Rename "roles" to "units". Put units in their own folders.

lib/units/storage/plugins/apk/index.js

@@ -0,0 +1,54 @@
+var http = require('http')
+var url = require('url')
+
+var express = require('express')
+var httpProxy = require('http-proxy')
+
+var logger = require('../../../../util/logger')
+var download = require('../../../../util/download')
+var manifest = require('./task/manifest')
+
+module.exports = function(options) {
+  var log = logger.createLogger('storage:plugins:apk')
+    , app = express()
+    , server = http.createServer(app)
+    , proxy = httpProxy.createProxyServer()
+
+  proxy.on('error', function(err) {
+    log.error('Proxy had an error', err.stack)
+  })
+
+  app.set('strict routing', true)
+  app.set('case sensitive routing', true)
+  app.set('trust proxy', true)
+
+  app.get('/api/v1/s/apk/:id/*/manifest', function(req, res) {
+    download(url.resolve(options.storageUrl, req.url), {
+        dir: options.cacheDir
+      })
+      .then(manifest)
+      .then(function(data) {
+        res.status(200)
+          .json({
+            success: true
+          , manifest: data
+          })
+      })
+      .catch(function(err) {
+        log.error('Unable to read manifest of "%s"', req.params.id, err.stack)
+        res.status(500)
+          .json({
+            success: false
+          })
+      })
+  })
+
+  app.get('/api/v1/s/apk/:id/*', function(req, res) {
+    proxy.web(req, res, {
+      target: options.storageUrl
+    })
+  })
+
+  server.listen(options.port)
+  log.info('Listening on port %d', options.port)
+}

lib/units/storage/plugins/apk/task/manifest.js

@@ -0,0 +1,19 @@
+var Promise = require('bluebird')
+var ApkReader = require('adbkit-apkreader')
+
+module.exports = function(file) {
+  var resolver = Promise.defer()
+
+  process.nextTick(function() {
+    try {
+      var reader = ApkReader.readFile(file.path)
+      var manifest = reader.readManifestSync()
+      resolver.resolve(manifest)
+    }
+    catch (err) {
+      resolver.reject(err)
+    }
+  })
+
+  return resolver.promise
+}