Angular and Grunt

Question

I'm a Grunt newbie and I'm trying to convert an Angular app (based on angular-seed) to use it for CSS/JS concat/minification. I have an index.html file that defines the CSS and JS files:

<!-- build:css css/myjmh.css -->
<link rel="stylesheet" href="lib/bootstrap/bootstrap.min.css"/>
<link rel="stylesheet" href="lib/font-awesome/font-awesome.min.css"/>
<link rel="stylesheet" href="lib/toaster/toaster.css"/>
<link rel="stylesheet" href="css/app.css"/>
<link rel="stylesheet" href="css/custom.css"/>
<link rel="stylesheet" href="css/responsive.css"/>
<!-- endbuild -->

...

<!-- build:js js/myjmh.min.js -->
<script src="lib/jquery/jquery-1.10.2.min.js"></script>
<script src="lib/bootstrap/bootstrap.min.js"></script>
<script src="lib/angular/angular.min.js"></script>
<script src="lib/angular/angular-animate.min.js"></script>
<script src="lib/angular/angular-cookies.min.js"></script>
<script src="lib/angular/angular-resource.min.js"></script>
<script src="lib/angular/angular-route.min.js"></script>
<script src="lib/fastclick.min.js"></script>
<script src="lib/toaster/toaster.js"></script>
<script src="lib/webshim/modernizr.min.js"></script>
<script src="lib/webshim/polyfiller.min.js"></script>
<script src="js/app.js"></script>
<script src="js/services.js"></script>
<script src="js/controllers.js"></script>
<script src="js/filters.js"></script>
<script src="js/directives.js"></script>
<!-- endbuild -->

I'm trying to use grunt-usemin and its useminPrepare task to grab these values from my HTML.

Here's my Gruntfile.js:

module.exports = function (grunt) {

    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),

        clean: ["dist"],

        copy: {
            main: {
                src: 'app/index.html',
                dest: 'dist/index.html'
            }
        },

        useminPrepare: {
            html: 'app/index.html'
        },

        usemin: {
            html: ['dist/index.html']
        },

        ngmin: {
            dist: {
                files: [
                    {
                        expand: true,
                        cwd: '.tmp/concat/js',
                        src: '*.js',
                        dest: '.tmp/concat/js'
                    }
                ]
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-copy');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-cssmin');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-ngmin');
    grunt.loadNpmTasks('grunt-usemin');
    grunt.loadNpmTasks('grunt-contrib-watch');

    grunt.registerTask('default', [
        'copy', 'useminPrepare', 'concat', 'ngmin', 'uglify', 'cssmin', 'usemin'
    ]);
};

With all these settings, a "dist" directory is created with all the artifacts and everything seems to be generated/concatenated and minified correctly. However, when I load the new page up in my browser, I get the following error:

Uncaught Error: [$injector:unpr] http://errors.angularjs.org/1.2.3/$injector/unpr?p0=aProvider%20%3C-%20a 

It seems like Grunt is doing something that doesn't play well with Angular. Any ideas on what this might be?

Answer 1

I was able to solve this by turning off mangling in uglify:

    uglify: {
        options: {
            report: 'min',
            mangle: false
        }
    }

As you might notice from my Gruntfile.js, ngmin is already used and this doesn't seem to help.

Found answer here: https://stackoverflow.com/a/17239358/65681