Download the dart sdk into third_party/.

tools/dart/update.py

+#!/usr/bin/python
+# Copyright 2015 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.
+
+"""Pulls down the current dart sdk to third_party/dart-sdk/."""
+
+import os
+import subprocess
+import sys
+
+# Path constants. (All of these should be absolute paths.)
+THIS_DIR = os.path.abspath(os.path.dirname(__file__))
+CHROMIUM_DIR = os.path.abspath(os.path.join(THIS_DIR, '..', '..'))
+DART_SDK_DIR = os.path.join(CHROMIUM_DIR, 'third_party', 'dart-sdk')
+
+# TODO(erg): We might want 32 bit linux too? I don't know of anyone who still
+# uses that though. It looks like clang isn't built 32 bit.
+LINUX_64_SDK = ('https://storage.googleapis.com/dart-archive/channels/' +
+                'stable/release/latest/sdk/dartsdk-linux-x64-release.zip')

[zra, 2015/02/17 23:06:06]

Even though we'll only be using this for a short time, it may be good for our
sanity to pin this to a particular version. 43808 should be good.

[Elliot Glaysher, 2015/02/17 23:08:58]

That's probably a good idea. What URL would I use for that? (I played around
trying to get 43808 into the url above but couldn't figure it out.)

+
+OUTPUT_FILE = os.path.join(DART_SDK_DIR, 'dartsdk-linux-x64-release.zip')
+
+def RunCommand(command, fail_hard=True):
+  """Run command and return success (True) or failure; or if fail_hard is
+     True, exit on failure."""
+
+  print 'Running %s' % (str(command))
+  if subprocess.call(' '.join(command), shell=True) == 0:
+    return True
+  print 'Failed.'
+  if fail_hard:
+    sys.exit(1)
+  return False
+
+def main():

[zra, 2015/02/17 23:06:06]

Would it be worthwhile to include an easy way to trigger re-download? If not,
maybe include a comment at the top saying that blowing away
//third_party/dart-sdk will trigger re-download.

+  # For version one, we don't actually redownload if the sdk is already
+  # present. This will be replaced with download_from_google_storage once
+  # it supports tarballs.
+  if not os.path.exists(OUTPUT_FILE):
+    wget_command = ['wget', '-N', '-c', LINUX_64_SDK, '-P', DART_SDK_DIR]
+    if not RunCommand(wget_command, fail_hard=False):
+      print "Failed to get dart sdk from server."
+      return
+
+    unzip_command = ['unzip', OUTPUT_FILE, '-d', DART_SDK_DIR]
+    if not RunCommand(unzip_command, fail_hard=False):
+      print "Failed to unzip the dart sdk."
+
+if __name__ == '__main__':
+  sys.exit(main())