Fixed wrong file creation in process.py

If the output is a File in a subdirectory of the output folder, the
local dummy file creation fails with a NotFound error. It is
therefore necessary to recreate the whole directory hierarchy
before touching the file.

streamflow/cwl/process.py

@@ -1,6 +1,7 @@
 import os
 import urllib.parse
 from datetime import datetime
+from pathlib import Path
 from typing import Type, Any, MutableMapping, Mapping, Callable, Generator, Union, Optional, Dict, Text, List
 
 from cwltool.command_line_tool import CommandLineTool, CallbackJob
@@ -167,6 +168,8 @@ def receive_output(self,
                             if element.get('class') == 'Directory':
                                 os.makedirs(abs_path, exist_ok=True)
                             else:
+                                parent_dir = str(Path(abs_path).parent)
+                                os.makedirs(parent_dir, exist_ok=True)
                                 open(abs_path, 'a').close()
         super().receive_output(output_callback, jobout, processStatus)
         if job_context is not None:

streamflow/version.py

@@ -1 +1 @@
-VERSION = "0.0.20"
+VERSION = "0.0.21"