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var fs = require("fs"), path = require("path")

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var stream = require("stream")

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var browserify = require("browserify")

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var babelify = require("babelify").configure({loose: "all"})

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process.chdir(path.resolve(__dirname, ".."))

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browserify({standalone: "acorn"})

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  .plugin(require('browserify-derequire'))

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  .transform(babelify)

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  .require("./src/index.js", {entry: true})

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  .bundle()

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  .on("error", function (err) { console.log("Error: " + err.message) })

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  .pipe(fs.createWriteStream("dist/acorn.js"))

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function acornShim(file) {

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  var tr = new stream.Transform

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  if (file == path.resolve(__dirname, "../src/index.js")) {

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    var sent = false

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    tr._transform = function(chunk, _, callback) {

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      if (!sent) {

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        sent = true

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        callback(null, "module.exports = typeof acorn != 'undefined' ? acorn : _dereq_(\"./acorn\")")

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      } else {

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        callback()

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      }

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    }

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  } else {

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    tr._transform = function(chunk, _, callback) { callback(null, chunk) }

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  }

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  return tr

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}

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browserify({standalone: "acorn.loose"})

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  .plugin(require('browserify-derequire'))

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  .transform(acornShim)

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  .transform(babelify)

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  .require("./src/loose/index.js", {entry: true})

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  .bundle()

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  .on("error", function (err) { console.log("Error: " + err.message) })

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  .pipe(fs.createWriteStream("dist/acorn_loose.js"))

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browserify({standalone: "acorn.walk"})

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  .plugin(require('browserify-derequire'))

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  .transform(acornShim)

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  .transform(babelify)

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  .require("./src/walk/index.js", {entry: true})

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  .bundle()

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  .on("error", function (err) { console.log("Error: " + err.message) })

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  .pipe(fs.createWriteStream("dist/walk.js"))

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