Convert --session-extras to an append-type option

docs/manpage.rst

@@ -1141,6 +1141,8 @@ Miscellaneous options
    The key/value data is specified as a comma-separated list of `key=value` pairs.
    When listing stored sessions with the :option:`--list-stored-sessions` option, any associated custom metadata will be presented.
 
+   This option can be specified multiple times, in which case the data from all options will be combined in a single list of key/value data.
+
    .. versionadded:: 4.7
 
 .. option:: --session-filter EXPR

reframe/frontend/cli.py

@@ -617,7 +617,7 @@ def main():
               '(default: "now:now/last:+job_nodelist/+result")')
     )
     reporting_options.add_argument(
-        '--session-extras', action='store', metavar='KV_DATA',
+        '--session-extras', action='append', metavar='KV_DATA',
         help='Annotate session with custom key/value data'
     )
     reporting_options.add_argument(
@@ -1601,9 +1601,10 @@ def module_unuse(*paths):
             if options.session_extras:
                 # Update report's extras
                 extras = {}
-                for arg in options.session_extras.split(','):
-                    k, v = arg.split('=', maxsplit=1)
-                    extras[k] = v
+                for sess in options.session_extras:
+                    for arg in sess.split(','):
+                        k, v = arg.split('=', maxsplit=1)
+                        extras[k] = v
 
                 report.update_extras(extras)
 

unittests/test_cli.py

@@ -1327,6 +1327,7 @@ def test_session_annotations(run_reframe):
         checkpath=['unittests/resources/checks/frontend_checks.py'],
         action='-r',
         more_options=['--session-extras', 'key1=val1,key2=val2',
+                      '--session-extras', 'key3=val3',
                       '-n', '^PerformanceFailureCheck']
     ), exitcode=1)