Setup TARGET_GIT_REF

.github/workflows/selfdrive_tests.yaml

@@ -152,6 +152,8 @@ jobs:
                         ./selfdrive/ui/tests/create_test_translations.sh && \
                         QT_QPA_PLATFORM=offscreen ./selfdrive/ui/tests/test_translations && \
                         chmod -R 777 /tmp/comma_download_cache"
+      env:
+        TARGET_GIT_REF: ${{ github.event_name == 'pull_request' && github.base_ref || github.event.before }}
     - name: "Upload coverage to Codecov"
       uses: codecov/codecov-action@v4
       with:

selfdrive/test/process_replay/test_log_compat.py

@@ -11,7 +11,7 @@ from openpilot.tools.lib.logreader import LogReader
 from openpilot.common.run import run_cmd
 
 MAX_EXAMPLES = int(os.environ.get("MAX_EXAMPLES", "2"))
-TARGET_REF = os.environ.get("TARGET_REF", "")
+TARGET_GIT_REF = os.environ.get("TARGET_GIT_REF", "origin/master")
 
 
 @pytest.fixture(scope="module")
@@ -19,7 +19,7 @@ def parent_schema_file(tmp_path_factory):
   tmp_dir = tmp_path_factory.mktemp("cereal")
 
   # TODO this will fail if the any capnp files are added/removed vs what was on the parent commit
-  commit = run_cmd(["git", "rev-parse", TARGET_REF]) if TARGET_REF else run_cmd(["git", "merge-base", "origin/master", "HEAD"])
+  commit = run_cmd(["git", "rev-parse", TARGET_GIT_REF])
   opendbc_commit = run_cmd(["git", "ls-tree", "--object-only", commit, "opendbc_repo"]) # for car.capnp
   for capnp_fp in glob(os.path.join(CEREAL_PATH, "**", "*.capnp"), recursive=True):
     fname = os.path.relpath(capnp_fp, CEREAL_PATH)