Fix image delete multiple arguments error

Fix image delete command, support processing multiple arguments
delete error.
Fix doc/source/command-errors.rst, make the msg format correct.

Change-Id: Icbe347fe077bc148bf71ea8f7399b0e934b7cdf9
Partially-Implements: blueprint multi-argument-image

doc/source/command-errors.rst

@@ -197,9 +197,6 @@ multiple ``delete_network()`` calls.
 
             if ret > 0:
                 total = len(parsed_args.network)
-                msg = _("Failed to delete %(ret)s of %(total)s networks.") %
+                msg = (_("Failed to delete %(ret)s of %(total)s networks.")
-                    {
+                       % {"ret": ret, "total": total})
-                        "ret": ret,
-                        "total": total,
-                    }
                 raise exceptions.CommandError(msg)

openstackclient/image/v2/image.py

@@ -372,13 +372,27 @@ class DeleteImage(command.Command):
         return parser
 
     def take_action(self, parsed_args):
+
+        del_result = 0
         image_client = self.app.client_manager.image
         for image in parsed_args.images:
-            image_obj = utils.find_resource(
+            try:
-                image_client.images,
+                image_obj = utils.find_resource(
-                image,
+                    image_client.images,
-            )
+                    image,
-            image_client.images.delete(image_obj.id)
+                )
+                image_client.images.delete(image_obj.id)
+            except Exception as e:
+                del_result += 1
+                self.app.log.error(_("Failed to delete image with "
+                                   "name or ID '%(image)s': %(e)s")
+                                   % {'image': image, 'e': e})
+
+        total = len(parsed_args.images)
+        if (del_result > 0):
+            msg = (_("Failed to delete %(dresult)s of %(total)s images.")
+                   % {'dresult': del_result, 'total': total})
+            raise exceptions.CommandError(msg)
 
 
 class ListImage(command.Lister):

openstackclient/tests/image/v2/test_image.py

@@ -473,6 +473,37 @@ class TestImageDelete(TestImage):
         self.images_mock.delete.assert_has_calls(calls)
         self.assertIsNone(result)
 
+    def test_image_delete_multi_images_exception(self):
+
+        images = image_fakes.FakeImage.create_images(count=2)
+        arglist = [
+            images[0].id,
+            images[1].id,
+            'x-y-x',
+        ]
+        verifylist = [
+            ('images', arglist)
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        # Fake exception in utils.find_resource()
+        # In image v2, we use utils.find_resource() to find a network.
+        # It calls get() several times, but find() only one time. So we
+        # choose to fake get() always raise exception, then pass through.
+        # And fake find() to find the real network or not.
+        ret_find = [
+            images[0],
+            images[1],
+            exceptions.NotFound('404'),
+        ]
+
+        self.images_mock.get = Exception()
+        self.images_mock.find.side_effect = ret_find
+        self.assertRaises(exceptions.CommandError, self.cmd.take_action,
+                          parsed_args)
+        calls = [mock.call(i.id) for i in images]
+        self.images_mock.delete.assert_has_calls(calls)
+
 
 class TestImageList(TestImage):