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Task not found error while using Grunt task runner

I am on a Windows machine and I believe I have installed everything I need to run the grunt task:
grunt sass
I have already executed the following commands in my terminal:
npm install grunt-sass --save-dev
npm install time-grunt --save-dev
npm install jit-grunt --save-dev
npm install grunt-contrib-watch --save-dev
npm install grunt-browser-sync --save-dev
I am getting the following error:
Warning: Task "sass" not found. Use --force to continue.
Aborted due to warnings.
I have tried every possible solution from other similar posts but to no avail. My Gruntfile.js is as follows:
"use strict";
module.exports = function (grunt) {
require("time-grunt")(grunt);
require("jit-grunt");
grunt.initConfig({
sass: {
dist: {
files: {
"css/styles.css": "css/styles.scss"
}
}
},
watch: {
files: "css/*.scss",
tasks: ["sass"]
},
browserSync: {
dev: {
bsFiles: {
src: [
"css/*.css",
"*.html",
"js/*.js"
]
},
options: {
watchTask: true,
server: {
baseDir: "./"
}
}
}
}
});
grunt.registerTask("css", ["sass"]);
grunt.registerTask("default", ["browserSync", "watch"]);
};

I have managed to find the solution. Make the following changes to the file:
"use strict";
module.exports = function (grunt) {
const sass = require('node-sass'); // add this line
require("time-grunt")(grunt);
require("jit-grunt")(grunt);
grunt.initConfig({
sass: {
dist: {
files: {
"css/styles.css": "css/styles.scss"
}
}
},
watch: {
files: "css/*.scss",
tasks: ["sass"]
},
browserSync: {
dev: {
bsFiles: {
src: [
"css/*.css",
"*.html",
"js/*.js"
]
},
options: {
implementation: sass, //add this line
sourceMap: true, //add this line
watchTask: true,
server: {
baseDir: "./"
}
}
}
}
});
grunt.registerTask("css", ["sass"]);
grunt.registerTask("default", ["browserSync", "watch"]);
};

Grunt no "qunit" targets found

Configuring grunt to make automated JS tests with jenkins and qunit, I am actually blocking on this issue.
When I run grunt:
Running "qunit_junit" task
XML reports will be written to _build/test-reports
No "qunit" targets found.
Warning: Task "qunit" failed. Use --force to continue.
Aborted due to warnings.
My Gruntfile:
'use strict';
module.exports = function(grunt) {
var gruntConfig = {};
grunt.initConfig({
sync: {
target: {}
}
});
grunt.registerTask('default', ['qunit_junit', 'qunit']);
grunt.loadNpmTasks('grunt-contrib-qunit');
grunt.loadNpmTasks('grunt-qunit-istanbul');
gruntConfig.qunit = {
src: ['static/test/index.html'],
options: {
coverage: {
src: ['static/js/**/*.js'],
instrumentedFiles: 'temp/',
htmlReport: 'report/coverage',
coberturaReport: 'report/',
linesThresholdPct: 20
}
}
};
grunt.loadNpmTasks('grunt-qunit-junit');
gruntConfig.qunit_junit = {
options: {
dest: 'report/'
}
};
};
I checked and console.log() in the node_modules, the grunt-contrib-qunit is installed and the task is in it so grunt finds the module and the task but seems not to load it.

Just at a glance - you are creating your config, but not doing anything with it.
Change this line
grunt.initConfig({
sync: {
target: {}
}
});
to this:
grunt.initConfig(gruntConfig);
You might also want to move that down below all the other stuff you add to gruntConfig.

