fix(ci_visibility): look for CODEOWNERS relative to repo root, not cwd [backport 2.21] (#13128)

Backport fe66a15 from #13112 to 2.21.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

---------

Co-authored-by: Vítor De Araújo <[email protected]>
Co-authored-by: Brett Langdon <[email protected]>

Author: 3 people

ddtrace/internal/ci_visibility/recorder.py

@@ -306,7 +306,7 @@ def __init__(self, tracer=None, config=None, service=None):
         log.info("Detected configurations: %s", str(self._configurations))
 
         try:
-            self._codeowners = Codeowners()
+            self._codeowners = Codeowners(cwd=self._tags.get(ci.WORKSPACE_PATH))
         except ValueError:
             log.warning("CODEOWNERS file is not available")
         except Exception:

releasenotes/notes/ci_visibility-fix-codeowners-repo-root-0f424ef3a049354f.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    CI Visibility: This fix resolves an issue where the ``CODEOWNERS`` file of the project being tested was looked up in
+    the current working directory rather than the repository root.

tests/contrib/pytest/test_pytest.py

@@ -953,6 +953,25 @@ def test_team_b():
         assert json.loads(test_spans[0].get_tag(test.CODEOWNERS)) == ["@default-team"], test_spans[0]
         assert json.loads(test_spans[1].get_tag(test.CODEOWNERS)) == ["@team-b", "@backup-b"], test_spans[1]
 
+    def test_pytest_will_report_codeowners_when_called_from_subdirectory(self):
+        self.testdir.mkdir(".github")
+        self.testdir.makefile("", **{".github/CODEOWNERS": "* @default-team"})
+
+        subdir = self.testdir.mkdir("subdir")
+        test_file_content = """
+        import pytest
+
+        def test_foo():
+            assert 1 == 1
+        """
+        self.testdir.makepyfile(**{"subdir/test_foo": test_file_content})
+
+        subdir.chdir()
+        self.inline_run("--ddtrace", "test_foo.py")
+        spans = self.pop_spans()
+        [test_span] = [span for span in spans if span.get_tag("type") == "test"]
+        assert json.loads(test_span.get_tag(test.CODEOWNERS)) == ["@default-team"]
+
     def test_pytest_session(self):
         """Test that running pytest will generate a test session span."""
         self.inline_run("--ddtrace")