fix(toolchain) Override coverage rc

Author: ewianda

docs/requirements.txt

@@ -118,9 +118,9 @@ colorama==0.4.6 ; sys_platform == 'win32' \
     --hash=sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44 \
     --hash=sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6
     # via sphinx
-docutils==0.20.1 \
-    --hash=sha256:96f387a2c5562db4476f09f13bbab2192e764cac08ebbf3a34a95d9b1e4a59d6 \
-    --hash=sha256:f08a4e276c3a1583a86dce3e34aba3fe04d02bba2dd51ed16106244e8a923e3b
+docutils==0.21.2 \
+    --hash=sha256:3a6b18732edf182daa3cd12775bbb338cf5691468f91eeeb109deff6ebfa986f \
+    --hash=sha256:dafca5b9e384f0e419294eb4d2ff9fa826435bf15f15b7bd45723e8ad76811b2
     # via
     #   myst-parser
     #   sphinx

python/private/stage2_bootstrap_template.py

@@ -350,29 +350,28 @@ def _maybe_collect_coverage(enable):
         rcfile.write(
             """[run]
 relative_files = True
+omit = 
+            # Pipes can't be read back later, which can cause coverage to
+            # throw an error when trying to get its source code.
+           /dev/fd/* 
+            # The mechanism for finding third-party packages in coverage-py
+            # only works for installed packages, not for runfiles. e.g:
+            #'$HOME/.local/lib/python3.10/site-packages',
+            # '/usr/lib/python',
+            # '/usr/lib/python3.10/site-packages',
+            # '/usr/local/lib/python3.10/dist-packages'
+            # see https://github.com/nedbat/coveragepy/blob/bfb0c708fdd8182b2a9f0fc403596693ef65e475/coverage/inorout.py#L153-L164
+           */external/*
 """
         )
     try:
         cov = coverage.Coverage(
-            config_file=rcfile_name,
+            config_file=os.environ.get("COVERAGE_RCFILE", rcfile_name),
             branch=True,
             # NOTE: The messages arg controls what coverage prints to stdout/stderr,
             # which can interfere with the Bazel coverage command. Enabling message
             # output is only useful for debugging coverage support.
             messages=is_verbose_coverage(),
-            omit=[
-                # Pipes can't be read back later, which can cause coverage to
-                # throw an error when trying to get its source code.
-                "/dev/fd/*",
-                # The mechanism for finding third-party packages in coverage-py
-                # only works for installed packages, not for runfiles. e.g:
-                #'$HOME/.local/lib/python3.10/site-packages',
-                # '/usr/lib/python',
-                # '/usr/lib/python3.10/site-packages',
-                # '/usr/local/lib/python3.10/dist-packages'
-                # see https://github.com/nedbat/coveragepy/blob/bfb0c708fdd8182b2a9f0fc403596693ef65e475/coverage/inorout.py#L153-L164
-                "*/external/*",
-            ],
         )
         cov.start()
         try: