Added compatibility to bundlers (closes #144 #152 #153) #154 (#163)

* feat: added bundling compatibility

* chore: 3.0.1 changelog

* fix: use methods for require to prepare gwmi

Co-authored-by: tabarra <tabarra@vexguard.net>

CHANGELOG.md

@@ -1,3 +1,8 @@
+### 3.0.1
+
+- removed dynamic requires to allow for bundling #154
+- add ibm platform (os400) #158
+
 ### 3.0
 
 - removes node 8 support

lib/stats.js

@@ -3,6 +3,12 @@
 const fs = require('fs')
 const os = require('os')
 
+const requireMap = {
+  ps: () => require('./ps'),
+  procfile: () => require('./procfile'),
+  wmic: () => require('./wmic')
+}
+
 const platformToMethod = {
   aix: 'ps',
   os400: 'ps',
@@ -18,7 +24,6 @@ const platformToMethod = {
   win: 'wmic'
 }
 
-const ps = require('./ps')
 let platform = os.platform()
 
 if (fs.existsSync('/etc/alpine-release')) {
@@ -31,7 +36,7 @@ if (platform.match(/^win/)) {
 
 let stat
 try {
-  stat = require('./' + platformToMethod[platform])
+  stat = requireMap[platformToMethod[platform]]()
 } catch (err) {}
 
 /**
@@ -50,10 +55,10 @@ try {
 function get (pids, options, callback) {
   let fn = stat
   if (platform !== 'win' && options.usePs === true) {
-    fn = ps
+    fn = requireMap.ps()
   }
 
-  if (stat === undefined) {
+  if (fn === undefined) {
     return callback(new Error(os.platform() + ' is not supported yet, please open an issue (https://github.com/soyuka/pidusage)'))
   }