Allow using fuse-overlayfs instead of mount

lmm/cli.py

@@ -1,6 +1,7 @@
 import os
 from typing import Optional
 
+from lmm.config import LMMConfig
 from lmm.const import LMM_GAMES_PATH
 from lmm.games.config import load_game_configs
 from lmm.games.game import Game
@@ -148,6 +149,7 @@ def list():
 
 
 def main():
+    LMMConfig.init()
     cli()
 
 

lmm/config.py

@@ -0,0 +1,24 @@
+from lmm.const import LMM_PATH
+
+import yaml
+
+
+class LMMConfig:
+    use_fuse: bool
+    overlayfs_command: str
+    fusermount_command: str
+
+    @classmethod
+    def init(cls):
+        # Load the config file
+        config = LMM_PATH / "config.yaml"
+        if config.exists():
+            with open(config, "r") as f:
+                data = yaml.load(f, Loader=yaml.CLoader)
+        else:
+            data = {}
+
+        fuse = data.get("fuse", {})
+        cls.use_fuse = fuse.get("enable", False)
+        cls.overlayfs_command = fuse.get("overlayfs", "fuse-overlayfs")
+        cls.fusermount_command = fuse.get("fusermount", "fusermount")

lmm/games/game.py

@@ -115,11 +115,21 @@ class ProtonGame(Game, abc.ABC):
                     with open(proc_path, "r") as f:
                         cmdline = f.read()
 
+                    # Workaround for Baldur's Gate 3, which launches "../bin/bg3_dx11.exe", when launched from
+                    # the Larion Launcher.
+                    if cmdline.startswith(".."):
+                        cmdline = os.path.join(
+                            os.readlink(proc / dir / "cwd"), cmdline
+                        ).replace("\\", "/")
+
                     # Workaround for games like Baldur's Gate 3 that have a relative path in the cmdline.
                     # Note that the cmdline contains null bytes that we have to remove.
                     abs_cmdline = os.path.abspath(cmdline).replace("\x00", "")
-                    if cmdline.startswith(wine_exe_path) or abs_cmdline == str(
+
-                        self.game_executable
+                    if (
+                        cmdline.startswith(wine_exe_path)
+                        or abs_cmdline == str(self.game_executable)
+                        or abs_cmdline.startswith(str(self.game_executable))
                     ):
                         self._pid = dir
                         break

lmm/overlayfs.py

@@ -2,7 +2,8 @@ from pathlib import Path
 import tempfile
 from typing import Optional
 
-from lmm.cmd import run_sudo_cmd
+from lmm.config import LMMConfig
+from lmm.cmd import run_sudo_cmd, run_cmd
 
 
 def compute_workdirs_location(mount: Path) -> Path:
@@ -71,6 +72,17 @@ class OverlayFSMount:
             workdir = self.create_workdir()
             options += f",upperdir={self.upper},workdir={workdir}"
 
+        if LMMConfig.use_fuse:
+            result = run_cmd(
+                [
+                    LMMConfig.overlayfs_command,
+                    "-o",
+                    options,
+                    str(self.mount_path),
+                ],
+                cd=self.cd,
+            )
+        else:
             result = run_sudo_cmd(
                 [
                     "mount",
@@ -95,6 +107,15 @@ class OverlayFSMount:
             print("Unmounting...")
 
             # Remove the mount
+            if LMMConfig.use_fuse:
+                run_cmd(
+                    [
+                        LMMConfig.fusermount_command,
+                        "-u",
+                        str(self.mount_path),
+                    ]
+                )
+            else:
                 run_sudo_cmd(
                     [
                         "umount",