provide instruction for old node users

README.md

@@ -38,30 +38,19 @@ In Node
 
 I ported that proccess to node.
 
+```
+sfs.writeFileAsync
+sfs.stageAsync
+sfs.commitAsync
+sfs.revertAsync
+```
+
 ```js
-// default behavior is to concat (filename + '.' + 'new')
-var safeReplace = require('safe-replace').create({ new: 'new', bak: 'bak' });
+// default behavior is to concat (filename + '.' + rnd() + '.tmp')
+var safeReplace = require('safe-replace').create({ tmp: 'tmp', bak: 'bak' });
 
 var data = new Buffer('A priceless document');
-safeReplace.writeFile('keep.txt', data, 'ascii').then(function () {
-  fs.readdir('.', function (nodes) {
-    console.log('file system nodes', nodes);
-    // keep.txt
-    // keep.txt.bak
-  });
-});
-
-// let's say I wrote keep.txt.x7t7sq926.tmp with my own mechanism
-safeReplace.commit('keep.txt.x7t7sq926.tmp', 'keep.txt').then(function () {
-  fs.readdir('.', function (nodes) {
-    console.log('file system nodes', nodes);
-    // keep.txt
-    // keep.txt.bak
-  });
-});
-
-// let's say I want to revert the file from the '.bak'
-safeReplace.revert('keep.txt').then(function () {
+safeReplace.writeFileAsync('keep.txt', data, 'ascii').then(function () {
   fs.readdir('.', function (nodes) {
     console.log('file system nodes', nodes);
     // keep.txt
@@ -70,12 +59,28 @@ safeReplace.revert('keep.txt').then(function () {
 });
 
 // let's say I want to write a tmp file and not commit it... weird
-safeReplace.stage('keep.txt', data, 'ascii').then(function (tmpname) {
+safeReplace.stageAsync('keep.txt', data, 'ascii').then(function (tmpname) {
+  fs.readdir('.', function (nodes) {
+    console.log('file system nodes', nodes);
+    // keep.txt.ac71teh8mja.tmp
+  });
+});
+
+// let's say I wrote keep.txt.x7t7sq926.tmp with my own mechanism
+safeReplace.commitAsync('keep.txt.x7t7sq926.tmp', 'keep.txt').then(function () {
+  fs.readdir('.', function (nodes) {
+    console.log('file system nodes', nodes);
+    // keep.txt
+    // keep.txt.bak
+  });
+});
+
+// let's say I want to revert the file from the '.bak'
+safeReplace.revertAsync('keep.txt').then(function () {
   fs.readdir('.', function (nodes) {
     console.log('file system nodes', nodes);
     // keep.txt
     // keep.txt.bak
-    // keep.txt.ac71teh8mja.tmp
   });
 });
 ```

index.js

@@ -1,7 +1,25 @@
 'use strict';
 
-var PromiseA = require('bluebird').Promise;
-var fs = PromiseA.promisifyAll(require('fs'));
+var PromiseA;
+try {
+  PromiseA = require('bluebird');
+} catch(e) {
+  PromiseA = global.Promise;
+}
+
+var util = require('util');
+var promisify = util.promisify || PromiseA.promisify;
+if (!PromiseA || !promisify) {
+  throw new Error("DON'T PANIC. Everything is A-OK."
+    + " However, you're on a really old version of node. All you need to do is `npm install --save bluebird`"
+    + " (in your project directory, which is probably '" + require('path').dirname(require.main.filename) + "')"
+    + " and everything will work just fine.");
+}
+
+var fs = require('fs');
+var writeFileAsync = promisify(fs.writeFile);
+var unlinkAsync = promisify(fs.unlink);
+var renameAsync = promisify(fs.rename);
 var crypto = require('crypto');
 
 function noop() {
@@ -35,32 +53,32 @@ function create(options) {
   */
 
   var sfs = {
-    writeFile: function (filename, data, options) {
+    writeFileAsync: function (filename, data, options) {
       return sfs.stage(filename, data, options).then(function (tmpname) {
         //console.log(filename);
         return sfs.commit(tmpname, filename);
       });
     }
-  , stage: function (filename, data, options) {
+  , stageAsync: function (filename, data, options) {
       var tmpname = tmpnamefn(filename);
       //console.log(tmpname);
-      return fs.writeFileAsync(tmpname, data, options).then(function () {
+      return writeFileAsync(tmpname, data, options).then(function () {
         return tmpname;
       });
     }
-  , commit: function (tmpname, filename) {
+  , commitAsync: function (tmpname, filename) {
       var bakname = baknamefn(filename);
       // this may not exist
-      return fs.unlinkAsync(bakname).then(noop, noop).then(function () {
+      return unlinkAsync(bakname).then(noop, noop).then(function () {
         // this may not exist
         //console.log(namefn(filename), '->', bakname);
-        return fs.renameAsync(filename, bakname).then(function () {
+        return renameAsync(filename, bakname).then(function () {
           //console.log('created bak');
         }, noop);
       }).then(function () {
         // this must be successful
         //console.log(filename, '->', filename);
-        return fs.renameAsync(tmpname, filename).then(noop, function (err) {
+        return renameAsync(tmpname, filename).then(noop, function (err) {
           //console.error(err);
           return sfs.revert(filename).then(function () {
             return PromiseA.reject(err);
@@ -68,7 +86,7 @@ function create(options) {
         });
       });
     }
-  , revert: function (filename) {
+  , revertAsync: function (filename) {
       return new PromiseA(function (resolve, reject) {
         var bakname = baknamefn(filename);
         var tmpname = tmpnamefn(filename);
@@ -89,6 +107,10 @@ function create(options) {
   , baknamefn: baknamefn
   , create: create
   };
+  sfs.writeFile = sfs.writeFileAsync;
+  sfs.stage = sfs.stageAsync;
+  sfs.commit = sfs.commitAsync;
+  sfs.revert = sfs.revertAsync;
 
   return sfs;
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "safe-replace",
-  "version": "1.0.1",
+  "version": "1.1.0",
   "description": "A micro-module for safely replacing a file.",
   "main": "index.js",
   "scripts": {
@@ -8,7 +8,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/coolaj86/node-safe-replace.git"
+    "url": "https://git.coolaj86.com/coolaj86/fs-safe-replace.js.git"
   },
   "keywords": [
     "cluster",
@@ -23,7 +23,7 @@
   "author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
   "license": "(MIT OR Apache-2.0)",
   "bugs": {
-    "url": "https://github.com/coolaj86/node-safe-replace/issues"
+    "url": "https://git.coolaj86.com/coolaj86/fs-safe-replace.js/issues"
   },
-  "homepage": "https://github.com/coolaj86/node-safe-replace#readme"
+  "homepage": "https://git.coolaj86.com/coolaj86/fs-safe-replace.jse"
 }