old_contents: var fs = require('fs')
    , gulp = require('gulp')
    , concat = require('gulp-concat')
    , rename = require('gulp-rename')
    , uglify = require('gulp-uglify');
  
  gulp.task('requirejs', function () {
    gulp.src('./client/assets/lib/requirejs/require.js')
      .pipe(rename('require.min.js'))
      .pipe(uglify())
      .pipe(gulp.dest('./client/assets/lib/requirejs/'));
  });
  
  gulp.task('config', function () {
    if (!fs.existsSync('./server/config/config.js')) {
      gulp.src('./server/config/config.default.js')
        .pipe(rename('config.js'))
        .pipe(gulp.dest('./server/config/'));
    }
  });
  
  gulp.task('default', function () {
    gulp.run('requirejs');
  });
  
new_contents: var fs = require('fs')
    , gulp = require('gulp')
    , concat = require('gulp-concat')
    , rename = require('gulp-rename')
    , uglify = require('gulp-uglify');
  
  gulp.task('requirejs', function () {
    gulp.src('./client/assets/lib/requirejs/require.js')
      .pipe(rename('require.min.js'))
      .pipe(uglify())
      .pipe(gulp.dest('./client/assets/lib/requirejs/'));
  });
  
  gulp.task('config', function () {
    if (!fs.existsSync('./server/config/config.js')) {
      gulp.src('./server/config/config.default.js')
        .pipe(rename('config.js'))
        .pipe(gulp.dest('./server/config/'));
    }
  });
  
  gulp.task('default', function () {
    gulp.run('requirejs', 'config');
  });
  
subject: fix error in gulpfile.js -- need to run "config" task by default