Add script to update Closure Compiler version and chrome_extensions.js

third_party/closure_compiler/bump_compiler_version

+#!/bin/bash
+# Copyright 2014 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.
+#
+# Download the newest version of Closure Compiler, build it and put into Chrome
+# source tree. Also update externs/chrome_extensions.js.
+#
+# How to update compiler version in Chrome source:
+# a) Run this script.
+# b) Add third_party/closure_compiler/compiler/compiler.jar and
+#    third_party/closure_compiler/externs/chrome_extensions.js
+# c) Commit.
+
+readonly SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

[Dan Beam, 2014/09/18 21:26:07]

readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

[Vitaly Pavlenko, 2014/09/18 21:49:43]

Done.

+readonly TEMP_DIR=$(mktemp -d)
+
+cd "${TEMP_DIR}"
+echo "Cloning Closure Compiler repo"
+git clone https://github.com/google/closure-compiler.git
+
+cd closure-compiler
+echo "Building Closure Compiler"
+ant jar
+
+if [[ -e build/compiler.jar ]] ; then
+  echo "Copying compiler.jar and chrome_extensions.js"
+  cp build/compiler.jar "${SCRIPT_DIR}/compiler/"
+  cp contrib/externs/chrome_extensions.js "${SCRIPT_DIR}/externs/"
+  echo "Done"
+else
+  echo "Failed to build jar, copy nothing"

[Dan Beam, 2014/09/18 21:26:08]

we need to exit with non-zero exit status somehow here

[Vitaly Pavlenko, 2014/09/18 21:49:43]

Done.

+fi
+
+rm -rf "${TEMP_DIR}"