Reading Grunt config from custom functions in Gruntfile.js for further use in config

gistfile1.js

/*

    Usefull snippent for this kind of custom Grunt functions https://gist.github.com/operatino/bd857f570adaf2872c37

*/

module.exports = function (grunt) {

    var baseConfig = {
            foo: 'bar'
        };
    grunt.initConfig(baseConfig);
    
    var someFunc = function(){
        var foo = grunt.config.get('foo');
    };
    
    grunt.config.merge({
        task: {
            some: [
                '<%= foo %>',
            ]
        },
        
        otherTask: {
            some: someFunc()
        }
    });
    
};