Grunt.js install bower components and force the latest version, great if you're running the rc version of angular.js

Gruntfile.js

/*
  grunt task that calls bower install with --force-latest
  simply call 'bower' from a registerTask.

  grunt.registerTask('install', [
    'clean',
    'bower',
    'bower_postinst' // good grunt plugin if you want to build something from sources, in my case I'm building angular-bootstraps 3.0.0 branch
  ]);
*/

// place this above your grunt.initConfig({...})
grunt.registerTask('bower', 'Install js packages listed in bower.json', function () {
  var done = this.async();
  var bower = require('bower');
  var cli = require('bower/lib/util/cli');

  var cmd = bower.commands.install.line(['--force-latest']);
  var renderer = cli.getRenderer('--force-latest', cmd.json, bower.config);

  cmd
    .on('log', function(log){
        renderer.log(log);
    })
    .on('end', function(data) {
      renderer.end(data);
      done();
    })
    .on('error', function(err) {
      renderer.error(err);
      done();
    });
});