programmatic gulp task

programmatic gulp task.js

gulp.task('programmatic-configs', function () {
    var foldernames = ['some', 'folder', 'names'];
    var tasks = foldernames.map(function (fname) {
        var taskname = fname + '-build';
        gulp.task(taskname, function (done) {
            SOME_CONFIG_NAME = fname;
            //sequence will run with alternate config...
            runSequence('build', done);
        });
        return taskname;
    });
    runSequence.apply({}, tasks);
});