add convert_sprite_json script

tools/scripts/convert_sprite_json.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+
+import glob
+import os
+import re
+import sys
+
+
+TEMPLATE = r"""<?xml version="1.0" encoding="utf-8" ?>
+<XnaContent>
+  <Asset Type="System.String">
+<![CDATA[
+%s
+]]>
+  </Asset>
+</XnaContent>
+"""
+
+
+def main(args):
+  this_dir = os.path.dirname(os.path.realpath(__file__))
+  sneak_root = os.path.join(this_dir, '..', '..', '..')
+  os.chdir(sneak_root)
+
+  json_files = sorted(glob.glob('Content/sprites/**/*.json', recursive=True))
+  for json_file in json_files:
+    with open(json_file) as json:
+      outfile_name = re.sub(r'.json$', '_json.xml', json_file)
+      result = TEMPLATE % json.read()
+      with open(outfile_name, 'w') as out:
+        out.write(result)
+
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))