michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * This script compares the AST of two JavaScript files passed as arguments.
michael@0:  * The script exits with a 0 status code if both files parse properly and the
michael@0:  * ASTs of both files are identical modulo location differences. The script
michael@0:  * exits with status code 1 if any of these conditions don't hold.
michael@0:  *
michael@0:  * This script is used as part of packaging to verify minified JavaScript files
michael@0:  * are identical to their original files.
michael@0:  */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: function ast(filename) {
michael@0:   return JSON.stringify(Reflect.parse(snarf(filename), {loc: 0}));
michael@0: }
michael@0: 
michael@0: if (scriptArgs.length !== 2) {
michael@0:   throw "usage: js js-compare-ast.js FILE1.js FILE2.js";
michael@0: }
michael@0: 
michael@0: let ast0 = ast(scriptArgs[0]);
michael@0: let ast1 = ast(scriptArgs[1]);
michael@0: 
michael@0: quit(ast0 == ast1 ? 0 : 1);