main.py

import os
import subprocess
# The decky plugin module is located at decky-loader/plugin
# For easy intellisense checkout the decky-loader code repo
# and add the `decky-loader/plugin/imports` path to `python.analysis.extraPaths` in `.vscode/settings.json`
import decky

class Plugin:
    def __init__(self):
        self.backend_process = None

    async def _main(self):
        decky.logger.info("Hello World!")

        self.backend_process = subprocess.Popen(os.path.join(os.path.dirname(__file__), 'bin', 'backend'))
        decky.logger.info("Backend process started")

    async def _unload(self):
        decky.logger.info("Goodnight World!")
        if self.backend_process:
            self.backend_process.terminate()
            self.backend_process.wait()
            decky.logger.info("Backend process terminated")

    # Function called after `_unload` during uninstall, utilize this to clean up processes and other remnants of your
    # plugin that may remain on the system
    async def _uninstall(self):
        decky.logger.info("Goodbye World!")
        pass

    # Migrations that should be performed before entering `_main()`.
    async def _migration(self):
        decky.logger.info("Migrating")
        # Here's a migration example for logs:
        # - `~/.config/decky-template/template.log` will be migrated to `decky.decky_LOG_DIR/template.log`
        decky.migrate_logs(os.path.join(decky.DECKY_USER_HOME,
                                               ".config", "decky-template", "template.log"))
        # Here's a migration example for settings:
        # - `~/homebrew/settings/template.json` is migrated to `decky.decky_SETTINGS_DIR/template.json`
        # - `~/.config/decky-template/` all files and directories under this root are migrated to `decky.decky_SETTINGS_DIR/`
        decky.migrate_settings(
            os.path.join(decky.DECKY_HOME, "settings", "template.json"),
            os.path.join(decky.DECKY_USER_HOME, ".config", "decky-template"))
        # Here's a migration example for runtime data:
        # - `~/homebrew/template/` all files and directories under this root are migrated to `decky.decky_RUNTIME_DIR/`
        # - `~/.local/share/decky-template/` all files and directories under this root are migrated to `decky.decky_RUNTIME_DIR/`
        decky.migrate_runtime(
            os.path.join(decky.DECKY_HOME, "template"),
            os.path.join(decky.DECKY_USER_HOME, ".local", "share", "decky-template"))