Add append_timestamp option for trace action

tracetools_trace/tracetools_trace/tools/args.py

@@ -42,7 +42,7 @@ def parse_args():
 def add_arguments(parser):
     parser.add_argument(
         '--session-name', '-s', dest='session_name',
-        default=f'session-{time.strftime("%Y%m%d%H%M%S")}',
+        default=path.append_timestamp('session'),
         help='the name of the tracing session (default: session-YYYYMMDDHHMMSS)')
     parser.add_argument(
         '--path', '-p', dest='path',

tracetools_trace/tracetools_trace/tools/path.py

@@ -13,11 +13,24 @@
 # limitations under the License.
 
 import os
+import time
 
 
 DEFAULT_BASE_PATH = '~/.ros/tracing/'
 
 
+def append_timestamp(
+    session_name_base: str,
+) -> str:
+    """
+    Append timestamp to base session name.
+
+    :param session_name_base: the base name of the tracing session
+    :return: the session name with timestamp
+    """
+    return session_name_base + '-' + time.strftime("%Y%m%d%H%M%S")
+
+
 def get_full_session_path(
     session_name: str,
     base_path: str = DEFAULT_BASE_PATH