobertura/pull/140)