Put all prebuild scripts in external files.

build/v8.xcodeproj/v8_prebuild.sh

+#!/bin/sh
+
+# Copyright (c) 2008 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.
+
+set -ex
+JS_FILES="runtime.js \
+          v8natives.js \
+          array.js \
+          string.js \
+          uri.js \
+          math.js \
+          messages.js \
+          apinatives.js \
+          debug-delay.js \
+          mirror-delay.js \
+          date-delay.js \
+          regexp-delay.js \
+          macros.py"
+
+V8ROOT="${SRCROOT}/../v8"
+
+SRC_DIR="${V8ROOT}/src"
+
+NATIVE_JS_FILES=""
+
+for i in ${JS_FILES} ; do
+  NATIVE_JS_FILES+="${SRC_DIR}/${i} "
+done
+
+V8_GENERATED_SOURCES_DIR="${CONFIGURATION_TEMP_DIR}/generated"
+mkdir -p "${V8_GENERATED_SOURCES_DIR}"
+
+LIBRARIES_CC="${V8_GENERATED_SOURCES_DIR}/libraries.cc"
+LIBRARIES_EMPTY_CC="${V8_GENERATED_SOURCES_DIR}/libraries-empty.cc"
+
+python "${V8ROOT}/tools/js2c.py" \
+  "${LIBRARIES_CC}.new" \
+  "${LIBRARIES_EMPTY_CC}.new" \
+  ${NATIVE_JS_FILES}
+
+# Only use the new files if they're different from the existing files (if any),
+# preserving the existing files' timestamps when there are no changes.  This
+# minimizes unnecessary build activity for a no-change build.
+
+if ! diff -q "${LIBRARIES_CC}.new" "${LIBRARIES_CC}" >& /dev/null
+then
+  mv "${LIBRARIES_CC}.new" "${LIBRARIES_CC}"
+else
+  rm "${LIBRARIES_CC}.new"
+fi
+
+if ! diff -q "${LIBRARIES_EMPTY_CC}.new" "${LIBRARIES_EMPTY_CC}" >& /dev/null
+then
+  mv "${LIBRARIES_EMPTY_CC}.new" "${LIBRARIES_EMPTY_CC}"
+else
+  rm "${LIBRARIES_EMPTY_CC}.new"
+fi