Allow binding to an alias.

Fix #1813: Cannot :bind to alias

qutebrowser/config/parsers/keyconf.py

@@ -25,7 +25,7 @@ import itertools
 
 from PyQt5.QtCore import pyqtSignal, QObject
 
-from qutebrowser.config import configdata, textwrapper
+from qutebrowser.config import configdata, textwrapper, config
 from qutebrowser.commands import cmdutils, cmdexc
 from qutebrowser.utils import log, utils, qtutils, message, usertypes
 
@@ -352,7 +352,8 @@ class KeyConfigParser(QObject):
                     line))
         commands = [c.split(maxsplit=1)[0].strip() for c in commands]
         for cmd in commands:
-            if cmd not in cmdutils.cmd_dict:
+            aliases = config.section('aliases')
+            if cmd not in cmdutils.cmd_dict and cmd not in aliases:
                 raise KeyConfigError("Invalid command '{}'!".format(cmd))
 
     def _read_command(self, line):

tests/end2end/features/keyinput.feature

@@ -61,6 +61,18 @@ Feature: Keyboard input
         And I run :bind <ctrl-test23>
         Then the message "<ctrl-test23> is bound to 'message-info bar' in normal mode" should be shown
 
+    Scenario: Binding to an alias
+        When I run :set aliases 'mib' 'message-info baz'
+        And I run :bind test25 mib
+        And I press the keys "test25"
+        Then the message "baz" should be shown
+
+    Scenario: Printing a bound alias
+        When I run :set aliases 'mib' 'message-info baz'
+        And I run :bind <test26> mib
+        And I run :bind <test26>
+        Then the message "<test26> is bound to 'mib' in normal mode" should be shown
+
     # :unbind
 
     Scenario: Binding and unbinding a keychain