--- a/python/s5ify.py	Mon Jan 04 12:56:15 2016 -0800
+++ b/python/s5ify.py	Wed Jan 06 09:44:57 2016 -0800
@@ -27,5 +27,19 @@
         parser.error("Not a file: '{}'".format(input))
     input = os.path.abspath(options.input)
 
+    # get output name from input
+    output_filename = os.path.splitext(os.path.basename(input))[0] + '.html'
+    output = os.path.join(os.path.dirname(input), output_filename)
+
+    # build command line
+    options = []
+    command = ['rst2s5.py']
+    command.extend(options)
+    command.extend([input, output])
+    print subprocess.list2cmdline(command)
+
+    # call it
+    subprocess.call(command)
+
 if __name__ == '__main__':
     main()