Separate device functionality into plugins.

lib/roles/device/plugins/logcat.js

@@ -0,0 +1,67 @@
+var syrup = require('syrup')
+
+var logger = require('../../../util/logger')
+var wire = require('../../../wire')
+var wireutil = require('../../../wire/util')
+
+module.exports = syrup()
+  .dependency(require('./adb'))
+  .dependency(require('./router'))
+  .dependency(require('./quit'))
+  .define(function(options, adb, router, quit) {
+    var log = logger.createLogger('device:plugins:logcat')
+
+    function openService() {
+      log.info('Launching logcat service')
+      return adb.openLogcat(options.serial)
+        .then(function(logcat) {
+          return logcat
+            .on('error', function(err) {
+              log.fatal('Logcat had an error', err)
+              quit.fatal()
+            })
+            .on('end', function() {
+              log.fatal('Logcat ended')
+              quit.fatal()
+            })
+        })
+    }
+
+    return openService()
+      .then(function(logcat) {
+        function reset() {
+          logcat
+            .resetFilters()
+            .excludeAll()
+        }
+
+        function entryListener(entry) {
+          push.send([
+            owner.group
+          , wireutil.envelope(new wire.DeviceLogcatEntryMessage(
+              options.serial
+            , entry.date.getTime() / 1000
+            , entry.pid
+            , entry.tid
+            , entry.priority
+            , entry.tag
+            , entry.message
+            ))
+          ])
+        }
+
+        logcat.on('entry', entryListener)
+
+        router
+          .on(wire.LogcatApplyFiltersMessage, function(channel, message) {
+            reset()
+            message.filters.forEach(function(filter) {
+              logcat.include(filter.tag, filter.priority)
+            })
+          })
+
+        reset()
+
+        return logcat
+      })
+  })