'use strict' | |
var fs = require('fs') | |
var PassThrough = require('stream').PassThrough | |
var Transform = require('stream').Transform | |
if (typeof Transform === 'undefined') { | |
throw new Error('UglifyJS only supports browserify when using node >= 0.10.x') | |
} | |
var cache = {} | |
module.exports = transform | |
function transform(file) { | |
if (!/tools\/node\.js$/.test(file.replace(/\\/g,'/'))) return new PassThrough(); | |
if (cache[file]) return makeStream(cache[file]) | |
var uglify = require(file) | |
var src = 'var sys = require("util");\nvar MOZ_SourceMap = require("source-map");\nvar UglifyJS = exports;\n' + uglify.FILES.map(function (path) { return fs.readFileSync(path, 'utf8') }).join('\n') | |
var ast = uglify.parse(src) | |
ast.figure_out_scope() | |
var variables = ast.variables | |
.map(function (node, name) { | |
return name | |
}) | |
src += '\n\n' + variables.map(function (v) { return 'exports.' + v + ' = ' + v + ';' }).join('\n') + '\n\n' | |
src += 'exports.AST_Node.warn_function = function (txt) { if (typeof console != "undefined" && typeof console.warn === "function") console.warn(txt) }\n\n' | |
src += 'exports.minify = ' + uglify.minify.toString() + ';\n\n' | |
src += 'exports.describe_ast = ' + uglify.describe_ast.toString() + ';' | |
// TODO: remove once https://github.com/substack/node-browserify/issues/631 is resolved | |
src = src.replace(/"for"/g, '"fo" + "r"') | |
cache[file] = src | |
return makeStream(src); | |
} | |
function makeStream(src) { | |
var res = new Transform(); | |
res._transform = function (chunk, encoding, callback) { callback() } | |
res._flush = function (callback) { | |
res.push(src) | |
callback() | |
} | |
return res; | |
} |