bundling required python dependencies, to make it easier on Tails users

lib/markupsafe/_native.py

@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+"""
+    markupsafe._native
+    ~~~~~~~~~~~~~~~~~~
+
+    Native Python implementation the C module is not compiled.
+
+    :copyright: (c) 2010 by Armin Ronacher.
+    :license: BSD, see LICENSE for more details.
+"""
+from markupsafe import Markup
+from markupsafe._compat import text_type
+
+
+def escape(s):
+    """Convert the characters &, <, >, ' and " in string s to HTML-safe
+    sequences.  Use this if you need to display text that might contain
+    such characters in HTML.  Marks return value as markup string.
+    """
+    if hasattr(s, '__html__'):
+        return s.__html__()
+    return Markup(text_type(s)
+        .replace('&', '&amp;')
+        .replace('>', '&gt;')
+        .replace('<', '&lt;')
+        .replace("'", '&#39;')
+        .replace('"', '&#34;')
+    )
+
+
+def escape_silent(s):
+    """Like :func:`escape` but converts `None` into an empty
+    markup string.
+    """
+    if s is None:
+        return Markup()
+    return escape(s)
+
+
+def soft_unicode(s):
+    """Make a string unicode if it isn't already.  That way a markup
+    string is not converted back to unicode.
+    """
+    if not isinstance(s, text_type):
+        s = text_type(s)
+    return s