Revert "Remove the create_ios_framework.py tool. (#2946)" (#2950)

This reverts commit 26f89708.

sky/tools/create_ios_framework.py

+#!/usr/bin/env python
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import subprocess
+import shutil
+import sys
+import os
+
+
+def main():
+  parser = argparse.ArgumentParser(description='Creates Flutter.framework')
+
+  parser.add_argument('--dst', type=str, required=True)
+  parser.add_argument('--device-out-dir', type=str, required=True)
+  parser.add_argument('--simulator-out-dir', type=str, required=True)
+
+  args = parser.parse_args()
+
+  fat_framework = os.path.join(args.dst, 'Flutter.framework')
+  device_framework = os.path.join(args.device_out_dir, 'Flutter.framework')
+  simulator_framework = os.path.join(args.simulator_out_dir, 'Flutter.framework')
+
+  device_dylib = os.path.join(device_framework, 'Flutter')
+  simulator_dylib = os.path.join(simulator_framework, 'Flutter')
+
+  if not os.path.isdir(device_framework):
+    print 'Cannot find iOS device Framework at', device_framework
+    return 1
+
+  if not os.path.isdir(simulator_framework):
+    print 'Cannot find iOS simulator Framework at', simulator_framework
+    return 1
+
+  if not os.path.isfile(device_dylib):
+    print 'Cannot find iOS device dylib at', device_dylib
+    return 1
+
+  if not os.path.isfile(simulator_dylib):
+    print 'Cannot find iOS simulator dylib at', simulator_dylib
+    return 1
+
+  shutil.rmtree(fat_framework, True)
+  shutil.copytree(device_framework, fat_framework)
+
+  subprocess.call([
+    'lipo',
+    device_dylib,
+    simulator_dylib,
+    '-create',
+    '-output',
+    os.path.join(fat_framework, 'Flutter')
+  ])
+
+
+if __name__ == '__main__':
+  sys.exit(main())