Update build_ios_libs.sh script to build new Objective-C API

talk/build/export_headers

+#!/usr/bin/python
+
+#  Copyright 2016 The WebRTC project authors. All Rights Reserved.
+#
+#  Use of this source code is governed by a BSD-style license
+#  that can be found in the LICENSE file in the root of the source
+#  tree. An additional intellectual property rights grant can be found
+#  in the file PATENTS.  All contributing project authors may
+#  be found in the AUTHORS file in the root of the source tree.
+
+"""Script for exporting iOS header files."""
+
+import errno
+import optparse
+import os
+import re
+import shutil
+import sys
+
+LEGACY_HEADER_DIRS = ['talk/app/webrtc/objc/public']
+HEADER_DIRS = ['webrtc/api/objc/', 'webrtc/base/objc/']
+# Individual header files that should also be exported.
+LEGACY_HEADER_INCLUDES = []
+HEADER_INCLUDES = []
+# Individual header files that should not be exported.
+LEGACY_HEADER_EXCLUDES = ['talk/app/webrtc/objc/public/RTCNSGLVideoView.h']
+HEADER_EXCLUDES = ['webrtc/api/objc/avfoundationvideocapturer.h',
+                   'webrtc/api/objc/RTCNSGLVideoView.h']
+
+def ExportHeaders(include_base_dir, use_new_headers):
+  """Exports iOS header files.
+
+  Creates an include directory and recreates the hierarchy for the header files
+  within the include directory.
+
+  Args:
+    include_base_dir: directory where the include directory should be created
+  """
+
+  include_dir_name = 'include'
+  include_path = os.path.join(include_base_dir, include_dir_name)
+
+  script_path = sys.path[0]
+  webrtc_base_path = os.path.join(script_path, '../..')
+
+  header_dirs = LEGACY_HEADER_DIRS
+  include_headers = LEGACY_HEADER_INCLUDES
+  exclude_headers = LEGACY_HEADER_EXCLUDES
+  if int(use_new_headers):
+    header_dirs = HEADER_DIRS
+    include_headers = HEADER_INCLUDES
+    exclude_headers = HEADER_EXCLUDES
+
+  for directory in header_dirs:
+    full_dir_path = os.path.join(webrtc_base_path, directory)
+    filenames = os.listdir(full_dir_path)
+    for filename in filenames:
+      if filename.endswith('.h') and not filename.endswith('+Private.h'):
+        include_headers.append(os.path.join(directory, filename))
+
+  for header in exclude_headers:
+    include_headers.remove(header)
+
+  for header_path in include_headers:
+    output_dir = os.path.join(include_path, os.path.dirname(header_path))
+    # Create hierarchy for the header file within the include directory.
+    try:
+      os.makedirs(output_dir)
+    except OSError as exc:
+      if exc.errno != errno.EEXIST:
+        raise exc
+    current_path = os.path.join(webrtc_base_path, header_path)
+    new_path = os.path.join(include_path, header_path)
+    shutil.copy(current_path, new_path)
+
+def Main():
+  parser = optparse.OptionParser()
+  _, args = parser.parse_args()
+  if len(args) != 2:
+    parser.error('Error: Exactly 2 arguments required.')
+  include_base_dir = args[0]
+  use_new_headers = args[1]
+  ExportHeaders(include_base_dir, use_new_headers)
+
+if __name__ == '__main__':
+  sys.exit(Main())