Separate device functionality into plugins.

lib/roles/device/plugins/stats.js

@@ -0,0 +1,61 @@
+var syrup = require('syrup')
+var split = require('split')
+
+var logger = require('../../../util/logger')
+var devutil = require('../../../util/devutil')
+
+module.exports = syrup()
+  .dependency(require('./adb'))
+  .dependency(require('./quit'))
+  .dependency(require('../resources/remote'))
+  .define(function(options, adb, quit, remote) {
+    var log = logger.createLogger('device:plugins:stats')
+
+    var service = {
+      port: 2830
+    }
+
+    function openService() {
+      return devutil.ensureUnusedPort(adb, options.serial, service.port)
+        .then(function(port) {
+          return adb.shell(options.serial, [
+              remote.bin
+            , '--lib', remote.lib
+            , '--listen-stats', service.port
+            ])
+            .then(function(out) {
+              out.pipe(split())
+                .on('data', function(chunk) {
+                  log.info('Remote says: "%s"', chunk)
+                })
+                .on('error', function(err) {
+                  log.fatal('Remote shell had an error', err.stack)
+                  quit.fatal()
+                })
+                .on('end', function() {
+                  log.fatal('Remote shell ended')
+                  quit.fatal()
+                })
+            })
+        })
+        .then(function() {
+          return devutil.waitForPort(adb, options.serial, service.port)
+        })
+        .then(function(conn) {
+          conn.pipe(split())
+            .on('error', function(err) {
+              log.fatal('Remote had an error', err.stack)
+              quit.fatal()
+            })
+            .on('end', function() {
+              log.fatal('Remote ended')
+              quit.fatal()
+            })
+        })
+    }
+
+    return openService()
+      .then(function() {
+        return {}
+      })
+  })