launcher/main.py

import json
from pathlib import Path
from subprocess import PIPE, STDOUT, Popen

import webview

config_path = Path("launcher.json")

try:
    with config_path.open("r") as f:
        config = json.load(f)
except Exception:
    config = {
        "page": "init",
        "branch": "slow",
    }


def custom_event(name, data):
    data = json.dumps({name: data})
    js = f"var event = new CustomEvent('log', {{detail: {data}}}); window.dispatchEvent(event);"
    window.evaluate_js(js)


class Api:
    def get_branch(self):
        return config["branch"]

    def set_branch(self, branch):
        config["branch"] = branch

    def get_page(self):
        return config["page"]

    def set_page(self, page):
        config["page"] = page

    def run(self, command, cwd=None):
        with Popen(
            command,
            stdout=PIPE,
            stderr=STDOUT,
            shell=True,
            bufsize=1,
            text=True,
            cwd=cwd,
        ) as p:
            for line in p.stdout:
                custom_event("log", line)


window = webview.create_window("mower-ng launcher", "dist/index.html", js_api=Api())
webview.start()

with config_path.open("w") as f:
    json.dump(config, f)