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Viewing / Editing File: pack.js

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// npm pack <pkg>
// Packs the specified package into a .tgz file, which can then
// be installed.

module.exports = pack

var install = require('./install.js')
var cache = require('./cache.js')
var fs = require('graceful-fs')
var chain = require('slide').chain
var path = require('path')
var cwd = process.cwd()
var writeStreamAtomic = require('fs-write-stream-atomic')
var cachedPackageRoot = require('./cache/cached-package-root.js')
var output = require('./utils/output.js')

pack.usage = 'npm pack [[<@scope>/]<pkg>...]'

// if it can be installed, it can be packed.
pack.completion = install.completion

function pack (args, silent, cb) {
  if (typeof cb !== 'function') {
    cb = silent
    silent = false
  }

  if (args.length === 0) args = ['.']

  chain(
    args.map(function (arg) { return function (cb) { pack_(arg, cb) } }),
    function (er, files) {
      if (er || silent) return cb(er, files)
      printFiles(files, cb)
    }
  )
}

function printFiles (files, cb) {
  files = files.map(function (file) {
    return path.relative(cwd, file)
  })
  output(files.join('\n'))
  cb()
}

// add to cache, then cp to the cwd
function pack_ (pkg, cb) {
  cache.add(pkg, null, null, false, function (er, data) {
    if (er) return cb(er)

    // scoped packages get special treatment
    var name = data.name
    if (name[0] === '@') name = name.substr(1).replace(/\//g, '-')
    var fname = name + '-' + data.version + '.tgz'

    var cached = path.join(cachedPackageRoot(data), 'package.tgz')
    var from = fs.createReadStream(cached)
    var to = writeStreamAtomic(fname)
    var errState = null

    from.on('error', cb_)
    to.on('error', cb_)
    to.on('close', cb_)
    from.pipe(to)

    function cb_ (er) {
      if (errState) return
      if (er) return cb(errState = er)
      cb(null, fname)
    }
  })
}
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