Add CI helper class

This class provides a generic "context" for individual tasks about the
current task step, and where to log results. It's used by
archiveArtifact() that would automatically log files in the right
directory, based on a directory in the context, and in a way that order
of files is preserved for long-running pipelines.

ci-scripts/cls_ci_helper.py

+#/*
+# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+# * contributor license agreements.  See the NOTICE file distributed with
+# * this work for additional information regarding copyright ownership.
+# * The OpenAirInterface Software Alliance licenses this file to You under
+# * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+# * except in compliance with the License.
+# * You may obtain a copy of the License at
+# *
+# *      http://www.openairinterface.org/?page_id=698
+# *
+# * Unless required by applicable law or agreed to in writing, software
+# * distributed under the License is distributed on an "AS IS" BASIS,
+# * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# * See the License for the specific language governing permissions and
+# * limitations under the License.
+# *-------------------------------------------------------------------------------
+# * For more information about the OpenAirInterface (OAI) Software Alliance:
+# *      contact@openairinterface.org
+# */
+
+import os
+from typing import NamedTuple
+import logging
+
+class TestCaseCtx(NamedTuple):
+    count: int
+    test_id: int
+    logPath: str
+
+    def Default(logPath):
+        return TestCaseCtx(123, 112233, logPath)
+    def baseFilename(self):
+        # typically, the test ID is of form 001234 (6 digits)
+        return f"{self.logPath}/{self.count}-{self.test_id:06d}"
+
+def archiveArtifact(cmd, ctx, remote_path):
+    base = os.path.basename(remote_path)
+    local = f"{ctx.baseFilename()}-{base}"
+    logging.info(f"Archive artifact '{local}'")
+    success = cmd.copyin(remote_path, local)
+    if success:
+        cmd.run(f'rm {remote_path}', silent=True)
+    return local if success else None