fix(warnings): use GITHUB_WORKSPACE instead of GITHUB_WORKFLOW (#124)

similar to the errors case, use `GITHUB_WORKSPACE` to determine the
workspace. `GITHUB_WORKFLOW` is different, it is the name of the
workflow, which is usually not a filename, unless the workflow is
unnamed.

Author: rmuir

plugin_test.py

@@ -132,6 +132,30 @@ def test_warning():
     assert not result.stderr.lines
 
 
+def test_annotation_warning_cwd(testdir: pytest.Testdir):
+    testdir.makepyfile(
+        """
+        import warnings
+        import pytest
+        pytest_plugins = 'pytest_github_actions_annotate_failures'
+
+        def test_warning():
+            warnings.warn('beware', Warning)
+            assert 1
+        """
+    )
+    testdir.monkeypatch.setenv("GITHUB_ACTIONS", "true")
+    testdir.monkeypatch.setenv("GITHUB_WORKSPACE", os.path.dirname(str(testdir.tmpdir)))
+    testdir.mkdir("foo")
+    testdir.makefile(".ini", pytest="[pytest]\ntestpaths=..")
+    result = testdir.runpytest_subprocess("--rootdir=foo")
+    result.stderr.fnmatch_lines(
+        [
+            "::warning file=test_annotation_warning_cwd0/test_annotation_warning_cwd.py,line=6::beware",
+        ]
+    )
+
+
 def test_annotation_third_party_exception(testdir: pytest.Testdir):
     testdir.makepyfile(
         my_module="""

pytest_github_actions_annotate_failures/plugin.py

@@ -113,7 +113,7 @@ def pytest_warning_recorded(
             return
 
         filesystempath = warning_message.filename
-        workspace = os.environ.get("GITHUB_WORKFLOW")
+        workspace = os.environ.get("GITHUB_WORKSPACE")
 
         if workspace:
             try: