grunt

Gruntfile.js

module.exports = function(grunt) {
 
  var target = grunt.option('target') || 'dev';
  var watch_tasks = ['concat:js'];
  if(target != 'dev') watch_tasks.push('uglify:js');

  grunt.registerTask('watch', [ 'watch' ]); 
 
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    concat: {
      js: {
        options: {
        },
        src: [
          'app/*.js',
          'app/**/*.js'
        ],
        dest: 'app.min.js'
      },
    },
    uglify: {
      options: {
        banner: '/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n',
        mangle: false
      },
      js: {
        files: {
          'app.min.js': ['app.min.js']
        }
      }
    },
    less: {
      style: {
        files: {
          'public/css/style.css': 'less/style.less'
        }
      }
    },
    watch: {
      html: {
        files: ['templates/*.html', '../../../app/views/layouts/ng.html.erb', '../../../app/views/ng/*', '../../../app/assets/stylesheets/ng.css.scss'],
        options: {
          livereload: true,
        }
      },
      js: {
        files: ['*.js'],
        tasks: watch_tasks,
        options: {
          livereload: true,
        }
      },
      css: {
        files: ['less/*.less'],
        tasks: ['less:style'],
        options: {
          livereload: true,
        }
      }
    }
  });
 
  

  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-less');
  grunt.loadNpmTasks('grunt-contrib-watch');


 
};