start workers with the same database path

otherwise temp databases could not be reached by workers
²

capsul/database/__init__.py

@@ -108,7 +108,10 @@ def __exit__(self, exception_type, exception_value, exception_traceback):
             self._exit()
 
     def workers_command(self, engine_id):
-        db_config = self.worker_database_config(self.engine_id)
+        db_config = dict(self.worker_database_config(self.engine_id))
+        # fix db path in case it is different from the initial config
+        # (happens if path == '')
+        db_config['path'] = self.path
         db_config = json.dumps(db_config, separators=(',', ':'))
         workers_command = []
         config = self.engine_config(engine_id)

capsul/database/redis.py

@@ -54,6 +54,7 @@ def _enter(self):
                     if self.path == '':
                         self._path = os.path.join(tmp, 'database.rdb')
                         self.redis_socket = f'{self.path}.socket'
+                    print('start redis:', self._path, self.redis_socket)
                     dir, dbfilename = os.path.split(self.path)
                     pid_file = f'{tmp}/redis.pid'
                     log_file = f'{tmp}/redis.log'
@@ -94,7 +95,8 @@ def _enter(self):
                 f'Invalid Redis connection type: {self.config["type"]}')
         if self.redis.get('capsul:shutting_down'):
             raise RuntimeError(
-                'Cannot connect to database because it is shutting down')
+                'Cannot connect to database because it is shutting down: '
+                f'{self._path}: {self.redis_socket}')
         self.redis.hset('capsul:connections', self.uuid,
                         datetime.now().isoformat())