Implement --download-data for test harness.

test/test262/testcfg.py

Index: test/test262/testcfg.py
diff --git a/test/test262/testcfg.py b/test/test262/testcfg.py
index aefda196a307db7677702cab6075c99d0cf65a3f..294b39c9163feac30f941e148ac415ce5f8b47ed 100644
--- a/test/test262/testcfg.py
+++ b/test/test262/testcfg.py
@@ -29,8 +29,14 @@
 import test
 import os
 from os.path import join, exists
+import urllib
+import hashlib
+import tarfile
 
 
+TEST_262_ARCHIVE_REVISION = '3a890174343c'  # This is the r309 revision.
+TEST_262_ARCHIVE_MD5 = 'be5d4cfbe69cef70430907b8f3a92b50'
+TEST_262_URL = 'http://hg.ecmascript.org/tests/test262/archive/%s.tar.bz2'
 TEST_262_HARNESS = ['sta.js']
 
 
@@ -93,6 +99,28 @@ class Test262TestConfiguration(test.TestConfiguration):
             tests.append(test)
     return tests
 
+  def DownloadData(self):
+    revision = TEST_262_ARCHIVE_REVISION
+    archive_url = TEST_262_URL % revision
+    archive_name = join(self.root, 'test262-%s.tar.bz2' % revision)
+    directory_name = join(self.root, "test262-%s" % revision)
+    if not exists(directory_name) or not exists(archive_name):
+      if not exists(archive_name):
+        print "Downloading test data from %s ..." % archive_url
+        urllib.urlretrieve(archive_url, archive_name)
+      if not exists(directory_name):
+        print "Extracting test262-%s.tar.bz2 ..." % revision
+        md5 = hashlib.md5()
+        with open(archive_name,'rb') as f:
+          for chunk in iter(lambda: f.read(8192), ''):
+            md5.update(chunk)
+        if md5.hexdigest() != TEST_262_ARCHIVE_MD5:
+          raise Exception("Hash mismatch of test data file")
+        archive = tarfile.open(archive_name, 'r:bz2')
+        archive.extractall(join(self.root))
+      if not exists(join(self.root, 'data')):
+        os.symlink(directory_name, join(self.root, 'data'))
+
   def GetBuildRequirements(self):
     return ['d8']