gruntjs - Grunt Multitask configuration issues -

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i'm trying configure grunt file can run multiple tasks on multiple "themes". since i'm new whole grunt thing, i'm having problems configuration.

my example below start, i'd have global configs, , nest specific "theme" configurations within named "target". i'm not speed on syntax, issue, when run grunt powerful error warning: required config property "watch" missing? feel configs ok, problem lies registermultitask. ideas?

module.exports = function(grunt) {  // project configuration.  grunt.initconfig({      // metadata.     pkg: grunt.file.readjson('package.json'),     banner: '/*!\n' +         '* microsites v<%= pkg.version %>\n' +         '* copyright <%= grunt.template.today("yyyy") %> <%= pkg.author %>\n' +         '*/\n' +         '/* @package: <%= pkg.name %> */\n',     jquerycheck: 'if (!jquery) { throw new error(\"<%= pkg.name %> requires jquery\") }\n\n',     basepath: '../../www/wp-content/themes',      powerful: {         name:   'powerful theme',         path:   '<%= basepath %>/powerful',         less: {             development: {                 options: {                     dumplinenumbers: true                 },                 files: {                     '<%= powerful.path %>/static/css/project.css':  '<%= powerful.path %>/static/css/less/project.less',                     '<%= powerful.path %>/static/css/editor.css':   '<%= powerful.path %>/static/css/less/editor.less',                     '<%= powerful.path %>/static/css/login.css':    '<%= powerful.path %>/static/css/less/login.less'                 }             },             production: {                 options: {                     yuicompress: true                 },                 files: {                     '<%= powerful.path %>/static/css/project.css':  '<%= powerful.path %>/static/css/less/project.less',                     '<%= powerful.path %>/static/css/editor.css':   '<%= powerful.path %>/static/css/less/editor.less',                     '<%= powerful.path %>/static/css/login.css':    '<%= powerful.path %>/static/css/less/login.less'                 }             },             ie: {                 options: {                     yuicompress: true                 },                 files: {                     '<%= powerful.path %>/static/css/ie.css':       '<%= powerful.path %>/static/css/less/ie.less'                 }             }         },         watch: {             less: {                 files: ['<%= powerful.path %>/static/css/less/*.less'],                 tasks: ['less:development']             }         }     }, // end: powerful  });   // load plugin grunt.loadnpmtasks('grunt-contrib-less'); grunt.loadnpmtasks('grunt-contrib-watch'); grunt.loadnpmtasks('grunt-contrib-jshint'); grunt.loadnpmtasks('grunt-contrib-uglify'); grunt.loadnpmtasks('grunt-contrib-concat');  // load tasks //grunt.registertask('default', ['less']); grunt.registermultitask('powerful', 'do things', function(){     grunt.task.run(['watch']); }); };

tasks should go on first level of config, not within task config. powerful task isnt multitask doesnt need config block. configure tasks standard way:

grunt.initconfig({   less: {     /* config here */   },   watch: {     /* config here */   } });

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