grunt uglify task failing

Question

When running grunt, I get the following error:

Warning: Unable to write \"client/dist/js/build.js\" file (Error code: undefined). Use --force to conti

Answer 1

Assuming your Grunt Version is 0.4.0, AFAIK you are not using the most recent Syntax (See https://github.com/gruntjs/grunt-contrib-uglify#usage-examples).

Try

uglify: {
    build: {
        files: {
            'client/dist/js/build.js': ['client/src/js/*.js']
        }
    }
}

I am also not sure if the wildcards are handled properly.