convert folder to a module

runhouse/constants.py

@@ -3,7 +3,7 @@
 from pathlib import Path
 from typing import List
 
-RESERVED_SYSTEM_NAMES: List[str] = ["file", "s3", "gs", "azure", "here", "ssh", "sftp"]
+RESERVED_SYSTEM_NAMES: List[str] = ["file", "s3", "gs", "azure", "here"]
 CLUSTER_CONFIG_PATH: str = "~/.rh/cluster_config.json"
 CONFIG_YAML_PATH: str = "~/.rh/config.yaml"
 SERVER_LOGFILE_PATH = "~/.rh/server.log"

runhouse/resources/blobs/file.py

@@ -178,7 +178,7 @@ def exists_in_system(self):
             >>> file = rh.file(data, path="saved/path")
             >>> file.exists_in_system()
         """
-        return self._folder.exists_in_system(self.fsspec_url)
+        return self._folder.exists_in_system()
 
 
 def file(

runhouse/resources/envs/env.py

@@ -9,7 +9,6 @@
 
 from runhouse.logger import logger
 from runhouse.resources.envs.utils import _process_env_vars, run_setup_command
-from runhouse.resources.folders import Folder
 from runhouse.resources.hardware import _get_cluster_from, Cluster
 from runhouse.resources.packages import Package
 from runhouse.resources.resource import Resource
@@ -107,6 +106,8 @@ def reqs(self, reqs):
 
     def _reqs_to(self, system: Union[str, Cluster], path=None, mount=False):
         """Send self.reqs to the system (cluster or file system)"""
+        from runhouse.resources.folders import Folder
+
         new_reqs = []
         for req in self.reqs:
             if isinstance(req, str):