Properly report code on coverage on linux from a windows coverage database

Signed-off-by: Pedro Algarvio <palgarvio@vmware.com>

.coveragerc

@@ -32,20 +32,12 @@ ignore_errors = True
 [paths]
 salt =
   salt/
-  /tmp/testing/salt/
-  /tmp/kitchen/testing/salt/
-  /private/tmp/kitchen/testing/salt/
-  C:\Windows\Temp\testing\salt
-  C:\Users\admini~1\AppData\Local\Temp\kitchen\testing\salt\
-  C:\Users\Administrator\AppData\Local\Temp\kitchen\testing\salt\
+  **/testing/salt/
+  **\testing\salt
 tests =
   tests/
-  /tmp/testing/tests/
-  /tmp/kitchen/testing/tests/
-  /private/tmp/kitchen/testing/tests/
-  C:\Windows\Temp\testing\tests
-  C:\Users\admini~1\AppData\Local\Temp\kitchen\testing\tests\
-  C:\Users\Administrator\AppData\Local\Temp\kitchen\testing\tests\
+  **/testing/tests/
+  **\testing\tests
 extension_modules =
   tests/integration/files/extension_modules/
   */extension_modules/

noxfile.py

@@ -6,11 +6,11 @@ Nox configuration script
 """
 # pylint: disable=resource-leakage,3rd-party-module-not-gated
 
-
 import datetime
 import json
 import os
 import pathlib
+import sqlite3
 import sys
 import tempfile
 
@@ -456,6 +456,18 @@ def _report_coverage(session):
         # exception
         pass
 
+    if not IS_WINDOWS:
+        # The coverage file might have come from a windows machine, fix paths
+        with sqlite3.connect(COVERAGE_FILE) as db:
+            res = db.execute(r"SELECT * FROM file WHERE path LIKE '%salt\%'")
+            if res.fetchone():
+                session_warn(
+                    session,
+                    "Replacing backwards slashes with forward slashes on file "
+                    "paths in the coverage database",
+                )
+                db.execute(r"UPDATE OR IGNORE file SET path=replace(path, '\', '/');")
+
     if report_section == "salt":
         json_coverage_file = (
             COVERAGE_OUTPUT_DIR.relative_to(REPO_ROOT) / "coverage-salt.json"