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diff --git a/third_party/python/yamllint/yamllint/rules/colons.py b/third_party/python/yamllint/yamllint/rules/colons.py
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+++ b/third_party/python/yamllint/yamllint/rules/colons.py
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+# -*- coding: utf-8 -*-
+# Copyright (C) 2016 Adrien Vergé
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Use this rule to control the number of spaces before and after colons (``:``).
+
+.. rubric:: Options
+
+* ``max-spaces-before`` defines the maximal number of spaces allowed before
+  colons (use ``-1`` to disable).
+* ``max-spaces-after`` defines the maximal number of spaces allowed after
+  colons (use ``-1`` to disable).
+
+.. rubric:: Examples
+
+#. With ``colons: {max-spaces-before: 0, max-spaces-after: 1}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    object:
+      - a
+      - b
+    key: value
+
+#. With ``colons: {max-spaces-before: 1}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    object :
+      - a
+      - b
+
+   the following code snippet would **FAIL**:
+   ::
+
+    object  :
+      - a
+      - b
+
+#. With ``colons: {max-spaces-after: 2}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    first:  1
+    second: 2
+    third:  3
+
+   the following code snippet would **FAIL**:
+   ::
+
+    first: 1
+    2nd:   2
+    third: 3
+"""
+
+
+import yaml
+
+from yamllint.rules.common import is_explicit_key, spaces_after, spaces_before
+
+
+ID = 'colons'
+TYPE = 'token'
+CONF = {'max-spaces-before': int,
+        'max-spaces-after': int}
+DEFAULT = {'max-spaces-before': 0,
+           'max-spaces-after': 1}
+
+
+def check(conf, token, prev, next, nextnext, context):
+    if isinstance(token, yaml.ValueToken):
+        problem = spaces_before(token, prev, next,
+                                max=conf['max-spaces-before'],
+                                max_desc='too many spaces before colon')
+        if problem is not None:
+            yield problem
+
+        problem = spaces_after(token, prev, next,
+                               max=conf['max-spaces-after'],
+                               max_desc='too many spaces after colon')
+        if problem is not None:
+            yield problem
+
+    if isinstance(token, yaml.KeyToken) and is_explicit_key(token):
+        problem = spaces_after(token, prev, next,
+                               max=conf['max-spaces-after'],
+                               max_desc='too many spaces after question mark')
+        if problem is not None:
+            yield problem