Hem & Less

slug.js

var hem     = new (require('hem'));
var less    = require('less');
var fs      = require('fs');
var argv    = process.argv.slice(2);
var path    = require('path');
var util    = require('util');

hem.compilers.less = function (pathname) {
  var content, result;
  content = fs.readFileSync(pathname, 'utf8');
  result = '';
  less.render(content, { paths: [path.dirname(pathname)] }, function(err, css) {
    if (err) { throw err; }
    result = css;
  });
  return result;
};

require.extensions['.less'] = function(module, filename) {
  var source;
  source = JSON.stringify(hem.compilers.less(filename));
  return module._compile("module.exports = " + source, filename);
};

// Monkey patch importer of LESS to load files synchronously
less.Parser.importer = function (file, paths, callback) {
  var pathname, data;

  paths.unshift('.');

  for (var i = 0; i < paths.length; i++) {
    try {
      pathname = path.join(paths[i], file);
      fs.statSync(pathname);
      break;
    } catch (e) {
      pathname = null;
    }
  }

  if (!pathname) {
    util.error("file '" + file + "' wasn't found.\n");
    process.exit(1);
  }

  try {
    data = fs.readFileSync(pathname, 'utf-8');
  } catch (e) {
    util.error(e);
  }

  new(less.Parser)({
    paths: [path.dirname(pathname)].concat(paths),
    filename: pathname
  }).parse(data, function (e, root) {
    if (e) less.writeError(e);
    callback(root);
  });
}

hem.exec(argv[0]);