feat: new COVERAGEPY_IGNORE_ERRORS env var

Author: BurnzZ

CHANGELOG.md

@@ -78,7 +78,8 @@ Unreleased changes template.
 
 {#v0-0-0-added}
 ### Added
-* Nothing added.
+* (coverage) New COVERAGEPY_IGNORE_ERRORS environment var that adds the `--ignore-errors`
+  flag to coverage.py when producing the lcov output file.
 
 {#v0-0-0-removed}
 ### Removed

python/private/python_bootstrap_template.txt

@@ -461,6 +461,11 @@ relative_files = True
     kparams['stdout'] = sys.stderr
     kparams['stderr'] = sys.stderr
 
+  # Workaround for coveragepy having weird errors.
+  # See: https://github.com/bazelbuild/rules_python/issues/2575
+  if os.getenv("COVERAGEPY_IGNORE_ERRORS"):
+    params.append("--ignore-errors")
+
   ret_code = subprocess.call(
     params,
     **kparams