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