linux-mod-manager/lmm/runners/steam.py

import abc
from pathlib import Path

from lmm.cmd import run_cmd_nonblocking
from lmm.runners.runner import Runner
from lmm.games.game import Game, ProtonGame


class SteamRuntime(abc.ABC):
    def get_run_script(self) -> Path:
        raise NotImplementedError()


class SteamSniperRuntime(SteamRuntime):
    library: Path

    def __init__(self, library: Path):
        self.library = library

    def get_run_script(self) -> Path:
        return (
            self.library
            / "steamapps"
            / "common"
            / "SteamLinuxRuntime_sniper"
            / "run-in-sniper"
        )


class SteamSoldierRuntime(SteamRuntime):
    library: Path

    def __init__(self, library: Path):
        self.library = library

    def get_run_script(self) -> Path:
        return (
            self.library
            / "steamapps"
            / "common"
            / "SteamLinuxRuntime_soldier"
            / "run-in-soldier"
        )


class SteamFlatpakAppIdRunner(Runner):
    def __init__(self):
        super().__init__("steam.flatpak")

    def run(self, game: Game):
        assert isinstance(game, ProtonGame)

        run_cmd_nonblocking(
            [
                "flatpak",
                "run",
                "com.valvesoftware.Steam",
                f"steam://launch/{game.appid}/",
            ]
        )


class SteamFlatpakProtonRunner(Runner):
    # Path to the Proton prefix
    compat_data: Path

    proton_version: str

    runtime: SteamRuntime

    game: str

    # Launchmode as passed to Proton.
    # "waitforexitandrun" | "run"
    launchmode: str

    def __init__(
        self,
        compat_data: Path,
        runtime: SteamRuntime,
        proton_version: str,
        game: str,
        launchmode: str = "waitforexitandrun",
    ):
        self.compat_data = compat_data
        self.runtime = runtime
        self.game = game
        self.proton_version = proton_version

        self.launchmode = launchmode

    @property
    def _steam_install_path(self) -> Path:
        return Path.home() / ".steam" / "steam"

    def _build_environ(self) -> list[str]:
        proton = self._proton_path
        return [
            f"--env=STEAM_COMPAT_CLIENT_INSTALL_PATH={self._steam_install_path}",
            f"--env=STEAM_COMPAT_DATA_PATH={self.compat_data}",
            # f"--env=WINEDLLPATH={proton}/files/lib64/wine:{proton}/files/lib/wine",
            # f"--env=WINEPREFIX={self.compat_data}/pfx",
            # f"--env=SteamGameId=1144200",
            # "--env=WINEDLLOVERRIDES=steam.exe=b"
            # f"--env=WINEDEBUG=-all",
        ]

    @property
    def _proton_path(self) -> Path:
        return (
            Path.home()
            / "data"
            / "Steam"
            / "compatibilitytools.d"
            / self.proton_version
        )

    def _build_launch_command(self) -> str:
        command = [
            str(self.runtime.get_run_script()),
            str(self._proton_path / "proton"),
            self.launchmode,
            f"'{self.game}'",
        ]
        commandline = " ".join(command)
        return commandline

    def run(self):
        run_cmd_shell(
            " ".join(
                [
                    "flatpak",
                    "run",
                    "--command=bash",
                    *self._build_environ(),
                    "com.valvesoftware.Steam",
                    "-c",
                    f'"{self._build_launch_command()}"',
                ]
            )
        )