1 files changed, 64 insertions, 0 deletions
diff --git a/media/webrtc/trunk/build/download_nacl_toolchains.py b/media/webrtc/trunk/build/download_nacl_toolchains.py
new file mode 100755
index 000000000..c2007d0f1
--- /dev/null
+++ b/media/webrtc/trunk/build/download_nacl_toolchains.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Shim to run nacl toolchain download script only if there is a nacl dir."""
+
+import os
+import sys
+
+
+def Main(args):
+  # Exit early if disable_nacl=1.
+  if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):
+    return 0
+  script_dir = os.path.dirname(os.path.abspath(__file__))
+  src_dir = os.path.dirname(script_dir)
+  nacl_dir = os.path.join(src_dir, 'native_client')
+  nacl_build_dir = os.path.join(nacl_dir, 'build')
+  download_script = os.path.join(nacl_build_dir, 'download_toolchains.py')
+  if not os.path.exists(download_script):
+    print "Can't find '%s'" % download_script
+    print 'Presumably you are intentionally building without NativeClient.'
+    print 'Skipping NativeClient toolchain download.'
+    sys.exit(0)
+  sys.path.insert(0, nacl_build_dir)
+  import download_toolchains
+
+  # TODO (robertm): Finish getting PNaCl ready for prime time.
+  # BUG:
+  # We remove this --optional-pnacl argument, and instead replace it with
+  # --no-pnacl for most cases.  However, if the bot name is the pnacl_sdk
+  # bot then we will go ahead and download it.  This prevents increasing the
+  # gclient sync time for developers, or standard Chrome bots.
+  if '--optional-pnacl' in args:
+    args.remove('--optional-pnacl')
+    # By default we don't use PNaCl toolchain yet, unless on ARM, where
+    # there is no other toolchain to build untrusted code at the moment.
+    # So analyze if we're building for ARM, or on SDK buildbot.
+    # TODO(olonho): we need to invent more reliable way to get build
+    # configuration info, to know if we're building for ARM.
+    use_pnacl = False
+    if 'target_arch=arm' in os.environ.get('GYP_DEFINES', ''):
+      use_pnacl = True
+    buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
+    if buildbot_name.find('pnacl') >= 0 and  buildbot_name.find('sdk') >= 0:
+      use_pnacl = True
+    if use_pnacl:
+      print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
+    else:
+      args.append('--no-pnacl')
+
+  # Append the name of the file to use as a version and hash source.
+  # NOTE:  While not recommended, it is possible to redirect this file to
+  # a chrome location to avoid branching NaCl if just a toolchain needs
+  # to be bumped.
+  args.append(os.path.join(nacl_dir,'TOOL_REVISIONS'))
+
+  download_toolchains.main(args)
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv[1:]))