C.B.
Set the child down and have a good strong talk with her. If she's excited about going to kindergarten then she should be excited about being a big girl and using the potty like all the other kids. This is what I had to do with my one son. Can't go to school if he can't learn to use the toilet. Worked for me.
And I suggest sticking to it until the kid gets so bored staying at home that she'll get the idea. Meanwhile be prepared to homeschool. And if she insists on acting like a baby and wear diapers, she should be treated accordingly. She'll get tired of taking naps with "I'm too big to take naps". Give her a bottle and not a sippy cup or glass, because she's a baby. Sometimes it takes embarassing them into growing up.