added webassets TypeScript filter

README.rst

@@ -56,6 +56,19 @@ The TypeScript compiler can be used through the
 
 Currently the compiler has built-in options and doesn't accept additional ones,
 
+The DukPY based TypeScript compiler also provides a WebAssets (
+http://webassets.readthedocs.org/en/latest/ ) filter to automatically
+compile ES6 code in your assets pipeline.  You register this filter as
+``typescript`` within WebAssets using:
+
+.. code:: python
+
+    from webassets.filter import register_filter
+    from dukpy.webassets import TypeScript
+
+    register_filter(TypeScript)
+
+Which makes the filter available with the ``typescript`` name.
 
 EcmaScript6 BabelJS Transpiler
 ------------------------------

dukpy/webassets/__init__.py

@@ -1 +1,2 @@
 from .babelfilter import BabelJS
+from .typescriptfilter import TypeScript

dukpy/webassets/typescriptfilter.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import, print_function
+from webassets.filter import Filter
+
+import dukpy
+
+
+__all__ = ('TypeScript', )
+
+
+class TypeScript(Filter):
+    name = 'typescript'
+    max_debug_level = None
+
+    def setup(self):
+        super(TypeScript, self).setup()
+
+    def input(self, _in, out, **kw):
+        src = dukpy.typescript_compile(_in.read())
+        out.write(src['code'])

setup.py

@@ -18,7 +18,7 @@ setup(
     version='0.0.1',
     description='Simple JavaScript interpreter for Python',
     long_description=README,
-    keywords='javascript compiler babeljs coffeescript',
+    keywords='javascript compiler babeljs coffeescript typescript',
     author='Alessandro Molina',
     author_email='alessandro.molina@axant.it',
     url='https://github.com/amol-/dukpy',