1 #!/usr/bin/env python 2 # Copyright 2015 the V8 project authors. All rights reserved. 3 # Copyright 2015 The Chromium Authors. All rights reserved. 4 # Use of this source code is governed by a BSD-style license that can be 5 # found in the LICENSE file. 6 7 """Script to download LLVM gold plugin from google storage.""" 8 9 import json 10 import os 11 import re 12 import platform 13 import shutil 14 import subprocess 15 import sys 16 import zipfile 17 18 # Bail out on windows and cygwin. 19 if "win" in platform.system().lower(): 20 # Python 2.7.6 hangs at the second path.insert command on windows. Works 21 # with python 2.7.8. 22 print "Gold plugin download not supported on windows." 23 sys.exit(0) 24 25 SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__)) 26 CHROME_SRC = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir)) 27 sys.path.insert(0, os.path.join(CHROME_SRC, 'tools')) 28 29 import find_depot_tools 30 31 DEPOT_PATH = find_depot_tools.add_depot_tools_to_path() 32 GSUTIL_PATH = os.path.join(DEPOT_PATH, 'gsutil.py') 33 34 LLVM_BUILD_PATH = os.path.join(CHROME_SRC, 'third_party', 'llvm-build', 35 'Release+Asserts') 36 CLANG_UPDATE_PY = os.path.join(CHROME_SRC, 'tools', 'clang', 'scripts', 37 'update.py') 38 CLANG_REVISION = os.popen(CLANG_UPDATE_PY + ' --print-revision').read().rstrip() 39 40 CLANG_BUCKET = 'gs://chromium-browser-clang/Linux_x64' 41 42 GOLD_PLUGIN_PATH = os.path.join(LLVM_BUILD_PATH, 'lib', 'LLVMgold.so') 43 44 sys.path.insert(0, os.path.join(CHROME_SRC, 'tools', 'clang', 'scripts')) 45 46 import update 47 48 def main(): 49 if not re.search(r'cfi_vptr=1', os.environ.get('GYP_DEFINES', '')): 50 # Bailout if this is not a cfi build. 51 print 'Skipping gold plugin download for non-cfi build.' 52 return 0 53 if (os.path.exists(GOLD_PLUGIN_PATH) and 54 update.ReadStampFile().strip() == update.PACKAGE_VERSION): 55 # Bailout if clang is up-to-date. This requires the script to be run before 56 # the clang update step! I.e. afterwards clang would always be up-to-date. 57 print 'Skipping gold plugin download. File present and clang up to date.' 58 return 0 59 60 # Make sure this works on empty checkouts (i.e. clang not downloaded yet). 61 if not os.path.exists(LLVM_BUILD_PATH): 62 os.makedirs(LLVM_BUILD_PATH) 63 64 targz_name = 'llvmgold-%s.tgz' % CLANG_REVISION 65 remote_path = '%s/%s' % (CLANG_BUCKET, targz_name) 66 67 os.chdir(LLVM_BUILD_PATH) 68 69 # TODO(pcc): Fix gsutil.py cp url file < /dev/null 2>&0 70 # (currently aborts with exit code 1, 71 # https://github.com/GoogleCloudPlatform/gsutil/issues/289) or change the 72 # stdin->stderr redirect in update.py to do something else (crbug.com/494442). 73 subprocess.check_call(['python', GSUTIL_PATH, 74 'cp', remote_path, targz_name], 75 stderr=open('/dev/null', 'w')) 76 subprocess.check_call(['tar', 'xzf', targz_name]) 77 os.remove(targz_name) 78 return 0 79 80 if __name__ == '__main__': 81 sys.exit(main()) 82
