Run lein cljsbuild auto with Grunt

Gruntfile.coffee

module.exports = (grunt) ->
  require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks)

  grunt.initConfig {
    app:
      dev: "app"
    watch:
      sass:
        files: ['<%= app.dev %>/**/*.scss']
        tasks: ['compass:dist']
    compass:
      dist:
        options:
          config: 'config/compass.rb'
    express:
      server:
        options:
          bases: require('path').resolve("./<%= app.dev %>")
    concurrent:
      default:
        tasks: [ 'server', 'longrunning:cljs', 'watch' ]
        options:
          limit: 3
          logConcurrentOutput: true
    longrunning:
      cljs:
        commands: [
          { options: { cmd: "lein", args: [ "cljsbuild", "auto" ] } }
        ]
  }
  
  grunt.registerTask 'server', [ 'express:server', 'express-keepalive' ]
  grunt.registerTask 'default', [ 'concurrent:default' ]

package.json

{
  "name": "my-clojurescript-project",
  "version": "0.0.0",
  "devDependencies": {
    "grunt": "~0.4.1",
    "grunt-contrib-watch": "~0.4.0",
    "grunt-contrib-compass": "~0.5.0",
    "grunt-express": "~1.2.1",
    "grunt-concurrent": "~0.4.3",
    "matchdep": "~0.1.2",
    "grunt-longrunning": "0.0.0"
  },
  "engines": {
    "node": ">=0.8.0"
  },
}