Grunt concats JS file multiple times

I'm working on a Node.js website and I'm using Grunt to concat and minify my CSS and JS files. However, after running the grunt command I'm getting the error message:
fullPage: Fullpage.js can only be initialized once and you are doing it multiple times!
Here's my grunt file:
/*global module */
module.exports = function (grunt) {
"use strict";
grunt.initConfig({
// read in the project settings from the package.json file into the pkg property
pkg: grunt.file.readJSON("package.json"),
// Install only the bower packages that we need
bower: {
install: {
options: {
"targetDir": "./public/lib",
"copy": true,
"cleanup": true,
"install": true
}
}
},
concat: {
css: {
src: ["public/lib/css/**/*.css", "public/css/cts.css"],
dest: "public/lib/dist/main.css"
},
js: {
src: ["public/lib/**/jquery.js", "public/lib/**/*.js", "public/js/cts.js"],
dest: "public/lib/dist/main.js"
}
},
cssmin: {
target: {
files: {
"public/lib/dist/main.min.css": "public/lib/dist/main.css"
}
}
},
uglify : {
js: {
files: {
"public/lib/dist/main.min.js": "public/lib/dist/main.js"
}
}
},
copy: {
files: {
expand: true,
flatten: true,
src: ["public/lib/fonts/**/*"],
dest: "public/lib/fonts/",
filter: "isFile"
}
}
});
// Add all plugins that your project needs here
grunt.loadNpmTasks("grunt-bower-task");
grunt.loadNpmTasks("grunt-contrib-concat");
grunt.loadNpmTasks("grunt-contrib-copy");
grunt.loadNpmTasks("grunt-contrib-cssmin");
grunt.loadNpmTasks("grunt-contrib-uglify");
grunt.loadNpmTasks("grunt-contrib-watch");
// this would be run by typing "grunt test" on the command line
// the array should contains the names of the tasks to run
grunt.registerTask("test", []);
// define the default task that can be run just by typing "grunt" on the command line
// the array should contains the names of the tasks to run
grunt.registerTask("default", [ "bower", "concat", "cssmin", "uglify", "copy"]);
grunt.registerInitTask("install", ["bower"]);
};
If anything I would have thought jQuery would be the one that's getting concatenated multiple times but it's not. Any suggestions what I might be doing wrong?
EDIT: Here's my upgraded grunt file with all 3rd party libraries listed in the concat.src.
/// <binding BeforeBuild='default' />
/*global module */
module.exports = function (grunt) {
"use strict";
grunt.initConfig({
// read in the project settings from the package.json file into the pkg property
pkg: grunt.file.readJSON("package.json"),
// Install only the bower packages that we need
bower: {
install: {
options: {
"targetDir": "./public/lib",
"copy": true,
"cleanup": true,
"install": true
}
}
},
concat: {
css: {
src: ["public/lib/css/**/*.css", "public/css/cts.css"],
dest: "public/lib/dist/main.css"
},
js: {
src: [
"public/lib/js/jquery/jquery.js",
"public/lib/js/bootstrap/bootstrap.js",
"public/lib/js/fullpage.js/jquery.fullpage.js",
"public/lib/js/jquery-easing-original/jquery.easing.js",
"public/lib/js/slimscroll/jquery.slimscroll.js",
"public/lib/js/wow/wow.js",
"public/js/cts.js"
],
dest: "public/lib/dist/main.js"
}
},
cssmin: {
target: {
files: {
"public/lib/dist/main.min.css": "public/lib/dist/main.css"
}
}
},
uglify : {
js: {
files: {
"public/lib/dist/main.min.js": "public/lib/dist/main.js"
}
}
},
copy: {
files: {
expand: true,
flatten: true,
src: ["public/lib/fonts/**/*"],
dest: "public/lib/fonts/",
filter: "isFile"
}
}
});
// Add all plugins that your project needs here
grunt.loadNpmTasks("grunt-bower-task");
grunt.loadNpmTasks("grunt-contrib-concat");
grunt.loadNpmTasks("grunt-contrib-copy");
grunt.loadNpmTasks("grunt-contrib-cssmin");
grunt.loadNpmTasks("grunt-contrib-uglify");
grunt.loadNpmTasks("grunt-contrib-watch");
// this would be run by typing "grunt test" on the command line
// the array should contains the names of the tasks to run
grunt.registerTask("test", []);
// define the default task that can be run just by typing "grunt" on the command line
// the array should contains the names of the tasks to run
grunt.registerTask("default", [ "bower", "concat", "cssmin", "uglify", "copy"]);
grunt.registerTask("combine", [ "concat", "cssmin", "uglify", "copy"]);
grunt.registerInitTask("install", ["bower"]);
};

Your issue seems to be in concate.js.src
src: ["public/lib/**/jquery.js", "public/lib/**/*.js", "public/js/cts.js"]
This will have your files added multiple times as there might some files common among the paths mentioned in src.
You should probably move all your vendor files like jquery out of the public directory and put in a different one, say vendor.
Your src should then look something like
src: ["vendor/**/*.js", "public/**/*.js"]
As you see now there are no common files among these two paths.
Also its a good practice to always have 3rd party code outside your app directory as a sibling folder and not inside it.
EDIT:
Ah! I see whats your problem. You want to have jquery first among the other vendor files.
public/lib/**/jquery.js and public/lib/**/*.js together might be causing files added twice.
Try this
src: ["public/lib/jquery/jquery.js", "public/lib/**/*.js", "!public/lib/jquery/jquery.js", public/js/cts.js"]
Put the full path of jquery first public/lib/jquery/jquery.js and then the !public/lib/jquery/jquery.js should prevent jquery being added again as part of public/lib/**/*.js
Got the above pattern from here http://gruntjs.com/configuring-tasks#globbing-patterns
If this still doesn't work, then another option is to add all paths in the src array individually. If you have a requirejs config just copy the paths from there, as jquery might not be the only dependency issue you face in future.

