[wpilib] Pregenerate PWM motor controllers

[pjreiniger]

Fixes #6739

[TheTripleV]

Consider using pathlib instead of wrangling names manually. The trailing backslash vs no trailing backslash can bite someone who tries to update it in the future.

Do explicitly set utf-8 as the encoding on file operations in case someone tries to run this on Windows. Python on Windows will switch to utf-8 by default (ignoring locale) in 2026.

gpt conversion doing both for example

```py #!/usr/bin/env python3 # Copyright (c) FIRST and other WPILib contributors. # Open Source Software; you can modify and/or share it under the terms of # the WPILib BSD license file in the root directory of this project. import argparse import json import sys from pathlib import Path from jinja2 import Environment, FileSystemLoader def render_template(template, output_dir, filename, controller): output_dir_path = Path(output_dir) output_dir_path.mkdir(parents=True, exist_ok=True) (output_dir_path / filename).write_text(template.render(controller), encoding="utf-8") def generate_pwm_motor_controllers(output_root, template_root): template_root_path = Path(template_root) with (template_root_path / "pwm_motor_controllers.json").open(encoding="utf-8") as f: controllers = json.load(f) env = Environment( loader=FileSystemLoader(str(template_root_path)), autoescape=False, keep_trailing_newline=True, ) root_path = Path(output_root) / "main/java/edu/wpi/first/wpilibj/motorcontrol" template = env.get_template("pwm_motor_controller.java.jinja") for controller in controllers: controller_name = f"{controller['name']}.java" render_template(template, root_path, controller_name, controller) def main(argv): script_path = Path(__file__).resolve() dirname = script_path.parent parser = argparse.ArgumentParser() parser.add_argument( "--output_directory", help="Optional. If set, will output the generated files to this directory, otherwise it will use a path relative to the script", default=dirname / "src/generated", ) parser.add_argument( "--template_root", help="Optional. If set, will use this directory as the root for the jinja templates", default=dirname / "src/generate", ) args = parser.parse_args(argv) generate_pwm_motor_controllers(args.output_directory, args.template_root) if __name__ == "__main__": main(sys.argv[1:]) ```