* first action! (#1)

node_modules/pacote/lib/util/pack-dir.js

@@ -0,0 +1,44 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const cacache = require('cacache')
+const cacheKey = require('./cache-key')
+const optCheck = require('./opt-check')
+const packlist = require('npm-packlist')
+const pipe = BB.promisify(require('mississippi').pipe)
+const tar = require('tar')
+
+module.exports = packDir
+function packDir (manifest, label, dir, target, opts) {
+  opts = optCheck(opts)
+
+  const packer = opts.dirPacker
+    ? BB.resolve(opts.dirPacker(manifest, dir))
+    : mkPacker(dir)
+
+  if (!opts.cache) {
+    return packer.then(packer => pipe(packer, target))
+  } else {
+    const cacher = cacache.put.stream(
+      opts.cache, cacheKey('packed-dir', label), opts
+    ).on('integrity', i => {
+      target.emit('integrity', i)
+    })
+    return packer.then(packer => BB.all([
+      pipe(packer, cacher),
+      pipe(packer, target)
+    ]))
+  }
+}
+
+function mkPacker (dir) {
+  return packlist({ path: dir }).then(files => {
+    return tar.c({
+      cwd: dir,
+      gzip: true,
+      portable: true,
+      prefix: 'package/'
+    }, files)
+  })
+}