grunt-requirejs-config/tasks/index.js

grunt task to prepend a require.js config to a file

var fs = require('fs');
var prettyStringify = require('js-object-pretty-print').pretty;

module.exports = function (grunt) {
  'use strict';

  grunt.registerMultiTask('requirejsconfig', 'Prepends a require.js config file.', function () {

    var options = this.options();
    var done = this.async();

    if (fs.existsSync(this.data.src)) {
      var configContents = fs.readFileSync(this.data.src, 'utf8');
      fs.writeFileSync(this.data.dest, '// Config added by grunt-requirejs-config\n');
      fs.appendFileSync(this.data.dest, 'require.config(' + prettyStringify(options, 2, 'JSON', true) + ');\n');
      fs.appendFileSync(this.data.dest, configContents);
      grunt.log.ok('Require.js config created at: ' + this.data.dest);
      done();
    } else {
      grunt.log.error('No source file found at: ' + this.data.src);
      done();
    }
  });
};