extract symbols

boot.js

@@ -10,11 +10,13 @@ const {
   AVV_ERR_ROOT_PLG_BOOTED,
   AVV_ERR_READY_TIMEOUT
 } = require('./lib/errors')
+const {
+  kAvvio,
+  kThenifyDoNotWrap
+} = require('./lib/symbols')
 const TimeTree = require('./time-tree')
 const Plugin = require('./plugin')
 const debug = require('debug')('avvio')
-const kAvvio = Symbol('kAvvio')
-const kThenifyDoNotWrap = Symbol('kThenifyDoNotWrap')
 
 function wrap (server, opts, instance) {
   const expose = opts.expose || {}

lib/symbols.js

@@ -0,0 +1,24 @@
+'use strict'
+
+// Internal Symbols
+const kAvvio = Symbol('avvio.Boot')
+const kThenifyDoNotWrap = Symbol('avvio.ThenifyDoNotWrap')
+const kUntrackNode = Symbol('avvio.TimeTree.untrackNode')
+const kTrackNode = Symbol('avvio.TimeTree.trackNode')
+const kGetParent = Symbol('avvio.TimeTree.getParent')
+const kGetNode = Symbol('avvio.TimeTree.getNode')
+const kAddNode = Symbol('avvio.TimeTree.addNode')
+
+// Public Symbols
+const kPluginMeta = Symbol.for('plugin-meta')
+
+module.exports = {
+  kAvvio,
+  kThenifyDoNotWrap,
+  kUntrackNode,
+  kTrackNode,
+  kGetParent,
+  kGetNode,
+  kAddNode,
+  kPluginMeta
+}

plugin.js

@@ -5,9 +5,7 @@ const EE = require('events').EventEmitter
 const inherits = require('util').inherits
 const debug = require('debug')('avvio')
 const { AVV_ERR_READY_TIMEOUT } = require('./lib/errors')
-
-// this symbol is assigned by fastify-plugin
-const kPluginMeta = Symbol.for('plugin-meta')
+const { kPluginMeta } = require('./lib/symbols')
 
 function getName (func, optsOrFunc) {
   // use explicit function metadata if set

time-tree.js

@@ -1,12 +1,13 @@
 'use strict'
 
 const archy = require('archy')
-
-const kUntrackNode = Symbol('avvio.TimeTree.untrackNode')
-const kTrackNode = Symbol('avvio.TimeTree.trackNode')
-const kGetParent = Symbol('avvio.TimeTree.getParent')
-const kGetNode = Symbol('avvio.TimeTree.getNode')
-const kAddNode = Symbol('avvio.TimeTree.addNode')
+const {
+  kUntrackNode,
+  kTrackNode,
+  kGetParent,
+  kGetNode,
+  kAddNode
+} = require('./lib/symbols')
 
 class TimeTree {
   constructor () {