Option to write source map to file

[donaldpipowitch]

It would be great if rework could write a source map not only to a comment, but optionally to a file. It could look something like this (just pseudo code):

// rework/index.js
Rework.prototype.toString = function(options){
  options = options || {};
  var result = stringify(this.obj, options);
  if (options.sourcemap && !options.sourcemapAsObject) {
    if(!options.sourcemapAsFile) {
      result = result.code + '\n' + sourcemapToComment(result.map);
    } else {
      // options.sourcemapAsFile could be a boolean so filePath will be dest file appended with ".map" or it could be a string with custom path
      var filePath = get file path from options.sourcemapAsFile;
      result = result.code + '\n' + sourcemapToFile(result.map, filePath);
    }
  }
  return result;
};

function sourcemapToFile(map, filePath) {
  var convertSourceMap = require('convert-source-map');
  fs.writeFilSync(filePath, convertSourceMap.fromObject(map));
  return '/*# sourceMappingURL=' + filePath + ' */';
}

[donaldpipowitch]

I just made a pull request to grunt-rework to show how this could work: jney/grunt-rework#14.

[txchen]

I like the idea. Can rework support this?