Adds commit hash and date to baseline files

CIME/baselines/performance.py

@@ -4,7 +4,7 @@
 import gzip
 import logging
 from CIME.config import Config
-from CIME.utils import expect
+from CIME.utils import expect, get_src_root, get_current_commit, get_timestamp
 
 logger = logging.getLogger(__name__)
 
@@ -238,7 +238,12 @@ def write_baseline_file(baseline_file, value):
     value : str
         Value to write.
     """
+    commit_hash = get_current_commit(repo=get_src_root())
+
+    timestamp = get_timestamp(timestamp_format="%Y-%m-%d_%H:%M:%S")
+
     with open(baseline_file, "w") as fd:
+        fd.write(f"# sha:{commit_hash} date: {timestamp}\n")
         fd.write(value)
 
 

CIME/tests/test_unit_system_tests.py

@@ -3,6 +3,7 @@
 import os
 import tempfile
 import gzip
+import re
 from re import A
 import unittest
 from unittest import mock
@@ -508,14 +509,16 @@ def test_generate_baseline(self):
             with open(baseline_dir / "cpl-tput.log") as fd:
                 lines = fd.readlines()
 
-            assert len(lines) == 1
-            assert lines[0] == "719.635"
+            assert len(lines) == 2
+            assert re.match("# sha:.* date:.*", lines[0])
+            assert lines[1] == "719.635"
 
             with open(baseline_dir / "cpl-mem.log") as fd:
                 lines = fd.readlines()
 
-            assert len(lines) == 1
-            assert lines[0] == "1673.89"
+            assert len(lines) == 2
+            assert re.match("# sha:.* date:.*", lines[0])
+            assert lines[1] == "1673.89"
 
     def test_kwargs(self):
         case = mock.MagicMock()