Clang toolchain on Linux: compress with XZ, include LLVM Gold plugin.

tools/clang/scripts/update.sh

 #!/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.
@@ skipping 227 matching lines @@
     exit 0
   fi
 fi
 # To always force a new build if someone interrupts their build half way.
 rm -f "${STAMP_FILE}"
 
 
 if [[ -z "$force_local_build" ]]; then
   # Check if there's a prebuilt binary and if so just fetch that. That's faster,
   # and goma relies on having matching binary hashes on client and server too.
-  CDS_FILE="clang-${PACKAGE_VERSION}.tgz"
+  CDS_FILE="clang-${PACKAGE_VERSION}"
   CDS_OUT_DIR=$(mktemp -d -t clang_download.XXXXXX)
-  CDS_OUTPUT="${CDS_OUT_DIR}/${CDS_FILE}"
+  CDS_OUTPUT="${CDS_OUT_DIR}/${CDS_FILE}.tgz"
   if [ "${OS}" = "Linux" ]; then
-    CDS_FULL_URL="${CDS_URL}/Linux_x64/${CDS_FILE}"
+    CDS_OUTPUT="${CDS_OUT_DIR}/${CDS_FILE}.tar.xz"
+    CDS_FULL_URL="${CDS_URL}/Linux_x64/${CDS_FILE}.tar.xz"
   elif [ "${OS}" = "Darwin" ]; then
-    CDS_FULL_URL="${CDS_URL}/Mac/${CDS_FILE}"
+    CDS_FULL_URL="${CDS_URL}/Mac/${CDS_FILE}.tgz"
   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 "${LLVM_BUILD_DIR}"
+    if [ "${OS}" = "Linux"]; then
+      unxz < "${CDS_OUTPUT}" | tar -x -C "${LLVM_BUILD_DIR}"

[hans, 2015/10/05 20:53:57]

Maybe just use tar's -J option?

+    else
+      tar -xzf "${CDS_OUTPUT}" -C "${LLVM_BUILD_DIR}"
+    fi
     echo clang "${PACKAGE_VERSION}" unpacked
     echo "${PACKAGE_VERSION}" > "${STAMP_FILE}"
     rm -rf "${CDS_OUT_DIR}"
     # Download the gold plugin if requested to by an environment variable.
     # This is used by the CFI ClusterFuzz bot.
     if [[ -n "${LLVM_DOWNLOAD_GOLD_PLUGIN}" ]]; then
       ${THIS_DIR}/../../../build/download_gold_plugin.py
     fi
     exit 0
   else
@@ skipping 380 matching lines @@
   # Run Chrome tool tests.
   ninja -C "${LLVM_BUILD_DIR}" cr-check-all
 fi
 if [[ -n "$run_tests" ]]; then
   # Run the LLVM and Clang tests.
   ninja -C "${LLVM_BUILD_DIR}" check-all
 fi
 
 # After everything is done, log success for this revision.
 echo "${PACKAGE_VERSION}" > "${STAMP_FILE}"