From 20f7efd8447b50436c3704befe93d76252e8c898 Mon Sep 17 00:00:00 2001
From: PhilNehaev <philipp.nehaev@gmail.com>
Date: Sun, 2 Jun 2013 19:24:39 +0400
Subject: [PATCH] After callback, passing mapping object

---
 Gruntfile.js              |  8 ++++++++
 tasks/rev.js              | 11 +++++++++--
 test/fixtures/mapping.txt |  0
 test/rev_test.js          |  8 ++++++++
 4 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 test/fixtures/mapping.txt

diff --git a/Gruntfile.js b/Gruntfile.js
index a9e2b22..32bc55c 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -56,6 +56,14 @@ module.exports = function(grunt) {
         },
         src: ['tmp/international.txt']
       },
+      mapping: {
+        options: {
+          after: function (mapping, options) {
+            grunt.file.write('tmp/mapping.json', JSON.stringify(mapping));
+          }
+        },
+        src: ['tmp/mapping.txt', 'tmp/international.txt']
+      },
     },
 
     // Unit tests.
diff --git a/tasks/rev.js b/tasks/rev.js
index f6f77c2..81652e0 100644
--- a/tasks/rev.js
+++ b/tasks/rev.js
@@ -13,6 +13,7 @@ var fs = require('fs'),
   crypto = require('crypto');
 
 module.exports = function(grunt) {
+  var _ = grunt.util._;
 
   function md5(filepath, algorithm, encoding, fileEncoding) {
     var hash = crypto.createHash(algorithm);
@@ -27,7 +28,8 @@ module.exports = function(grunt) {
       encoding: 'utf8',
       algorithm: 'md5',
       length: 8
-    });
+    }),
+    mapping = {};
 
     this.files.forEach(function(filePair) {
       filePair.src.forEach(function(f) {
@@ -35,13 +37,18 @@ module.exports = function(grunt) {
         var hash = md5(f, options.algorithm, 'hex', options.encoding),
           prefix = hash.slice(0, options.length),
           renamed = [prefix, path.basename(f)].join('.'),
-          outPath = path.resolve(path.dirname(f), renamed);
+          outPath = path.join(path.dirname(f), renamed);
 
+        mapping[f] = outPath;
         grunt.verbose.ok().ok(hash);
         fs.renameSync(f, outPath);
         grunt.log.write(f + ' ').ok(renamed);
 
       });
+
+      if (_.isFunction(options.after)) {
+        options.after(mapping, options);
+      }
     });
 
   });
diff --git a/test/fixtures/mapping.txt b/test/fixtures/mapping.txt
new file mode 100644
index 0000000..e69de29
diff --git a/test/rev_test.js b/test/rev_test.js
index b876642..ee7c7fc 100644
--- a/test/rev_test.js
+++ b/test/rev_test.js
@@ -49,6 +49,14 @@ exports.rev = {
     var exists = grunt.file.exists('tmp/faa07745.international.txt');
     test.ok(exists, '8 character MD5 hash prefix for international content');
 
+    test.done();
+  },
+  mapping: function(test) {
+    test.expect(1);
+
+    var raw = grunt.file.read('tmp/mapping.json');
+    test.equal(raw, '{"tmp/mapping.txt":"tmp/d41d8cd9.mapping.txt"}');
+
     test.done();
   }
 };