Add node 4 compatibility

Author: opsb

bin/style-elements.js

@@ -6,15 +6,17 @@ var program = require("commander");
 var fs = require("fs");
 var chalk = require("chalk");
 var requiredOptions = ["stylesheetModule", "stylesheetFunction", "output"];
-var { writeFile, assertKeysPresent } = require("../js/utils");
+var utils = require("../js/utils");
+var writeFile = utils.writeFile;
+var assertKeysPresent = utils.assertKeysPresent;
 
-var { output, stylesheetModule, stylesheetFunction } = getOptions(
-  process.argv,
-  program
-);
+var options = getOptions(process.argv, program);
 
-styleElements({ stylesheetModule, stylesheetFunction })
-  .then(result => writeFile(output, result))
+styleElements({
+  stylesheetModule: options.stylesheetModule,
+  stylesheetFunction: options.stylesheetFunction
+})
+  .then(result => writeFile(options.output, result))
   .then(() => {
     console.warn(
       chalk.green(`\n----> Success! styles were written to ${program.output}\n`)

index.js

@@ -1,11 +1,11 @@
 var path = require("path");
 var compileElm = require("node-elm-compiler").compile;
-var {
-  unindent,
-  writeFile,
-  withTmpDir,
-  assertKeysPresent
-} = require("./js/utils.js");
+var utils = require("./js/utils.js");
+
+var unindent = utils.unindent;
+var writeFile = utils.writeFile;
+var withTmpDir = utils.withTmpDir;
+var assertKeysPresent = utils.assertKeysPresent;
 
 var requiredOptions = ["stylesheetModule", "stylesheetFunction"];
 

js/utils.js

@@ -15,9 +15,9 @@ module.exports = {
       : text;
   },
 
-  writeFile: function(...args) {
+  writeFile: function(path, content) {
     return new Promise((resolve, reject) => {
-      return fs.writeFile(...args, err => (err ? reject(err) : resolve()));
+      return fs.writeFile(path, content, err => (err ? reject(err) : resolve()));
     });
   },
 
@@ -33,11 +33,11 @@ module.exports = {
     });
   },
 
-  assertKeysPresent: function(object = {}, requiredKeys, missingCallback) {
-    var providedKeys = Object.keys(object);
+  assertKeysPresent: function(object, requiredKeys, missingCallback) {
+    var providedKeys = Object.keys(object || {});
     var missingKeys = requiredKeys.filter(key => {
       return (
-        !providedKeys.includes(key) || providedKeys[key] === ""
+        providedKeys.indexOf(key) === -1 || providedKeys[key] === ""
       );
     });