Playing around with Grunt tasks. This is a simple cache buster that revisions given files with md5 hash and also updates the corresponding file references in index.html.

gistfile1.txt

// Simple cache buster that revisions src files with hash and replaces the new filepaths in index.html
  grunt.registerMultiTask('cachebuster', function() {
    var indexSrc = grunt.file.read(".tmp/index.html");

    this.filesSrc.forEach(function(file) {
      var src = grunt.file.read(file);
      var hash = crypto.createHash('md5').update(src).digest("hex");
      var ext = path.extname(file);
      var basename = path.basename(file, ext);

      var newName = basename + "." + hash + ext;

      var newPath = path.join(path.dirname(file), newName);

      fs.writeFileSync(newPath, src);

      var d = path.dirname(file);
      var r = path.relative(".tmp", d);
      newName = path.join(r, newName);
      var oldName = path.join(r, basename + ext);

      indexSrc = indexSrc.replace('"' + oldName + '"', '"' + newName + '"');
    });

    fs.writeFileSync(".tmp/index.html", indexSrc);
  });