Use __str__ as consistent way to get access to CLI command level documentation

Author: timothycrosley

hug/api.py

@@ -471,7 +471,7 @@ def output_format(self, formatter):
     def __str__(self):
         output = "{0}\n\nAvailable Commands:\n\n".format(self.api.doc or self.api.name)
         for command_name, command in self.commands.items():
-            command_string = " - {}{}".format(command_name, ": " + command.parser.description.replace("\n", " ") if command.parser.description else "")
+            command_string = " - {}{}".format(command_name, ": " + str(command).replace("\n", " ") if str(command) else "")
             output += (command_string[:77] + "..." if len(command_string) > 80 else command_string)
             output += "\n"
         return output

hug/interface.py

@@ -565,6 +565,9 @@ def output(self, data, context):
                     sys.stdout.buffer.write(b"\n")
         return data
 
+    def __str__(self):
+        return self.parser.description or ""
+
     def __call__(self):
         """Calls the wrapped function through the lens of a CLI ran command"""
         context = self.api.context_factory(api=self.api, argparse=self.parser, interface=self)