Task for copying JavaScript Source Map files from vendor (and bower_components) to dist directory.

GruntFixSourceMappingTask.js

grunt.registerTask('fixSourceMapping', function () {
  var concat = grunt.config('concat'),
      copy = grunt.config('copy'),
      files = concat.generated.files,
      i, src, sourceMapFiles = [];

  for (i in files) {
    if (files[i].dest === "dist/scripts/vendor.js") {
      src = files[i].src;
      break;
    }
  }

  for (i in src) {
    var file1 = src[i].replace(/.js/, '.map');
    var file2 = src[i] + '.map';
    if (grunt.file.exists(file1)) {
      file1 = file1.replace(/client\//, '');
      sourceMapFiles.push(file1);
    }
    if (grunt.file.exists(file2)) {
      file2 = file2.replace(/client\//, '');
      sourceMapFiles.push(file2);
    }
  }

  copy.dist.files.push({
    expand: true,
    flatten: true,
    cwd: "client",
    dest: "dist/scripts",
    src: sourceMapFiles,
    filter: 'isFile'
  });

  grunt.config('copy', copy);
  grunt.log.ok();
});