[squash] cleanup: make ProcessTree instances nodes of the tree themse…

…lves

This is in preparation for per-subtree coverage at some point.

index.js

@@ -446,9 +446,7 @@ NYC.prototype.report = function () {
 }
 
 NYC.prototype.showProcessTree = function () {
-  var processInfos = this._loadProcessInfos()
-
-  console.log(ProcessInfo.renderProcessTree(processInfos))
+  console.log(this._loadProcessInfoTree().render())
 }
 
 NYC.prototype.checkCoverage = function (thresholds) {
@@ -475,6 +473,10 @@ NYC.prototype.checkCoverage = function (thresholds) {
   })
 }
 
+NYC.prototype._loadProcessInfoTree = function () {
+  return ProcessInfo.buildProcessTree(this._loadProcessInfos())
+}
+
 NYC.prototype._loadProcessInfos = function () {
   var _this = this
   var files = fs.readdirSync(this.processInfoDirectory())

lib/process.js

@@ -12,14 +12,25 @@ function ProcessInfo (defaults) {
   this.ppid = null
   this.root = null
   this.coverageFilename = null
+  this.nodes = [] // list of children, filled by buildProcessTree()
 
   for (var key in defaults) {
     this[key] = defaults[key]
   }
 }
 
-ProcessInfo.renderProcessTree = function (infos) {
-  var treeRoot = { label: 'nyc', nodes: [] }
+Object.defineProperty(ProcessInfo.prototype, 'label', {
+  get: function () {
+    if (this._label) {
+      return this._label
+    }
+
+    return this.argv.join(' ')
+  }
+})
+
+ProcessInfo.buildProcessTree = function (infos) {
+  var treeRoot = new ProcessInfo({ _label: 'nyc' })
   var nodes = { }
 
   infos = infos.sort(function (a, b) {
@@ -28,8 +39,6 @@ ProcessInfo.renderProcessTree = function (infos) {
 
   infos.forEach(function (p) {
     nodes[p.root + ':' + p.pid] = p
-    p.nodes = [] // list of children
-    p.label = p.argv.join(' ')
   })
 
   infos.forEach(function (p) {
@@ -45,7 +54,11 @@ ProcessInfo.renderProcessTree = function (infos) {
     parent.nodes.push(p)
   })
 
-  return archy(treeRoot)
+  return treeRoot
+}
+
+ProcessInfo.prototype.render = function () {
+  return archy(this)
 }
 
 module.exports = ProcessInfo