Last few tweaks

README.md

@@ -15,7 +15,8 @@ var convert = obj2gltf.convert;
 var options = {
     embedImage : false // Don't embed image in the converted glTF
 }
-convert('model.obj', 'model.gltf', options, function() {
+convert('model.obj', 'model.gltf', options)
+    .then(function() {
         console.log('Converted model');
     });
 ```

lib/convert.js

@@ -37,7 +37,7 @@ function convert(objFile, outputPath, options) {
     extension = binary ? '.glb' : '.gltf';
     var gltfFile = path.join(outputPath, modelName + extension);
 
-    parseObj(objFile, inputPath)
+    return parseObj(objFile, inputPath)
         .then(function(data) {
             return createGltf(data, inputPath, modelName);
         })

lib/obj.js

@@ -2,7 +2,6 @@
 
 var Cesium = require('cesium');
 var Promise = require('bluebird');
-var async = require('async');
 var byline = require('byline');
 var fs = require('fs-extra');
 var path = require('path');
@@ -28,7 +27,8 @@ function parseObj(objFile, inputPath) {
         });
 }
 
-function processObj(objFile, info, materials, images, done) {
+function processObj(objFile, info, materials, images) {
+    return new Promise(function(resolve) {
         // A vertex is specified by indexes into each of the attribute arrays,
         // but these indexes may be different. This maps the separate indexes to a single index.
         var vertexCache = {};
@@ -232,7 +232,7 @@ function processObj(objFile, info, materials, images, done) {
         });
 
         stream.on('end', function () {
-        done({
+            resolve({
                 vertexCount: vertexCount,
                 vertexArray: vertexArray,
                 positionMin: positionMin,
@@ -244,6 +244,7 @@ function processObj(objFile, info, materials, images, done) {
                 images: images
             });
         });
+    });
 }
 
 function getImages(inputPath, materials) {

specs/lib/convertSpec.js

@@ -10,7 +10,7 @@ var gltfFile = './specs/data/BoxTextured/BoxTextured.gltf';
 
 describe('convert', function() {
     it('converts an obj to gltf', function(done) {
-        var spy = spyOn(gltfPipeline, 'processJSONToDisk').and.callFake(function() {
+        var spy = spyOn(gltfPipeline, 'processJSONToDisk').and.callFake(function(gltf, outputPath, options, callback) {
             return;
         });
         expect(convert(objFile, gltfFile, {})