support adding symlinks to zip files

build/android/gyp/util/build_utils.py

 # Copyright 2013 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 ast
 import contextlib
 import fnmatch
 import json
 import os
 import pipes
@@ skipping 249 matching lines @@
     data: File data as a string.
     compress: Whether to enable compression. Default is take from ZipFile
         constructor.
   """
   assert (src_path is None) != (data is None), (
       '|src_path| and |data| are mutually exclusive.')
   CheckZipPath(zip_path)
   zipinfo = zipfile.ZipInfo(filename=zip_path, date_time=_HERMETIC_TIMESTAMP)
   zipinfo.external_attr = _HERMETIC_FILE_ATTR
 
+  if src_path and os.path.islink(src_path):
+    zipinfo.filename = zip_path
+    zipinfo.external_attr |= stat.S_IFLNK << 16L # mark as a symlink
+    zip_file.writestr(zipinfo, os.readlink(src_path))
+    return
+
   if src_path:
     with file(src_path) as f:
       data = f.read()
 
   # zipfile will deflate even when it makes the file bigger. To avoid
   # growing files, disable compression at an arbitrary cut off point.
   if len(data) < 16:
     compress = False
 
   # None converts to ZIP_STORED, when passed explicitly rather than the
@@ skipping 235 matching lines @@
 
   md5_check.CallAndRecordIfStale(
       on_stale_md5,
       record_path=record_path,
       input_paths=input_paths,
       input_strings=input_strings,
       output_paths=output_paths,
       force=force,
       pass_changes=True)