This is an example for how this proposed fix can address the issue of omitted files in the report if they have no tests: bazel-contrib/rules_python#2607

Setup

git clone https://github.com/burnzz/rules_python
cd rules_python
git checkout coveragepy-source
git clone https://github.com/BurnzZ/bazel-python-omitted-coverage examples/
cd examples/bazel-python-omitted-coverage

Note that this repo already has this line in MODULE.bazel, which utilizes the fix in the coveragepy-source branch of rules_python.

local_path_override(
    module_name = "rules_python",
    path = "../..",
)

We can then confirm the fix via:

bazel coverage --combined_report=lcov :test --nocache_test_results --test_output=all
lcov --list "$(bazel info output_path)/_coverage/_coverage_report.dat"

The output should then show that no_tests.py is included in the report with 0 coverage 🎉 :

                  |Lines       |Functions
Filename          |Rate     Num|Rate    Num
===========================================
[src/]
has_tests.py      | 100%      3|    -     0
no_tests.py       | 0.0%      2|    -     0
===========================================
            Total:|60.0%      5|    -     0
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