Download prebuilt clang

.gitignore

@@ -6,6 +6,8 @@
 /vendor/brightray/vendor/download/
 /vendor/python_26/
 /vendor/npm/
+/vendor/llvm/
+/vendor/llvm-build/
 /vendor/.gclient
 node_modules/
 *.xcodeproj

script/bootstrap.py

@@ -29,6 +29,9 @@ def main():
   update_node_modules('.')
   bootstrap_brightray(args.dev, args.url, args.target_arch)
 
+  if PLATFORM != 'win32':
+    update_clang()
+
   create_chrome_version_h()
   touch_config_gypi()
   run_update()
@@ -105,6 +108,11 @@ def update_win32_python():
     if not os.path.exists('python_26'):
       execute_stdout(['git', 'clone', PYTHON_26_URL])
 
+
+def update_clang():
+  execute_stdout([os.path.join(SOURCE_ROOT, 'script', 'update-clang.sh')])
+
+
 def create_chrome_version_h():
   version_file = os.path.join(SOURCE_ROOT, 'vendor', 'brightray', 'vendor',
                               'libchromiumcontent', 'VERSION')

script/update-clang.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+# 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.
+
+# This script will check out llvm and clang into third_party/llvm and build it.
+
+# Do NOT CHANGE this if you don't know what you're doing -- see
+# https://code.google.com/p/chromium/wiki/UpdatingClang
+# Reverting problematic clang rolls is safe, though.
+CLANG_REVISION=233105
+
+# This is incremented when pushing a new build of Clang at the same revision.
+CLANG_SUB_REVISION=1
+
+PACKAGE_VERSION="${CLANG_REVISION}-${CLANG_SUB_REVISION}"
+
+THIS_DIR="$(dirname "${0}")"
+LLVM_DIR="${THIS_DIR}/../vendor/llvm"
+LLVM_BUILD_DIR="${LLVM_DIR}/../llvm-build/Release+Asserts"
+STAMP_FILE="${LLVM_DIR}/../llvm-build/cr_build_revision"
+
+# ${A:-a} returns $A if it's set, a else.
+LLVM_REPO_URL=${LLVM_URL:-https://llvm.org/svn/llvm-project}
+
+CDS_URL=https://commondatastorage.googleapis.com/chromium-browser-clang
+
+
+# Die if any command dies, error on undefined variable expansions.
+set -eu
+
+
+OS="$(uname -s)"
+
+# Check if there's anything to be done, exit early if not.
+if [[ -f "${STAMP_FILE}" ]]; then
+  PREVIOUSLY_BUILT_REVISON=$(cat "${STAMP_FILE}")
+  if [[ "${PREVIOUSLY_BUILT_REVISON}" = "${PACKAGE_VERSION}" ]]; then
+    echo "Clang already at ${PACKAGE_VERSION}"
+    exit 0
+  fi
+fi
+# To always force a new build if someone interrupts their build half way.
+rm -f "${STAMP_FILE}"
+
+# Check if there's a prebuilt binary and if so just fetch that. That's faster,
+# and goma relies on having matching binary hashes on client and server too.
+CDS_FILE="clang-${PACKAGE_VERSION}.tgz"
+CDS_OUT_DIR=$(mktemp -d -t clang_download.XXXXXX)
+CDS_OUTPUT="${CDS_OUT_DIR}/${CDS_FILE}"
+if [ "${OS}" = "Linux" ]; then
+  CDS_FULL_URL="${CDS_URL}/Linux_x64/${CDS_FILE}"
+elif [ "${OS}" = "Darwin" ]; then
+  CDS_FULL_URL="${CDS_URL}/Mac/${CDS_FILE}"
+fi
+echo Trying to download prebuilt clang
+if which curl > /dev/null; then
+  curl -L --fail "${CDS_FULL_URL}" -o "${CDS_OUTPUT}" || \
+      rm -rf "${CDS_OUT_DIR}"
+elif which wget > /dev/null; then
+  wget "${CDS_FULL_URL}" -O "${CDS_OUTPUT}" || rm -rf "${CDS_OUT_DIR}"
+else
+  echo "Neither curl nor wget found. Please install one of these."
+  exit 1
+fi
+if [ -f "${CDS_OUTPUT}" ]; then
+  rm -rf "${LLVM_BUILD_DIR}"
+  mkdir -p "${LLVM_BUILD_DIR}"
+  tar -xzf "${CDS_OUTPUT}" -C "${LLVM_BUILD_DIR}"
+  echo clang "${PACKAGE_VERSION}" unpacked
+  echo "${PACKAGE_VERSION}" > "${STAMP_FILE}"
+  rm -rf "${CDS_OUT_DIR}"
+  exit 0
+else
+  echo Did not find prebuilt clang "${PACKAGE_VERSION}", building
+fi