Fix bugs in dev commands and organize the dev script (#5099)

bin/dev

@@ -1,30 +1,43 @@
 #!/usr/bin/env node
 
-var nodemon = require('nodemon');
+const args = process.argv;
-var babel = require("babel-core");
+const babel = require("@babel/core");
-var gaze = require('gaze'); 
+const fs = require('fs');
-var fs = require('fs');
+const gaze = require('gaze');
-var path = require('path');
+const nodemon = require('nodemon');
+const path = require('path');
 
 // Watch the src and transpile when changed
-gaze('src/**/*', function(err, watcher) {
+gaze('src/**/*', (err, watcher) => {
-  if (err) throw err;
+  if (err) {
-  watcher.on('changed', function(sourceFile) {
+    throw err;
+  }
+  watcher.on('changed', sourceFile => {
     console.log(sourceFile + " has changed");
     try {
-      targetFile = path.relative(__dirname, sourceFile).replace(/\/src\//, '/lib/');
+      let targetFile = path.relative(__dirname, sourceFile).replace(/\/src\//, '/lib/');
       targetFile = path.resolve(__dirname, targetFile);
-      fs.writeFile(targetFile, babel.transformFileSync(sourceFile).code);
+      fs.writeFile(
+        targetFile,
+        babel.transformFileSync(sourceFile).code,
+        () => {
+          console.log('Re-running the parse-server...')
+        },
+      );
     } catch (e) {
       console.error(e.message, e.stack);
     }
   });
 });
 
+// ignore command and file
+args.splice(0, 2);
+
 try {
   // Run and watch dist
   nodemon({
     script: 'bin/parse-server',
+    args: args,
     ext: 'js json',
     watch: 'lib'
   });
@@ -32,6 +45,6 @@ try {
   console.error(e.message, e.stack);
 }
 
-process.once('SIGINT', function() {
+process.once('SIGINT', () => {
-    process.exit(0);
+  process.exit(0);
 });