Add example performing babel conversions

helpers/babel.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+""" Transform the input stream using babel.transform """
+import os
+import sys
+
+from py_mini_racer import py_mini_racer
+
+def babel_transform(es_string):
+    """ Transform the provided string using babel.transform """
+
+    path_to_babel = os.path.join(os.path.dirname(__file__), '..', 'tests',
+                                 'fixtures', 'babel.js')
+
+    es6 = '[1,2,3].map(n => n + 1);'
+
+    babel_source = open(path_to_babel, "r").read()
+
+    # Initializes PyMiniRacer
+    ctx = py_mini_racer.MiniRacer()
+
+    # Parse babel
+    ctx.eval("""var self = this; %s """ % babel_source)
+
+    # Transform stuff :)
+    val = "babel.transform(`%s`)['code']" % es_string
+    res = ctx.eval(val)
+    return res
+
+
+if __name__ == '__main__':
+
+    if len(sys.argv) != 1:
+        name = sys.argv[0]
+        sys.stderr.write("Usage: cat es6file.js | %s\n" % name)
+        sys.stderr.write("Example: echo [1,2,3].map(n => n + 1); | %s\n" % name)
+        sys.exit(-1)
+
+    es6_data = sys.stdin.read()
+
+    res = babel_transform(es6_data)
+
+    print(res)