1'use strict'
2
3var fs = require('fs')
4var PassThrough = require('stream').PassThrough
5var Transform = require('stream').Transform
6
7if (typeof Transform === 'undefined') {
8  throw new Error('UglifyJS only supports browserify when using node >= 0.10.x')
9}
10
11var cache = {}
12module.exports = transform
13function transform(file) {
14  if (!/tools\/node\.js$/.test(file.replace(/\\/g,'/'))) return new PassThrough();
15  if (cache[file]) return makeStream(cache[file])
16  var uglify = require(file)
17  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')
18
19  var ast = uglify.parse(src)
20  ast.figure_out_scope()
21
22  var variables = ast.variables
23    .map(function (node, name) {
24      return name
25    })
26
27  src += '\n\n' + variables.map(function (v) { return 'exports.' + v + ' = ' + v + ';' }).join('\n') + '\n\n'
28
29  src += 'exports.AST_Node.warn_function = function (txt) { if (typeof console != "undefined" && typeof console.warn === "function") console.warn(txt) }\n\n'
30
31  src += 'exports.minify = ' + uglify.minify.toString() + ';\n\n'
32  src += 'exports.describe_ast = ' + uglify.describe_ast.toString() + ';'
33
34  // TODO: remove once https://github.com/substack/node-browserify/issues/631 is resolved
35  src = src.replace(/"for"/g, '"fo" + "r"')
36
37  cache[file] = src
38  return makeStream(src);
39}
40
41function makeStream(src) {
42  var res = new Transform();
43  res._transform = function (chunk, encoding, callback) { callback() }
44  res._flush = function (callback) {
45    res.push(src)
46    callback()
47  }
48  return res;
49}
50