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Diffstat (limited to '')
-rw-r--r-- | toolkit/mozapps/installer/js-compare-ast.js | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/toolkit/mozapps/installer/js-compare-ast.js b/toolkit/mozapps/installer/js-compare-ast.js new file mode 100644 index 0000000000..ed660d3f8a --- /dev/null +++ b/toolkit/mozapps/installer/js-compare-ast.js @@ -0,0 +1,31 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * This script compares the AST of two JavaScript files passed as arguments. + * The script exits with a 0 status code if both files parse properly and the + * ASTs of both files are identical modulo location differences. The script + * exits with status code 1 if any of these conditions don't hold. + * + * This script is used as part of packaging to verify minified JavaScript files + * are identical to their original files. + */ + +// Available to the js shell. +/* global snarf, scriptArgs, quit */ + +"use strict"; + +function ast(filename) { + return JSON.stringify(Reflect.parse(snarf(filename), { loc: 0 })); +} + +if (scriptArgs.length !== 2) { + throw new Error("usage: js js-compare-ast.js FILE1.js FILE2.js"); +} + +var ast0 = ast(scriptArgs[0]); +var ast1 = ast(scriptArgs[1]); + +quit(ast0 == ast1 ? 0 : 1); |