gruntjs - How can I make Grunt.js imagemin to track *any* folder and possibly store images in one place? -

i'm relatively new grunt.js, setting quiet easy, have 2 issues: 1) first, how track any folder inside given sources folder? example, images folder may contain images, folders images , folders folders images etc. 2) there way watch images in it's primary (build) folder? without forever loop...

here's current config:

module.exports = function(grunt) { grunt.initconfig({     jsdir: 'sources/js/',     jsdistdir: 'public/js/',     cssdir: 'sources/css/',     cssdistdir: 'public/css/',     concat: {         js: {             src: ['<%=jsdir%>*.js'],             dest: '<%=jsdistdir%>javascript.js'         },         css: {             src: ['<%=cssdir%>*.css'],             dest: '<%=cssdistdir%>styles.css'         }     },     min: {         dist: {             src: ['<%= concat.js.dest %>'],             dest: '<%=jsdistdir%>javascript.js'         }     },     cssmin: {         dist: {             src: ['<%= concat.css.dest %>'],             dest: '<%=cssdistdir%>styles.css'         }     },     imagemin: {         dynamic: {             files: [{                 expand: true,                 cwd: 'sources/images/',                 src: ['**/*.{png,jpg,gif}'],                 dest: 'public/images/'             }]         }     },     watch: {         min: {             files: ['<%=jsdir%>*.js'],             tasks: ['concat:js', 'min']         },         cssmin: {             files: ['<%=cssdir%>*.css'],             tasks: ['concat:css', 'cssmin']         },         imagemin: {             files: ['sources/images/**/*.{png,jpg,gif}'],             tasks: ['imagemin']         }     } });  grunt.loadnpmtasks('grunt-contrib-concat'); grunt.loadnpmtasks('grunt-yui-compressor'); grunt.loadnpmtasks('grunt-contrib-imagemin'); grunt.loadnpmtasks('grunt-contrib-watch');  grunt.registertask('default', [     'concat',     'min',     'cssmin',     'imagemin',     'watch' ]); }; 

thanks!

question 1):

the expression **/* this. (see imagemin > dynamic > files > src). inside concat section src: ['<%=jsdir%>**/*.js'],

question 2): use a watch task:

install: npm install grunt-contrib-watch --save-dev

(--save-dev means write dependency package.json file)

configuration in gruntfile.js:

(function () {     'use strict'; }());  module.exports = function(grunt) {     require('load-grunt-tasks')(grunt);  // auto load grunt tasks     var globalconfig = {         jspath: 'js/',         csspath: 'css/',         scsspath: 'scss/',     };      grunt.initconfig({         globalconfig: globalconfig,         pkg: grunt.file.readjson('package.json'),          concat: {             // conf goes here         },         // other tasks go here         imagemin: {             // conf goes here         },          watch: {             dev:{                 files: ['<%= globalconfig.jspath %>_*.js', '<%= globalconfig.scsspath %>**/*.scss'],                 tasks: ['concat','imagemin', 'yourothertasks']             }         }     });      grunt.registertask('default', ['concat', 'imagemin', 'yourothertasks', 'watch:dev']); };