Couldn't find generate_urdf.py and nao_robot.xacro files

[sprakashdash]

For my project (in RL) I wanted to build up a urdf file. But I am pretty beginner in this stuff. So I was looking at the stuff in humanoid data folder. I found the main urdf file which is described as it was auto generated from generate_urdf.py and nao_robot.xacro, but I could not find these file in the repo after a search. A link to these files would be immensely appreciated!