aurelia-bundler gulp.js can't be found

This is the content of my gulpfile.js:
var gulp = require('gulp');
var bundler = require('aurelia-bundler');
var config = {
force: true,
packagePath: '.',
bundles: {
"dist/app-build": {
includes: [
'Main.js',
],
excludes:[
"gulpfile.js",
],
options: {
inject: true,
minify: true
}
},
"dist/aurelia": {
includes: [
'aurelia-bootstrapper',
'aurelia-fetch-client',
'aurelia-router',
'aurelia-animator-css',
'github:aurelia/templating-binding',
'github:aurelia/templating-resources',
'github:aurelia/templating-router',
'github:aurelia/loader-default',
'github:aurelia/history-browser',
'github:aurelia/logging-console'
],
options: {
inject: true,
minify: true
}
}
}
};
gulp.task('bundle', function() {
console.log("ok");
return bundler.bundle(config);
});
When I run gulp bundle the following error occurs:
[08:08:54] 'bundle' errored after 536 ms [08:08:54] Error on fetch for
gulp.js at file:///C:/myapp/gulp.js
Loading gulpfile.js
Error: ENOENT: no such file or directory, open 'C:\myapp\gulp.js'
at Error (native)
I wounder why he is searching for gulp.js in the root Directory of the project and not inside the node_modules folder?

The first thing this file does is attempt to require 'gulp' - have you done an npm install first?

Finally I got the problem solved by deleting the node_modules folder and running npm install again

issue in testing with gruntjs and phantomjs

I want to create a Gruntfile.js to run bunch of phantomjs tests, when I execute > grunt run-test from commandline, it runs a bunch of tests. I created a Gruntfile.js and package.json which works ok and it reads bunch of tests from a directory. Now my problem is that when I write a phantomjs test and run the "grunt", it gives me this error:
Error: Cannot find module 'system'
Error: Cannot find module 'phantom'
However phantomjs is installed before by using npm install phantomjs
Example of phantomtest which gives me the above error:
var system = require('system');
if (system.args.length === 1) {
console.log('Try to pass some args when invoking this script!');
} else {
system.args.forEach(function (arg, i) {
console.log(i + ': ' + arg);
});
}
phantom.exit();
When I run phantomjs test1 (name of the test file) it runs the test so I think maybe I should append "phantomjs" somewhere in the Gruntfile. Any idea?
Gruntfile.js
'use strict';
module.exports = function(grunt) {
// Project configuration.
grunt.initConfig({
jshint: {
all: [
'Gruntfile.js',
'tests/*.js',
'<%= nodeunit.tests %>',
],
options: {
jshintrc: '.jshintrc',
},
},
// Before generating any new files, remove any previously-created files.
clean: {
tests: ['tmp'],
},
// Configuration to be run (and then tested).
testArgs: {
configFile:"test/testConf.js",
options: {
args: {
params: {
number: 1,
bool: true,
str: "string",
nil: null, // Null is not supported.
obj: {
array: [1, 2, 3],
undef: undefined
}
},
capabilities: {
'browserName': 'chrome'
},
rootElement:"body",
specs:["test/argsTest.js"],
verbose:true
}
}
},
testDebug: {
configFile:"test/testConf.js",
options: {
debug:true,
args: {
specs:["test/debugTest.js"],
}
}
},
// Unit tests.
nodeunit: {
tests: ['tests/*_test.js'],
},
});
// Actually load this plugin's task(s).
grunt.loadTasks('tests');
// These plugins provide necessary tasks.
grunt.loadNpmTasks('grunt-contrib-jshint');
grunt.loadNpmTasks('grunt-contrib-clean');
grunt.loadNpmTasks('grunt-contrib-nodeunit');
// Whenever the "test" task is run, first clean the "tmp" dir, then run this
// plugin's task(s), then test the result.
grunt.registerTask('test', ['clean']);
// By default, lint and run all tests.
grunt.registerTask('default', ['jshint', 'test']);
};