add better string representation for Process objects

Author: mr-c

cwltool/context.py

@@ -127,7 +127,7 @@ def __init__(self, kwargs: Optional[Dict[str, Any]] = None) -> None:
         self.basedir = ""  # type: str
         self.toplevel = False  # type: bool
         self.mutation_manager = None  # type: Optional[MutationManager]
-        self.make_fs_access = StdFsAccess  # type: Callable[[str], StdFsAccess]
+        self.make_fs_access = StdFsAccess
         self.path_mapper = PathMapper
         self.builder = None  # type: Optional[Builder]
         self.docker_outdir = ""  # type: str

cwltool/process.py

@@ -1076,6 +1076,10 @@ def job(
     ) -> JobsGeneratorType:
         pass
 
+    def __str__(self) -> str:
+        """Return the id of this CWL process."""
+        return f"{self.__module__}: {self.tool['id']}"
+
 
 _names = set()  # type: Set[str]