Gruntfile with concurrent execution, concat, uglify, cssmin, coffee,less, htmlmin

gistfile1.txt

module.exports = function(grunt){
	grunt.initConfig({
		coffee: {
			compile: {

				options: {
					bare: true,
					sourceMap:true
				},
				files: {
					'public/js/landing.js': 'coffee/landing.coffee', // 1:1 compile
				}
			},
		},
		less: {
			dev: {
				options: {
					paths: ["less"],
					compress: true,
					yuicompress:true,
					optimization: 2,
					sourceMap: true,
					sourceMapFilename: 'public/css/maincss.map',
					sourceMapURL:'maincss.map',
					sourceMapBasepath:'public',
					sourceMapRootpath: '/'
				},
				files: [{"public/css/main.css": "less/main.less"},
					{"public/css/admin.css": "less/admin.less"}]
			}
		},
		concat: {
			mainjs:{
				src:[
					"public/js/vendor/prefixfree.min.js",
					"public/js/vendor/modernizr.js",
					"public/js/vendor/jquery.min.js",
					"public/js/vendor/d3.min.js"],
					dest:"public/js/vendor.min.js"
			},


		},
		concurrent: {
	        target: {
	             tasks: ['concat','less'],
	             options: {
	                 logConcurrentOutput: true
	             }
	        },
	        target2: {
	             tasks: ['uglify','cssmin'],
	             options: {
	                 logConcurrentOutput: true
	             }
	        }
	     },
		cssmin: {
			options: {
				shorthandCompacting: false,
				roundingPrecision: -1,
				sourceMap:true
			},
			target: {
				files: {
					'public/css/main.min.css': ['public/css/main.css'],
					'public/css/vendor/vendor.min.css':[

						//"bower_components/roboto-slab-fontface/roboto-slab-fontface.css",
						//"bower_components/roboto-fontface/css/roboto-fontface.css",
						//"public/css/vendor/RobotoCondensed.css",
					],

						'public/css/admin.min.css': ['public/css/admin.css'],
				}

			}
		},
		watch: {

			styles: {
				files: ['less/*.less'],
				tasks: ['less','concat:maincss','cssmin'],
				options: {
					nospawn: true
				}
			},
			js: {
				files: ['public/js/*.js'],
				tasks: ['concat:mainjs','uglify'],
			}
		},
		uglify: {
			options: {
				mangle: {
					except: ['jQuery']
				},
				sourceMap:'main.min.map'
			},
			js: {
				files: {
					"public/js/main.min.js":["public/js/vendor.min.js","public/src/main.js"],
				
				}
			}
		},
	});
	grunt.loadNpmTasks('grunt-concurrent');
	grunt.loadNpmTasks('grunt-contrib-htmlmin');
	grunt.loadNpmTasks('grunt-contrib-concat');
	grunt.loadNpmTasks('grunt-contrib-watch');
	grunt.loadNpmTasks('grunt-contrib-uglify');
	grunt.loadNpmTasks('grunt-contrib-cssmin');
	grunt.loadNpmTasks('grunt-contrib-less');
	grunt.loadNpmTasks('grunt-contrib-coffee');
	grunt.registerTask('default',['coffee','concurrent:target','concurrent:target2']);

};