Pass user command text to the Command object

Previously the Command objects did not know what command text was entered
by the user.  That mapping is done in entry points and was thrown away in
App.run_subcommand().

This adds cmd_name as an optional keyword arg to Command.__init__() and
saves it as an attribute.  App.run_subcommand() passes in the original
command text to cmd_factory() and all is well.

Closes-bug: #1411095
Change-Id: I36c42b0447652ed3bd71ad6ae0d70db7d27abbad

cliff/app.py

@@ -3,6 +3,7 @@
 
 import argparse
 import codecs
+import inspect
 import locale
 import logging
 import logging.handlers
@@ -281,7 +282,10 @@ class App(object):
                 self.LOG.error(err)
             return 2
         cmd_factory, cmd_name, sub_argv = subcommand
-        cmd = cmd_factory(self, self.options)
+        kwargs = {}
+        if 'cmd_name' in inspect.getargspec(cmd_factory.__init__).args:
+            kwargs['cmd_name'] = cmd_name
+        cmd = cmd_factory(self, self.options, **kwargs)
         err = None
         result = 1
         try:

cliff/command.py

@@ -16,9 +16,10 @@ class Command(object):
 
     deprecated = False
 
-    def __init__(self, app, app_args):
+    def __init__(self, app, app_args, cmd_name=None):
         self.app = app
         self.app_args = app_args
+        self.cmd_name = cmd_name
         return
 
     def get_description(self):

cliff/display.py

@@ -27,8 +27,9 @@ class DisplayCommandBase(Command):
     """Command base class for displaying data about a single object.
     """
 
-    def __init__(self, app, app_args):
-        super(DisplayCommandBase, self).__init__(app, app_args)
+    def __init__(self, app, app_args, cmd_name=None):
+        super(DisplayCommandBase, self).__init__(app, app_args,
+                                                 cmd_name=cmd_name)
         self._formatter_plugins = self._load_formatter_plugins()
 
     @abc.abstractproperty

cliff/tests/test_command.py

@@ -20,3 +20,8 @@ def test_get_parser():
     cmd = TestCommand(None, None)
     parser = cmd.get_parser('NAME')
     assert parser.prog == 'NAME'
+
+
+def test_get_name():
+    cmd = TestCommand(None, None, cmd_name='object action')
+    assert cmd.cmd_name == 'object action'