Put all prebuild scripts in external files.

build/v8.xcodeproj/project.pbxproj

Index: build/v8.xcodeproj/project.pbxproj
===================================================================
--- build/v8.xcodeproj/project.pbxproj	(revision 2047)
+++ build/v8.xcodeproj/project.pbxproj	(working copy)
@@ -721,7 +721,7 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 8970F2F70E719FC1006AE7B5 /* Build configuration list for PBXNativeTarget "v8" */;
 			buildPhases = (
-				89EA6FB50E71AA1F00F59E1B /* ShellScript */,
+				89EA6FB50E71AA1F00F59E1B /* Pre-Build */,
 				8970F2ED0E719FB2006AE7B5 /* Sources */,
 				8970F2EE0E719FB2006AE7B5 /* Frameworks */,
 			);
@@ -790,18 +790,20 @@
 /* End PBXProject section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		89EA6FB50E71AA1F00F59E1B /* ShellScript */ = {
+		89EA6FB50E71AA1F00F59E1B /* Pre-Build */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
+			name = "Pre-Build";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "set -ex\nJS_FILES=\"runtime.js\"\\\n\" v8natives.js\"\\\n\" array.js\"\\\n\" string.js\"\\\n\" uri.js\"\\\n\" math.js\"\\\n\" messages.js\"\\\n\" apinatives.js\"\\\n\" debug-delay.js\"\\\n\" mirror-delay.js\"\\\n\" date-delay.js\"\\\n\" regexp-delay.js\"\\\n\" macros.py\"\n\nV8ROOT=\"${SRCROOT}/../v8\"\n\nSRC_DIR=\"${V8ROOT}/src\"\n\nNATIVE_JS_FILES=\"\"\n\nfor i in ${JS_FILES} ; do\n  NATIVE_JS_FILES+=\"${SRC_DIR}/${i} \"\ndone\n\nV8_GENERATED_SOURCES_DIR=\"${CONFIGURATION_TEMP_DIR}/generated\"\nmkdir -p \"${V8_GENERATED_SOURCES_DIR}\"\n\nLIBRARIES_CC=\"${V8_GENERATED_SOURCES_DIR}/libraries.cc\"\nLIBRARIES_EMPTY_CC=\"${V8_GENERATED_SOURCES_DIR}/libraries-empty.cc\"\n\npython \"${V8ROOT}/tools/js2c.py\" \\\n  \"${LIBRARIES_CC}.new\" \\\n  \"${LIBRARIES_EMPTY_CC}.new\" \\\n  ${NATIVE_JS_FILES}\n\n# Only use the new files if they're different from the existing files (if any),\n# preserving the existing files' timestamps when there are no changes.  This\n# minimizes unnecessary build activity for a no-change build.\n\nif ! diff -q \"${LIBRARIES_CC}.new\" \"${LIBRARIES_CC}\" >& /dev/null ; then\n  mv \"${LIBRARIES_CC}.new\" \"${LIBRARIES_CC}\"\nelse\n  rm \"${LIBRARIES_CC}.new\"\nfi\n\nif ! diff -q \"${LIBRARIES_EMPTY_CC}.new\" \"${LIBRARIES_EMPTY_CC}\" >& /dev/null ; then\n  mv \"${LIBRARIES_EMPTY_CC}.new\" \"${LIBRARIES_EMPTY_CC}\"\nelse\n  rm \"${LIBRARIES_EMPTY_CC}.new\"\nfi\n";
+			shellScript = "set -ex\nexec \"${PROJECT_FILE_PATH}/${PRODUCT_NAME}_prebuild.sh\" \"${@}\"\n";
+			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */