proton

#!/usr/bin/env python3

#script to launch Wine with the correct environment

import fcntl
import array
import fnmatch
import os
import re
import shutil
import errno
import platform
import resource
import stat
import subprocess
import sys
import shlex
import uuid
import json
import time

from ctypes import CDLL
from ctypes import CFUNCTYPE
from ctypes import POINTER
from ctypes import Structure
from ctypes import addressof
from ctypes import cast
from ctypes import get_errno
from ctypes import sizeof
from ctypes import c_int
from ctypes import c_int64
from ctypes import c_uint
from ctypes import c_long
from ctypes import c_char_p
from ctypes import c_void_p
from ctypes import c_size_t
from ctypes import c_ssize_t

from filelock import FileLock
from random import randrange
from pathlib import Path

import protonfixes

#To enable debug logging, copy "user_settings.sample.py" to "user_settings.py"
#and edit it if needed.
import utilities

CURRENT_PREFIX_VERSION="GE-Proton11-5"

PFX="Proton: "
ld_path_var = "LD_LIBRARY_PATH"

# https://bugs.kde.org/show_bug.cgi?id=524702
# Ark can omit empty directory entries when extracting Proton tarballs. Keep
# fresh prefixes valid even when their extracted default_pfx lost Wine's shell
# directory skeleton.
STANDARD_PREFIX_DIRECTORIES = (
    "drive_c/ProgramData/Microsoft/Windows/Start Menu/Programs/Administrative Tools",
    "drive_c/ProgramData/Microsoft/Windows/Start Menu/Programs/StartUp",
    "drive_c/ProgramData/Microsoft/Windows/Templates",
    "drive_c/users/Public/Desktop",
    "drive_c/users/Public/Documents",
    "drive_c/users/Public/Music",
    "drive_c/users/Public/Pictures",
    "drive_c/users/Public/Videos",
    "drive_c/users/steamuser/AppData/Local/Microsoft/Windows/History",
    "drive_c/users/steamuser/AppData/Local/Microsoft/Windows/INetCache",
    "drive_c/users/steamuser/AppData/Local/Microsoft/Windows/INetCookies",
    "drive_c/users/steamuser/AppData/Local/Temp",
    "drive_c/users/steamuser/AppData/LocalLow",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/AccountPictures",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Network Shortcuts",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Printer Shortcuts",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Recent",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/SendTo",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Administrative Tools",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/StartUp",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Templates",
    "drive_c/users/steamuser/AppData/Roaming/Microsoft/Windows/Themes",
    "drive_c/users/steamuser/Contacts",
    "drive_c/users/steamuser/Desktop",
    "drive_c/users/steamuser/Documents/Downloads",
    "drive_c/users/steamuser/Documents/Music",
    "drive_c/users/steamuser/Documents/Pictures",
    "drive_c/users/steamuser/Documents/Templates",
    "drive_c/users/steamuser/Documents/Videos",
    "drive_c/users/steamuser/Downloads",
    "drive_c/users/steamuser/Favorites",
    "drive_c/users/steamuser/Links",
    "drive_c/users/steamuser/Music",
    "drive_c/users/steamuser/Pictures/Screenshots",
    "drive_c/users/steamuser/Saved Games",
    "drive_c/users/steamuser/Searches",
    "drive_c/users/steamuser/Videos",
)

proton_config = set()
if "PROTON_ADD_CONFIG" in os.environ:
    try:
        config = os.environ["PROTON_ADD_CONFIG"].split(',')
        for c in config:
            proton_config.add(c)
    except:
        pass

def empty_directory(path):
    # Walk through the directory structure top-down (False)
    for root, dirs, files in os.walk(path, topdown=False):
        # Remove files and symlinks to files
        for name in files:
            item_path = os.path.join(root, name)
            if os.path.islink(item_path):
                os.remove(item_path) # Remove symlink
            else:
                os.remove(item_path) # Remove file
        # Remove directories and symlinks to directories
        for name in dirs:
            item_path = os.path.join(root, name)
            if os.path.islink(item_path):
                os.remove(item_path) # Remove symlink
            else:
                os.rmdir(item_path) # Remove directory

# If -steamdeck mode is enabled, try to copy existing game prefixes to steamdeck's prefix location -- this helps to preserve mods and saves across systems
# Note: this completely wipes the existing destination prefix and copies the source prefix over instead.

# source = game partition, destination = steamdeck prefix location
# From game partition to steamdeck (steamdeck enabled)
if os.getenv("SteamDeck") == "1" and os.getenv("COPYPREFIX") == "1":
    # Get the value of the STEAM_COMPAT_INSTALL_PATH environment variable
    steam_compat_install_path = os.getenv('STEAM_COMPAT_INSTALL_PATH')

    # Navigate up two directories
    parent_directory = Path(steam_compat_install_path).parents[1]

    # Check if the "compatdata/<steam game>" folder exists and is not empty
    compatdata_path = parent_directory / "compatdata" / str(os.environ.get("SteamAppId", 0))
    if compatdata_path.exists() and os.listdir(compatdata_path):
        # Define the destination directory
        steamdeck_compatdata = Path(os.environ["STEAM_BASE_FOLDER"]) / "steamapps" / "compatdata" / str(os.environ.get("SteamAppId", 0))

        # Remove destination if it already exists:
        if os.path.isdir(steamdeck_compatdata) and os.listdir(steamdeck_compatdata):
            empty_directory(steamdeck_compatdata)

        # Copy the "compatdata/<steam game>" folder to the destination directory
        # Use dirs_exist_ok=True to avoid FileExistsError if the destination directory already exists
        shutil.copytree(compatdata_path, steamdeck_compatdata, dirs_exist_ok=True, symlinks=True)

    # Check if the "shadercache/<steam game>" folder exists and is not empty
    shadercache_path = parent_directory / "shadercache" / str(os.environ.get("SteamAppId", 0))

    if shadercache_path.exists() and os.listdir(shadercache_path):
        # Define the destination directory
        steamdeck_shadercache = Path(os.environ["STEAM_BASE_FOLDER"]) / "steamapps" / "shadercache" / str(os.environ.get("SteamAppId", 0))

        # Remove destination if it already exists:
        if os.path.isdir(steamdeck_shadercache) and os.listdir(steamdeck_shadercache):
            empty_directory(steamdeck_shadercache)

        # Copy the "shadercache/<steam game>" folder to the destination directory
        # Use dirs_exist_ok=True to avoid FileExistsError if the destination directory already exists
        shutil.copytree(shadercache_path, steamdeck_shadercache, dirs_exist_ok=True, symlinks=True)

# source = steamdeck prefix location, destination = game partition
# From steamdeck to game partition (steamdeck disabled)
if os.getenv("SteamDeck") == "0" or "SteamDeck" not in os.environ:
    if os.getenv("COPYPREFIX") == "1":
        # Get the value of the STEAM_COMPAT_INSTALL_PATH environment variable
        steam_compat_install_path = os.getenv('STEAM_COMPAT_INSTALL_PATH')

        # Navigate up two directories
        parent_directory = Path(steam_compat_install_path).parents[1]

        # Check if the "compatdata/<steam game>" folder exists and is not empty
        steamdeck_compatdata = Path(os.environ["STEAM_BASE_FOLDER"]) / "steamapps" / "compatdata" / str(os.environ.get("SteamAppId", 0))
        if os.path.isdir(steamdeck_compatdata) and os.listdir(steamdeck_compatdata):
            # Define the destination directory
            compatdata_path = parent_directory / "compatdata" / str(os.environ.get("SteamAppId", 0))

            # Remove destination if it already exists:
            if os.path.isdir(compatdata_path) and os.listdir(compatdata_path):
                empty_directory(compatdata_path)

            # Copy the steamdeck_compatdata to the compatdata_path
            # Use dirs_exist_ok=True to avoid FileExistsError if the destination directory already exists
            shutil.copytree(steamdeck_compatdata, compatdata_path, dirs_exist_ok=True, symlinks=True)

        # Similar logic for shadercache
        steamdeck_shadercache = Path(os.environ["STEAM_BASE_FOLDER"]) / "steamapps" / "shadercache" / str(os.environ.get("SteamAppId", 0))

        if os.path.isdir(steamdeck_shadercache) and os.listdir(steamdeck_shadercache):
            # Define the destination directory
            shadercache_path = parent_directory / "shadercache" / str(os.environ.get("SteamAppId", 0))

            # Remove destination if it already exists:
            if os.path.isdir(shadercache_path) and os.listdir(shadercache_path):
                empty_directory(shadercache_path)

            # Copy the steamdeck_shadercache to the shadercache_path
            # Use dirs_exist_ok=True to avoid FileExistsError if the destination directory already exists
            shutil.copytree(steamdeck_shadercache, shadercache_path, dirs_exist_ok=True, symlinks=True)

def file_exists(s, *, follow_symlinks):
    if follow_symlinks:
        #'exists' returns False on broken symlinks
        return os.path.exists(s)
    #'lexists' returns True on broken symlinks
    return os.path.lexists(s)

def nonzero(s):
    return len(s) > 0 and s != "0"

def prepend_to_env_str(env, variable, prepend_str, separator):
    if variable not in env:
        env[variable] = prepend_str
    else:
        env[variable] = prepend_str + separator + env[variable]

def append_to_env_str(env, variable, append_str, separator):
    if variable not in env:
        env[variable] = append_str
    else:
        env[variable] = env[variable] + separator + append_str

def log(msg):
    try:
        sys.stderr.write(PFX + msg + os.linesep)
        sys.stderr.flush()
    except OSError:
        # e.g. see https://github.com/ValveSoftware/Proton/issues/6277
        # There's not much we can usefully do about this: printing a
        # warning to stderr isn't going to work any better the second time
        pass

def file_is_wine_builtin_dll(path):
    if os.path.islink(path):
        contents = os.readlink(path)
        if os.path.dirname(contents).endswith((
                    '/lib/wine/i386-unix',
                    '/lib/wine/i386-windows',
                    '/lib/wine/x86_64-unix',
                    '/lib/wine/x86_64-windows',
                    '/lib/wine/aarch64-unix',
                    '/lib/wine/aarch64-windows',
                    # old paths
                    '/lib/wine',
                    '/lib/wine/fakedlls',
                    '/lib64/wine',
                    '/lib64/wine/fakedlls',
                    '/lib64/wine/x86_64-unix',
                    '/lib64/wine/x86_64-windows'
                )):
            # This may be a broken link to a dll in a removed Proton install
            return True
    if not file_exists(path, follow_symlinks=True):
        return False
    try:
        sfile = open(path, "rb")
        sfile.seek(0x40)
        tag = sfile.read(20)
        return tag.startswith((b"Wine placeholder DLL", b"Wine builtin DLL"))
    except IOError:
        return False

def makedirs(path):
    try:
        #replace broken symlinks with a new directory
        if os.path.islink(path) and not file_exists(path, follow_symlinks=True):
            os.remove(path)
        os.makedirs(path)
    except OSError:
        #already exists
        pass

def merge_user_dir(src, dst):
    extant_dirs = []
    for src_dir, dirs, files in os.walk(src):
        dst_dir = src_dir.replace(src, dst, 1)

        #as described below, avoid merging game save subdirs, too
        child_of_extant_dir = False
        for dir_ in extant_dirs:
            if dir_ in dst_dir:
                child_of_extant_dir = True
                break
        if child_of_extant_dir:
            continue

        #we only want to copy into directories which don't already exist. games
        #may not react well to two save directory instances being merged.
        if not file_exists(dst_dir, follow_symlinks=True) or os.path.samefile(dst_dir, dst):
            makedirs(dst_dir)
            for dir_ in dirs:
                src_file = os.path.join(src_dir, dir_)
                dst_file = os.path.join(dst_dir, dir_)
                if os.path.islink(src_file) and not file_exists(dst_file, follow_symlinks=True):
                    try_copy(src_file, dst_file, copy_metadata=True, follow_symlinks=False)
            for file_ in files:
                src_file = os.path.join(src_dir, file_)
                dst_file = os.path.join(dst_dir, file_)
                if not file_exists(dst_file, follow_symlinks=True):
                    try_copy(src_file, dst_file, copy_metadata=True, follow_symlinks=False)
        else:
            extant_dirs += dst_dir

def try_copy(src, dst, prefix=None, add_write_perm=True, copy_metadata=False, optional=False,
             follow_symlinks=True, track_file=None, link_debug=False):
    try:
        if prefix is not None:
            dst = os.path.join(prefix, dst)

        if os.path.isdir(dst):
            dst = os.path.join(dst, os.path.basename(src))

        if file_exists(dst, follow_symlinks=False):
            os.remove(dst)
        elif track_file and prefix is not None:
            track_file.write(os.path.relpath(dst, prefix) + '\n')

        if os.path.islink(src) and not follow_symlinks:
            shutil.copyfile(src, dst, follow_symlinks=False)
        else:
            copyfile(src, dst)

        if copy_metadata:
            shutil.copystat(src, dst, follow_symlinks=follow_symlinks)
        else:
            shutil.copymode(src, dst, follow_symlinks=follow_symlinks)

        if add_write_perm:
            new_mode = os.lstat(dst).st_mode | stat.S_IWUSR | stat.S_IWGRP
            os.chmod(dst, new_mode)

        if not file_exists(src + '.debug', follow_symlinks=True):
            link_debug = False

        if file_exists(dst + '.debug', follow_symlinks=False):
            os.remove(dst + '.debug')
        elif link_debug and track_file:
            track_file.write(os.path.relpath(dst + '.debug', prefix) + '\n')

        if link_debug:
            os.symlink(src + '.debug', dst + '.debug')

    except FileNotFoundError as e:
        if optional:
            log('Error while copying to \"' + dst + '\": ' + e.strerror)
        else:
            raise

    except PermissionError as e:
        if e.errno == errno.EPERM:
            #be forgiving about permissions errors; if it's a real problem, things will explode later anyway
            log('Error while copying to \"' + dst + '\": ' + e.strerror)
        else:
            raise

# copy_file_range implementation for old Python versions
__syscall__copy_file_range = None

def copy_file_range_ctypes(fd_in, fd_out, count):
    "Copy data using the copy_file_range syscall through ctypes, assuming x86_64 Linux"
    global __syscall__copy_file_range
    __NR_copy_file_range = 326

    if __syscall__copy_file_range is None:
        c_int64_p = POINTER(c_int64)
        prototype = CFUNCTYPE(c_ssize_t, c_long, c_int, c_int64_p,
            c_int, c_int64_p, c_size_t, c_uint, use_errno=True)
        __syscall__copy_file_range = prototype(('syscall', CDLL(None, use_errno=True)))

    while True:
        ret = __syscall__copy_file_range(__NR_copy_file_range, fd_in, None, fd_out, None, count, 0)
        if ret >= 0 or get_errno() != errno.EINTR:
            break

    if ret < 0:
        raise OSError(get_errno(), errno.errorcode.get(get_errno(), 'unknown'))

    return ret

def copyfile_reflink(srcname, dstname):
    "Copy srcname to dstname, making reflink if possible"
    global copyfile
    with open(srcname, 'rb', buffering=0) as src:
        bytes_to_copy = os.fstat(src.fileno()).st_size
        try:
            with open(dstname, 'wb', buffering=0) as dst:
                while bytes_to_copy > 0:
                    bytes_to_copy -= copy_file_range(src.fileno(), dst.fileno(), bytes_to_copy)
        except OSError as e:
            if e.errno not in (errno.EXDEV, errno.ENOSYS, errno.EINVAL, errno.EOPNOTSUPP):
                raise e
            if e.errno == errno.ENOSYS or e.errno == errno.EOPNOTSUPP:
                copyfile = shutil.copyfile
            shutil.copyfile(srcname, dstname)

if hasattr(os, 'copy_file_range'):
    copyfile = copyfile_reflink
    copy_file_range = os.copy_file_range
elif sys.platform == 'linux' and platform.machine() == 'x86_64' and sizeof(c_void_p) == 8:
    copyfile = copyfile_reflink
    copy_file_range = copy_file_range_ctypes
else:
    copyfile = shutil.copyfile

def try_copyfile(src, dst):
    try:
        if os.path.isdir(dst):
            dst = dst + "/" + os.path.basename(src)
        if file_exists(dst, follow_symlinks=False):
            os.remove(dst)
        copyfile(src, dst)
    except PermissionError as e:
        if e.errno == errno.EPERM:
            #be forgiving about permissions errors; if it's a real problem, things will explode later anyway
            log('Error while copying to \"' + dst + '\": ' + e.strerror)
        else:
            raise

def getmtimestr(*path_fragments):
    path = os.path.join(*path_fragments)
    try:
        return str(os.path.getmtime(path))
    except IOError:
        return "0"

def get_validated_steamapps_parent(orig_path):
    try:
        path = os.path.realpath(orig_path)
        if os.path.isdir(path) and os.path.basename(path) == "steamapps":
            parent = os.path.dirname(path)
            if os.access(parent, os.W_OK) and os.stat(path).st_dev == os.stat(parent).st_dev:
                return parent
    except: pass

    log("Error: unable to use parent for game drive, path " + orig_path)
    return orig_path

def try_get_game_library_dir():
    if "STEAM_COMPAT_INSTALL_PATH" not in g_session.env or \
            "STEAM_COMPAT_LIBRARY_PATHS" not in g_session.env:
        return None

    #find library path which is a subset of the game path
    library_paths = g_session.env["STEAM_COMPAT_LIBRARY_PATHS"].split(":")
    for path in library_paths:
        if path in g_session.env["STEAM_COMPAT_INSTALL_PATH"]:
            return get_validated_steamapps_parent(path)

    return None

def try_get_steam_dir():
    if "STEAM_COMPAT_CLIENT_INSTALL_PATH" not in g_session.env:
        return None

    return g_session.env["STEAM_COMPAT_CLIENT_INSTALL_PATH"]

def setup_dir_drive(compat_option, drive_name, dest_dir):
        drive_path = g_compatdata.prefix_dir + "dosdevices/" + drive_name
        if compat_option in g_session.compat_config:
            if not dest_dir:
                if file_exists(drive_path, follow_symlinks=False):
                    os.remove(drive_path)
            else:
                if file_exists(drive_path, follow_symlinks=False):
                    cur_tgt = os.readlink(drive_path)
                    if cur_tgt != dest_dir:
                        os.remove(drive_path)
                        os.symlink(dest_dir, drive_path)
                else:
                    os.symlink(dest_dir, drive_path)
        elif file_exists(drive_path, follow_symlinks=False):
            os.remove(drive_path)

def setup_game_dir_drive():
        setup_dir_drive("gamedrive", "s:", try_get_game_library_dir())

def setup_steam_dir_drive():
        setup_dir_drive("steamdrive", "t:", try_get_steam_dir())


def unix_to_nt_file_name(path):
    return '\\??\\unix' + path

def setup_openvr_paths():
    if 'VR_PATHREG_OVERRIDE' in g_session.env:
        openvr_paths = g_session.env['VR_PATHREG_OVERRIDE']
        del g_session.env['VR_PATHREG_OVERRIDE']
    elif 'XDG_CONFIG_HOME' in g_session.env:
        openvr_paths = os.path.join(g_session.env['XDG_CONFIG_HOME'], 'openvr/openvrpaths.vrpath')
    elif 'HOME' in g_session.env:
        openvr_paths = os.path.join(g_session.env['HOME'], '.config/openvr/openvrpaths.vrpath')
    else:
        openvr_paths = None

    if not openvr_paths or not file_exists(openvr_paths, follow_symlinks=True):
        return

    try:
        with open(openvr_paths, 'r') as file:
            contents = json.load(file)
    except json.decoder.JSONDecodeError:
        return

    if 'runtime' not in contents or type(contents['runtime']) != list:
        contents['runtime'] = []
    if 'config' in contents and type(contents['config']) != list:
        del contents['config']
    if 'log' in contents and type(contents['log']) != list:
        del contents['log']

    if 'VR_OVERRIDE' in g_session.env:
        g_session.env['PROTON_VR_RUNTIME'] = g_session.env['VR_OVERRIDE']
        del g_session.env['VR_OVERRIDE']
    elif len(contents['runtime']) > 0:
        g_session.env['PROTON_VR_RUNTIME'] = contents['runtime'][0]

    contents['runtime'] = ["C:\\vrclient\\", "C:\\vrclient"]

    for i, path in enumerate(contents.get('config', [])):
        contents['config'][i] = unix_to_nt_file_name(path)
    for i, path in enumerate(contents.get('log', [])):
        contents['log'][i] = unix_to_nt_file_name(path)

    openvr_paths = os.path.join(g_compatdata.prefix_dir, "drive_c/users/steamuser/AppData/Local/openvr")
    makedirs(openvr_paths)

    openvr_paths = os.path.join(openvr_paths, "openvrpaths.vrpath")
    with open(openvr_paths, 'w') as file:
        json.dump(contents, file, indent=3)



# Function to find the installed location of DLL files for use by Wine/Proton
# from the NVIDIA Linux driver
#
# See https://gitlab.steamos.cloud/steamrt/steam-runtime-tools/-/issues/71 for
# background on the chosen method of DLL discovery.
#
# On success, returns a str() of the absolute-path to the directory at which DLL
# files are stored
#
# On failure, returns None
def find_nvidia_wine_dll_dir():
    try:
        libdl = CDLL("libdl.so.2")
    except (OSError):
        return None

    try:
        libglx_nvidia = CDLL("libGLX_nvidia.so.0")
    except OSError:
        return None

    # from dlinfo(3)
    #
    # struct link_map {
    #     ElfW(Addr) l_addr;  /* Difference between the
    #                            address in the ELF file and
    #                            the address in memory */
    #     char      *l_name;  /* Absolute pathname where
    #                            object was found */
    #     ElfW(Dyn) *l_ld;    /* Dynamic section of the
    #                            shared object */
    #     struct link_map *l_next, *l_prev;
    #                         /* Chain of loaded objects */
    #
    #     /* Plus additional fields private to the
    #        implementation */
    # };
    RTLD_DI_LINKMAP = 2
    class link_map(Structure):
        _fields_ = [("l_addr", c_void_p), ("l_name", c_char_p), ("l_ld", c_void_p)]

    # from dlinfo(3)
    #
    # int dlinfo (void *restrict handle, int request, void *restrict info)
    dlinfo_func = libdl.dlinfo
    dlinfo_func.argtypes = c_void_p, c_int, c_void_p
    dlinfo_func.restype = c_int

    # Allocate a link_map object
    glx_nvidia_info_ptr = POINTER(link_map)()

    # Run dlinfo(3) on the handle to libGLX_nvidia.so.0, storing results at the
    # address represented by glx_nvidia_info_ptr
    if dlinfo_func(libglx_nvidia._handle,
                   RTLD_DI_LINKMAP,
                   addressof(glx_nvidia_info_ptr)) != 0:
        return None

    # Grab the contents our of our pointer
    glx_nvidia_info = cast(glx_nvidia_info_ptr, POINTER(link_map)).contents

    # Decode the path to our library to a str()
    if glx_nvidia_info.l_name is None:
        return None
    try:
        libglx_nvidia_path = os.fsdecode(glx_nvidia_info.l_name)
    except UnicodeDecodeError:
        return None

    # Follow any symlinks to the actual file
    libglx_nvidia_realpath = os.path.realpath(libglx_nvidia_path)

    # Go to the relative path ./nvidia/wine from our library
    nvidia_wine_dir = os.path.join(os.path.dirname(libglx_nvidia_realpath), "nvidia", "wine")

    # Check that nvngx.dll exists here, or fail
    if file_exists(os.path.join(nvidia_wine_dir, "nvngx.dll"), follow_symlinks=True):
        return nvidia_wine_dir

    return None

EXT2_IOC_GETFLAGS = 0x80086601
EXT2_IOC_SETFLAGS = 0x40086602

EXT4_CASEFOLD_FL = 0x40000000

def set_dir_casefold_bit(dir_path):
    dr = os.open(dir_path, 0o644)
    if dr < 0:
        return
    try:
        dat = array.array('I', [0])
        if fcntl.ioctl(dr, EXT2_IOC_GETFLAGS, dat, True) >= 0:
            dat[0] = dat[0] | EXT4_CASEFOLD_FL
            fcntl.ioctl(dr, EXT2_IOC_SETFLAGS, dat, False)
    except (OSError, IOError):
        #no problem
        pass
    os.close(dr)

def get_replace_reg_value(file, key, name, new_value=None):
    if not file_exists(file, follow_symlinks=True):
        return None
    replaced = False
    out = None
    if new_value is not None:
        out = open(file + ".new", "w")
    found_key = False
    old_value = None
    namestr="\"" + name + "\"="
    with open(file, "r") as reg_in:
        for line in reg_in:
            if not replaced:
                if line[0] == '[':
                    if found_key:
                        if out is not None:
                            out.close()
                        return None
                    if line[1:len(key) + 1] == key:
                        found_key = True
                elif found_key:
                    idx = line.find(namestr)
                    if idx != -1:
                        old_value = line[idx + len(namestr):]
                        if out is not None:
                            out.write(namestr + new_value)
                            replaced = True
                            continue
                        else:
                            return old_value
            if out is not None:
                out.write(line)

    if out is not None:
        out.close()

    if replaced:
        try:
            os.rename(file, file + ".old")
        except OSError:
            os.remove(file)
            pass

        try:
            os.rename(file + ".new", file)
        except OSError:
            log("Unable to write new registry file to " + file)
            pass

    return old_value

class Proton:
    def __init__(self, base_dir):
        self.base_dir = base_dir + "/"
        self.contrib_dir = self.path("contrib/")
        self.dist_dir = self.path("files/")
        self.bin_dir = self.path("files/bin/")
        self.lib_dir = self.path("files/lib/")
        self.fonts_dir = self.path("files/share/fonts/")
        self.media_dir = self.path("files/share/media/")
        self.wine_fonts_dir = self.path("files/share/wine/fonts/")
        self.wine_inf = self.path("files/share/wine/wine.inf")
        self.version_file = self.path("version")
        self.default_pfx_dir = self.path("files/share/default_pfx/")
        self.user_settings_file = self.path("user_settings.py")
        self.wine_bin = self.bin_dir + "wine"
        self.wineserver_bin = self.bin_dir + "wineserver"
        self.xrandr_bin = self.bin_dir + "xrandr"
        self.dist_lock = FileLock(self.path("dist.lock"), timeout=-1)
        self.host_pe_arch = "x86_64-windows"
        self.wow64_pe_arch = "i386-windows"

        if os.environ.get("PROTON_USE_ARM64", "1") == "1" and \
                platform.machine() == 'aarch64' and \
                file_exists(self.path("files/bin-arm64/"), follow_symlinks=True):
            self.host_pe_arch = "aarch64-windows"
            self.default_pfx_dir = self.path("files/share/default_pfx_arm64/")
            self.bin_dir = self.path("files/bin-arm64/")
            self.wine_bin = self.bin_dir + "wine"
            self.xrandr_bin = self.bin_dir + "xrandr"
            self.wineserver_bin = self.bin_dir + "wineserver"

    def path(self, d):
        return self.base_dir + d

    def arch_pe_dir(self, d, wow64):
        return self.lib_dir + d + "/" + (self.wow64_pe_arch if wow64 else self.host_pe_arch) + "/"

    def cleanup_legacy_dist(self):
        old_dist_dir = self.path("dist/")
        if file_exists(old_dist_dir, follow_symlinks=True):
            with self.dist_lock:
                if file_exists(old_dist_dir, follow_symlinks=True):
                    shutil.rmtree(old_dist_dir)

    def do_steampipe_fixups(self):
        fixups_json = self.path("steampipe_fixups.json")
        fixups_mtime = self.path("files/steampipe_fixups_mtime")

        if file_exists(fixups_json, follow_symlinks=True):
            with self.dist_lock:
                import steampipe_fixups

                current_fixup_mtime = None
                if file_exists(fixups_mtime, follow_symlinks=True):
                    with open(fixups_mtime, "r") as f:
                        current_fixup_mtime = f.readline().strip()

                new_fixup_mtime = getmtimestr(fixups_json)

                if current_fixup_mtime != new_fixup_mtime:
                    result_code = steampipe_fixups.do_restore(self.base_dir, fixups_json)

                    if result_code == 0:
                        with open(fixups_mtime, "w") as f:
                            f.write(new_fixup_mtime + "\n")

    def missing_default_prefix(self):
        '''Check if the default prefix dir is missing. Returns true if missing, false if present'''
        return not os.path.isdir(self.default_pfx_dir)

    def make_default_prefix(self):
        with self.dist_lock:
            local_env = dict(g_session.env)
            if self.missing_default_prefix():
                #make default prefix
                local_env["WINEPREFIX"] = self.default_pfx_dir
                local_env["WINEDEBUG"] = "-all"
                g_session.run_proc([self.wine_bin, "wineboot"], local_env)
                g_session.run_proc([self.wineserver_bin, "-w"], local_env)

class CompatData:
    def __init__(self, compatdata):
        self.base_dir = compatdata + "/"
        self.prefix_dir = self.path("pfx/")
        self.creation_sync_guard = self.path("pfx/creation_sync_guard")
        self.version_file = self.path("version")
        self.config_info_file = self.path("config_info")
        self.fex_config_file = self.path("proton-fex-config.json")
        self.tracked_files_file = self.path("tracked_files")
        self.prefix_lock = FileLock(self.path("pfx.lock"), timeout=-1)
        self.old_machine_guid = None

    def path(self, d):
        return self.base_dir + d

    def remove_tracked_files(self):
        if not file_exists(self.tracked_files_file, follow_symlinks=True):
            log("Prefix has no tracked_files??")
            return

        with open(self.tracked_files_file, "r") as tracked_files:
            dirs = []
            for f in tracked_files:
                path = self.prefix_dir + f.strip()
                if file_exists(path, follow_symlinks=False):
                    if os.path.isfile(path) or os.path.islink(path):
                        os.remove(path)
                    else:
                        dirs.append(path)
            for d in dirs:
                try:
                    os.rmdir(d)
                except OSError:
                    #not empty
                    pass

        os.remove(self.tracked_files_file)
        os.remove(self.version_file)

    def upgrade_pfx(self, old_ver):
        if old_ver == CURRENT_PREFIX_VERSION:
            return

        log("Upgrading prefix from " + str(old_ver) + " to " + CURRENT_PREFIX_VERSION + " (" + self.base_dir + ")")

        if old_ver is None:
            return

        if '-' not in old_ver:
            #How can this happen??
            log("Prefix has an invalid version?! You may want to back up user files and delete this prefix.")
            #If it does, just let the Wine upgrade happen and hope it works...
            return

        try:
            old_proton_ver, old_prefix_ver = old_ver.split('-')
            old_proton_maj, old_proton_min = old_proton_ver.split('.')
            new_proton_ver, _              = CURRENT_PREFIX_VERSION.split('-')
            new_proton_maj, new_proton_min = new_proton_ver.split('.')

            if int(new_proton_maj) < int(old_proton_maj) or \
                    (int(new_proton_maj) == int(old_proton_maj) and \
                     int(new_proton_min) < int(old_proton_min)):
                log("Removing newer prefix")
                self.old_machine_guid = get_replace_reg_value(self.prefix_dir + "system.reg", "Software\\\\Microsoft\\\\Cryptography", "MachineGuid")
                if old_proton_ver == "3.7" and not file_exists(self.tracked_files_file, follow_symlinks=True):
                    #proton 3.7 did not generate tracked_files, so copy it into place first
                    try_copy(g_proton.path("proton_3.7_tracked_files"), self.tracked_files_file)
                self.remove_tracked_files()
                path = self.prefix_dir + "/drive_c/Program Files (x86)/Ubisoft/Ubisoft Game Launcher/version.txt"
                if file_exists(path, follow_symlinks=False) and os.path.isfile(path):
                    os.remove(path)
                if file_exists(self.creation_sync_guard, follow_symlinks=False):
                    os.remove(self.creation_sync_guard)
                return

            if old_proton_ver == "3.7" and old_prefix_ver == "1":
                if not file_exists(self.prefix_dir + "/drive_c/windows/syswow64/kernel32.dll", follow_symlinks=True):
                    #shipped a busted 64-bit-only installation on 20180822. detect and wipe clean
                    log("Detected broken 64-bit-only installation, re-creating prefix.")
                    shutil.rmtree(self.prefix_dir)
                    return

            #replace broken .NET installations with wine-mono support
            if file_exists(self.prefix_dir + "/drive_c/windows/Microsoft.NET/NETFXRepair.exe", follow_symlinks=True) and \
                    file_is_wine_builtin_dll(self.prefix_dir + "/drive_c/windows/system32/mscoree.dll"):
                log("Broken .NET installation detected, switching to wine-mono.")
                #deleting this directory allows wine-mono to work
                shutil.rmtree(self.prefix_dir + "/drive_c/windows/Microsoft.NET")

            #prior to prefix version 4.11-2, all controllers were xbox controllers. wipe out the old registry entries.
            if (int(old_proton_maj) < 4 or (int(old_proton_maj) == 4 and int(old_proton_min) == 11)) and \
                    int(old_prefix_ver) < 2:
                log("Removing old xinput registry entries.")
                with open(self.prefix_dir + "system.reg", "r") as reg_in:
                    with open(self.prefix_dir + "system.reg.new", "w") as reg_out:
                        for line in reg_in:
                            if line[0] == '[' and "CurrentControlSet" in line and "IG_" in line:
                                if "DeviceClasses" in line:
                                    reg_out.write(line.replace("DeviceClasses", "DeviceClasses_old"))
                                elif "Enum" in line:
                                    reg_out.write(line.replace("Enum", "Enum_old"))
                            else:
                                reg_out.write(line)
                try:
                    os.rename(self.prefix_dir + "system.reg", self.prefix_dir + "system.reg.old")
                except OSError:
                    os.remove(self.prefix_dir + "system.reg")
                    pass

                try:
                    os.rename(self.prefix_dir + "system.reg.new", self.prefix_dir + "system.reg")
                except OSError:
                    log("Unable to write new registry file to " + self.prefix_dir + "system.reg")
                    pass

            delete_dde_keys = {}
            # Prior to prefix version 6.3-3, ShellExecute* APIs used DDE.
            # Wipe out old registry entries.
            if int(old_proton_maj) < 6 or (int(old_proton_maj) == 6 and int(old_proton_min) < 3) or \
                    (int(old_proton_maj) == 6 and int(old_proton_min) == 3 and int(old_prefix_ver) < 3):
                delete_dde_keys = {
                    "[Software\\\\Classes\\\\htmlfile\\\\shell\\\\open\\\\ddeexec",
                    "[Software\\\\Classes\\\\pdffile\\\\shell\\\\open\\\\ddeexec",
                    "[Software\\\\Classes\\\\xmlfile\\\\shell\\\\open\\\\ddeexec",
                    "[Software\\\\Classes\\\\ftp\\\\shell\\\\open\\\\ddeexec",
                    "[Software\\\\Classes\\\\http\\\\shell\\\\open\\\\ddeexec",
                    "[Software\\\\Classes\\\\https\\\\shell\\\\open\\\\ddeexec",
                }
                dde_wb = '@="\\"C:\\\\windows\\\\system32\\\\winebrowser.exe\\" -nohome"'
                log("Removing ShellExecute DDE registry entries.")

            delete_keys = {}
            # Remove shadergpures.sys service which was set up in prefix versions before 11
            if int(old_proton_maj) < 11:
                delete_keys = {
                    "[System\\\\ControlSet001\\\\Services\\\\SharedGpuResources]",
                    "[System\\\\CurrentControlSet\\\\Services\\\\SharedGpuResources]",
                }
                log("Removing sharedgpures.sys service.")

            if delete_dde_keys or delete_keys:
                sysreg_fp = self.prefix_dir + "system.reg"
                new_sysreg_fp = self.prefix_dir + "system.reg.new"


                with open(sysreg_fp, "r") as reg_in:
                    with open(new_sysreg_fp, "w") as reg_out:
                        deleting_key = False
                        for line in reg_in:
                            if deleting_key:
                                if line[0] != '[':
                                    continue
                                deleting_key = False
                            if line.split(' ')[0] in delete_keys:
                                deleting_key = True
                                continue
                            if not delete_dde_keys:
                                reg_out.write(line)
                                continue
                            if line[:line.find("ddeexec")+len("ddeexec")] in delete_dde_keys:
                                reg_out.write(line.replace("ddeexec", "ddeexec_old", 1))
                            elif line.rstrip() == dde_wb:
                                reg_out.write(line.replace("-nohome", "%1"))
                            else:
                                reg_out.write(line)

                # Slightly randomize backup file name to avoid colliding with
                # other backups.
                backup_sysreg_fp = "{}system.reg.{:x}.old".format(self.prefix_dir, randrange(16 ** 8))

                try:
                    os.rename(sysreg_fp, backup_sysreg_fp)
                except OSError:
                    log("Failed to back up old system.reg. Simply deleting it.")
                    os.remove(sysreg_fp)
                    pass

                try:
                    os.rename(new_sysreg_fp, sysreg_fp)
                except OSError:
                    log("Unable to write new registry file to " + sysreg_fp)
                    pass

            if int(old_proton_maj) < 10 or (int(old_proton_maj) == 10 and
                                            int(old_proton_min) == 0 and
                                            int(old_prefix_ver) < 105):
                with open(self.creation_sync_guard, "w"):
                    pass
                os.sync()

            stale_builtins = [self.prefix_dir + "/drive_c/windows/system32/amd_ags_x64.dll",
                              self.prefix_dir + "/drive_c/windows/syswow64/amd_ags_x64.dll",
                              self.prefix_dir + "/drive_c/windows/system32/ir50_32.dll",
                              self.prefix_dir + "/drive_c/windows/syswow64/ir50_32.dll" ]
            for builtin in stale_builtins:
                if file_exists(builtin, follow_symlinks=False) and file_is_wine_builtin_dll(builtin):
                    log("Removing stale builtin " + builtin)
                    os.remove(builtin)

            stale_vkd3d = [self.prefix_dir + "/drive_c/windows/system32/libvkd3d-1.dll",
                           self.prefix_dir + "/drive_c/windows/syswow64/libvkd3d-1.dll",
                           self.prefix_dir + "/drive_c/windows/system32/libvkd3d-shader-1.dll",
                           self.prefix_dir + "/drive_c/windows/syswow64/libvkd3d-shader-1.dll" ]
            for dll in stale_vkd3d:
                if file_exists(dll, follow_symlinks=False):
                    log("Removing stale vkd3d dll " + dll)
                    os.remove(dll)

        except ValueError:
            log("Prefix has an invalid version?! You may want to back up user files and delete this prefix.")
            #Just let the Wine upgrade happen and hope it works...
            with open(self.creation_sync_guard, "w"):
                pass
            os.sync()
            return

    def pfx_copy(self, src, dst, dll_copy=False):
        if os.path.islink(src):
            contents = os.readlink(src)
            if os.path.dirname(contents).endswith(('/lib/wine/i386-unix', '/lib/wine/i386-windows',
                                                   '/lib/wine/x86_64-unix', '/lib/wine/x86_64-windows',
                                                   '/lib/wine/aarch64-unix', '/lib/wine/aarch64-windows',
                                                   # old paths:
                                                   '/lib64/wine/x86_64-unix', '/lib64/wine/x86_64-windows')):
                # wine builtin dll
                # make the destination an absolute symlink
                contents = os.path.normpath(os.path.join(os.path.dirname(src), contents))
            if dll_copy:
                try_copyfile(src, dst)
            else:
                os.symlink(contents, dst)
        else:
            try_copyfile(src, dst)

    def copy_pfx(self):
        with open(self.tracked_files_file, "w") as tracked_files:
            for src_dir, dirs, files in os.walk(g_proton.default_pfx_dir):
                rel_dir = src_dir.replace(g_proton.default_pfx_dir, "", 1).lstrip('/')
                if len(rel_dir) > 0:
                    rel_dir = rel_dir + "/"
                dst_dir = src_dir.replace(g_proton.default_pfx_dir, self.prefix_dir, 1)
                if not file_exists(dst_dir, follow_symlinks=True):
                    makedirs(dst_dir)
                    tracked_files.write(rel_dir + "\n")
                for dir_ in dirs:
                    src_file = os.path.join(src_dir, dir_)
                    dst_file = os.path.join(dst_dir, dir_)
                    if os.path.islink(src_file) and not file_exists(dst_file, follow_symlinks=True):
                        self.pfx_copy(src_file, dst_file)
                for file_ in files:
                    src_file = os.path.join(src_dir, file_)
                    dst_file = os.path.join(dst_dir, file_)
                    if not file_exists(dst_file, follow_symlinks=True):
                        self.pfx_copy(src_file, dst_file)
                        tracked_files.write(rel_dir + file_ + "\n")

            created_dirs = []
            for rel_dir in STANDARD_PREFIX_DIRECTORIES:
                dst_dir = self.prefix_dir.rstrip('/')
                for component in rel_dir.split('/'):
                    dst_dir = os.path.join(dst_dir, component)
                    if not file_exists(dst_dir, follow_symlinks=True):
                        makedirs(dst_dir)
                        created_dirs.append(os.path.relpath(dst_dir, self.prefix_dir))

            # Track children before parents so prefix upgrades can remove them.
            for rel_dir in reversed(created_dirs):
                tracked_files.write(rel_dir + "/\n")
        # Set .update-timestamp so Wine doesn't try to update the prefix.
        # This is needed in case the mtime of wine.inf has changed in distribution.
        with open(os.path.join(self.prefix_dir, '.update-timestamp'), 'w') as update_timestamp:
            mtime = int(os.stat(g_proton.wine_inf).st_mtime)
            update_timestamp.write(str(mtime))

    def update_builtin_libs(self, dll_copy_patterns):
        dll_copy_patterns = dll_copy_patterns.split(',')
        prev_tracked_files = set()
        with open(self.tracked_files_file, "r") as tracked_files:
            for line in tracked_files:
                prev_tracked_files.add(line.strip())
        with open(self.tracked_files_file, "a") as tracked_files:
            for src_dir, _, files in os.walk(g_proton.default_pfx_dir):
                rel_dir = src_dir.replace(g_proton.default_pfx_dir, "", 1).lstrip('/')
                if len(rel_dir) > 0:
                    rel_dir = rel_dir + "/"
                dst_dir = src_dir.replace(g_proton.default_pfx_dir, self.prefix_dir, 1)
                if not file_exists(dst_dir, follow_symlinks=True):
                    makedirs(dst_dir)
                    tracked_files.write(rel_dir + "\n")
                for file_ in files:
                    src_file = os.path.join(src_dir, file_)
                    dst_file = os.path.join(dst_dir, file_)
                    if not file_is_wine_builtin_dll(src_file):
                        # Not a builtin library
                        continue
                    if file_is_wine_builtin_dll(dst_file):
                        os.unlink(dst_file)
                    elif file_exists(dst_file, follow_symlinks=False):
                        # builtin library was replaced
                        continue
                    else:
                        os.makedirs(dst_dir, exist_ok=True)
                    dll_copy = any(fnmatch.fnmatch(file_, pattern) for pattern in dll_copy_patterns)
                    self.pfx_copy(src_file, dst_file, dll_copy)
                    tracked_name = rel_dir + file_
                    if tracked_name not in prev_tracked_files:
                        tracked_files.write(tracked_name + "\n")

    def create_symlink(self, lname, fname):
        if file_exists(lname, follow_symlinks=False):
            if os.path.islink(lname):
                os.remove(lname)
                os.symlink(fname, lname)
        else:
            os.symlink(fname, lname)

    def create_fonts_symlinks(self):
        ALTERNATIVES = {
            ('1313860', 'arial.ttf'),    # FIFA 21
            ('1506830', 'arial.ttf'),    # FIFA 22
        }
        windowsfonts = self.prefix_dir + "/drive_c/windows/Fonts"
        makedirs(windowsfonts)
        sgi = os.environ.get('SteamGameId', '')
        for fonts_dir in [g_proton.fonts_dir, g_proton.wine_fonts_dir]:
            for font in os.listdir(fonts_dir):
                if not font.endswith('.ttf') and not font.endswith('.ttc'):
                    continue
                lname = os.path.join(windowsfonts, font)
                fname = os.path.join(fonts_dir, font)
                if (sgi, font) in ALTERNATIVES:
                    fname = os.path.join(fonts_dir, 'alt', font)
                self.create_symlink(lname, fname)

    def remove_prefix_file(self, path):
        path = os.path.join(self.prefix_dir, path)
        if file_exists(path, follow_symlinks=False):
            os.remove(path)
        if file_exists(path + ".debug", follow_symlinks=False):
            os.remove(path + ".debug")

    def setup_ddraw(self, use_d7vk):
        wine_ddraw64 = g_proton.arch_pe_dir("wine", False) + "ddraw.dll"
        wine_ddraw32 = g_proton.arch_pe_dir("wine", True) + "ddraw.dll"
        d7vk_ddraw = g_proton.arch_pe_dir("wine/d7vk", True) + "ddraw.dll"
        system32_ddraw = "drive_c/windows/system32/ddraw.dll"
        syswow64_ddraw = "drive_c/windows/syswow64/ddraw.dll"
        syswow64_wine_ddraw = "drive_c/windows/syswow64/ddraw_.dll"

        if not use_d7vk:
            if file_exists(os.path.join(self.prefix_dir, syswow64_wine_ddraw), follow_symlinks=False):
                self.remove_prefix_file(syswow64_ddraw)
                self.remove_prefix_file(syswow64_wine_ddraw)
                try_copy(wine_ddraw32, syswow64_ddraw, prefix=self.prefix_dir, link_debug=True)
            return

        self.remove_prefix_file(syswow64_ddraw)
        self.remove_prefix_file(syswow64_wine_ddraw)

        if not file_exists(os.path.join(self.prefix_dir, system32_ddraw), follow_symlinks=True):
            try_copy(wine_ddraw64, system32_ddraw, prefix=self.prefix_dir, link_debug=True)

        if not file_exists(d7vk_ddraw, follow_symlinks=True):
            log("D7VK requested but ddraw.dll was not found at %s" % d7vk_ddraw)
            try_copy(wine_ddraw32, syswow64_ddraw,
                    prefix=self.prefix_dir, link_debug=True)
            return

        try_copy(wine_ddraw32, syswow64_wine_ddraw, prefix=self.prefix_dir, link_debug=True)
        try_copy(d7vk_ddraw, syswow64_ddraw, prefix=self.prefix_dir, link_debug=True)
        append_to_env_str(g_session.env, "WINEDLLOVERRIDES", "ddraw=n,b", ";")

    def migrate_user_paths(self):
        #move winxp-style paths to vista+ paths. we can't do this in
        #upgrade_pfx because Steam may drop cloud files here at any time.
        for (old, new, link) in \
                [
                    ("drive_c/users/steamuser/Local Settings/Application Data",
                        self.prefix_dir + "drive_c/users/steamuser/AppData/Local",
                        "../AppData/Local"),
                    ("drive_c/users/steamuser/Application Data",
                        self.prefix_dir + "drive_c/users/steamuser/AppData/Roaming",
                        "./AppData/Roaming"),
                    ("drive_c/users/steamuser/My Documents",
                        self.prefix_dir + "drive_c/users/steamuser/Documents",
                        "./Documents"),
                ]:

            #running unofficial Proton/Wine builds against a Proton prefix could
            #create an infinite symlink loop. detect this and clean it up.
            if file_exists(new, follow_symlinks=False) and os.path.islink(new) and os.readlink(new).endswith(old):
                os.remove(new)

            old = self.prefix_dir + old

            if file_exists(old, follow_symlinks=False) and not os.path.islink(old):
                merge_user_dir(src=old, dst=new)
                os.rename(old, old + " BACKUP")
            if not file_exists(old, follow_symlinks=False):
                makedirs(os.path.dirname(old))
                os.symlink(src=link, dst=old)
            elif os.path.islink(old) and not (os.readlink(old) == link):
                os.remove(old)
                os.symlink(src=link, dst=old)

    def setup_prefix(self):
        with self.prefix_lock:
            if file_exists(self.version_file, follow_symlinks=True):
                with open(self.version_file, "r") as f:
                    old_ver = f.readline().strip()
            else:
                old_ver = None

            self.upgrade_pfx(old_ver)

            if not file_exists(self.creation_sync_guard, follow_symlinks=False):
                makedirs(self.prefix_dir + "/drive_c")
                set_dir_casefold_bit(self.prefix_dir + "/drive_c")

                self.copy_pfx()
                machine_guid = self.old_machine_guid
                if machine_guid is None:
                    machine_guid = "\"" + str(uuid.uuid4()) + "\""
                get_replace_reg_value(self.prefix_dir + "system.reg", "Software\\\\Microsoft\\\\Cryptography", "MachineGuid", machine_guid)
                os.sync()

                with open(self.creation_sync_guard, "w"):
                    pass
                os.sync()

            self.migrate_user_paths()

            if not file_exists(self.prefix_dir + "/dosdevices/c:", follow_symlinks=False):
                os.makedirs(f"{self.prefix_dir}/dosdevices", exist_ok=True)
                os.symlink("../drive_c", self.prefix_dir + "/dosdevices/c:")

            if not file_exists(self.prefix_dir + "/dosdevices/z:", follow_symlinks=False):
                os.makedirs(f"{self.prefix_dir}/dosdevices", exist_ok=True)
                os.symlink("/", self.prefix_dir + "/dosdevices/z:")

            # collect configuration info
            steamdir = os.environ["STEAM_COMPAT_CLIENT_INSTALL_PATH"]

            use_wined3d = "wined3d" in g_session.compat_config
            use_dxvk_dxgi = not use_wined3d and \
                    not ("WINEDLLOVERRIDES" in g_session.env and "dxgi=b" in g_session.env["WINEDLLOVERRIDES"])
            use_nvapi = (('disablenvapi' not in g_session.compat_config or 'forcenvapi' in g_session.compat_config) and
                        g_proton.host_pe_arch != "aarch64-windows")
            use_dxvk_d3d8 = "dxvkd3d8" in g_session.compat_config

            builtin_dll_copy = os.environ.get("PROTON_DLL_COPY",
                    #dxsetup redist
                    "d3dcompiler_*.dll," +
                    "d3dcsx*.dll," +
                    "d3dx*.dll," +
                    "dx8vb.dll," +
                    "x3daudio*.dll," +
                    "xactengine*.dll," +
                    "xapofx*.dll," +
                    "xaudio*.dll," +
                    "xinput*.dll," +

                    #vcruntime redist
                    "atl1*.dll," +
                    "atl.dll," +
                    "concrt*.dll," +
                    "msvcp1*.dll," +
                    "msvcrt*.dll," +
                    "msvcp7*.dll," +
                    "msvcp6*.dll," +
                    "msvcp_win.dll," +
                    "msvcr1*.dll," +
                    "msvcrt*.dll," +
                    "msvcr7*.dll," +
                    "vcamp1*.dll," +
                    "vcomp1*.dll," +
                    "vccorlib1*.dll," +
                    "vcruntime1*.dll," +
                    "ucrtbase.dll," +

                    #there are different instances (comctl32.dll in system32 and a copy of comctl32_v6.dll
                    #in winsxs, handle that by leaving a copy)
                    "comctl32.dll," +

                    #some games balk at ntdll symlink(?)
                    "ntdll.dll," +

                    #some games require official vulkan loader
                    "vulkan-1.dll," +

                    #let the games install native
                    "ir50_32.dll"
                    )

            # If any of this info changes, we must rerun the tasks below
            prefix_info = '\n'.join((
                CURRENT_PREFIX_VERSION,
                g_proton.fonts_dir,
                g_proton.lib_dir,
                steamdir,
                getmtimestr(steamdir, 'legacycompat', 'steamclient.dll'),
                getmtimestr(steamdir, 'legacycompat', 'steamclient64.dll'),
                getmtimestr(steamdir, 'legacycompat', 'Steam.dll'),
                g_proton.default_pfx_dir,
                getmtimestr(g_proton.default_pfx_dir, 'system.reg'),
                str(use_wined3d),
                str(use_dxvk_dxgi),
                builtin_dll_copy,
                str(use_nvapi),
                str(use_dxvk_d3d8),
            ))

            # check whether any prefix config has changed
            try:
                with open(self.config_info_file, "r") as f:
                    old_prefix_info = f.read()
            except IOError:
                old_prefix_info = ""

            if old_ver != CURRENT_PREFIX_VERSION or old_prefix_info != prefix_info:
                # update builtin dll symlinks or copies
                self.update_builtin_libs(builtin_dll_copy)

                with open(self.config_info_file, "w") as f:
                    f.write(prefix_info)

            with open(self.version_file, "w") as f:
                f.write(CURRENT_PREFIX_VERSION + "\n")

            #create font files symlinks
            self.create_fonts_symlinks()

            with open(self.tracked_files_file, "a") as tracked_files:
                #copy steam files into place
                steam_dir = "drive_c/Program Files (x86)/Steam/"
                makedirs(self.prefix_dir + steam_dir)
                filestocopy = [("steamclient.dll", "steamclient.dll"),
                               ("steamclient64.dll", "steamclient64.dll"),
                               ("GameOverlayRenderer64.dll", "GameOverlayRenderer64.dll"),
                               ("SteamService.exe", "steam.exe"),
                               ("Steam.dll", "Steam.dll")]
                for (src,tgt) in filestocopy:
                    srcfile = steamdir + '/legacycompat/' + src
                    if os.path.isfile(srcfile):
                        try_copy(srcfile, steam_dir + tgt, prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                filestocopy = [("steamclient64.dll", "steamclient64.dll"),
                               ("GameOverlayRenderer.dll", "GameOverlayRenderer.dll"),
                               ("GameOverlayRenderer64.dll", "GameOverlayRenderer64.dll")]
                for (src,tgt) in filestocopy:
                    srcfile = g_proton.path(src)
                    if os.path.isfile(srcfile):
                        try_copy(srcfile, steam_dir + tgt, prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                # CW Bug 19152. IL-2 Sturmovik: Cliffs of Dover Blitz Edition needs user's localconfig.vdf
                if os.environ.get("SteamGameId", 0) == "754530":
                    srcdir = os.path.join(steamdir, 'userdata')
                    dstdir = os.path.join(self.prefix_dir, steam_dir, 'userdata')
                    # figuring out the current user is hard, so copy the config for all users
                    for userid in os.listdir(srcdir):
                        srcvdf = os.path.join(srcdir, userid, 'config', 'localconfig.vdf')
                        dstvdf = os.path.join(dstdir, userid, 'config', 'localconfig.vdf')
                        if not os.path.exists(srcvdf):
                            continue
                        os.makedirs(os.path.dirname(dstvdf), exist_ok=True)
                        shutil.copyfile(srcvdf, dstvdf)

                #copy openvr files into place
                makedirs(self.prefix_dir + "/drive_c/vrclient/bin")
                try_copy(g_proton.arch_pe_dir("wine", True) + "vrclient.dll", "drive_c/vrclient/bin",
                        prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                try_copy(g_proton.arch_pe_dir("wine", False) + "vrclient_x64.dll", "drive_c/vrclient/bin",
                        prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                try_copy(g_proton.arch_pe_dir("wine/dxvk", True) + "openvr_api_dxvk.dll", "drive_c/windows/syswow64",
                        prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                try_copy(g_proton.arch_pe_dir("wine/dxvk", False) + "openvr_api_dxvk.dll", "drive_c/windows/system32",
                        prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                #copy x86_64 wineopenxr files into place
                makedirs(self.prefix_dir + "/drive_c/openxr")
                try_copy(g_proton.dist_dir + "share/openxr/wineopenxr64.json", "drive_c/openxr",
                        prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                if use_wined3d:
                    dxvkfiles = []
                    vkd3d_protonfiles = []
                    wined3dfiles = ["d3d12", "d3d11", "d3d10", "d3d10core", "d3d10_1", "d3d9"]
                else:
                    dxvkfiles = ["d3d11", "d3d10core", "d3d9"]
                    vkd3d_protonfiles = ["d3d12", "d3d12core"]
                    wined3dfiles = []

                if use_dxvk_dxgi:
                    dxvkfiles.append("dxgi")
                else:
                    wined3dfiles.append("dxgi")

                if use_dxvk_d3d8:
                    dxvkfiles.append("d3d8")
                else:
                    wined3dfiles.append("d3d8")

                icufiles = ["icuin68", "icuuc68", "icudt68"]

                for f in wined3dfiles:
                    try_copy(g_proton.default_pfx_dir + "drive_c/windows/system32/" + f + ".dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.default_pfx_dir + "drive_c/windows/syswow64/" + f + ".dll", "drive_c/windows/syswow64",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                for f in dxvkfiles:
                    try_copy(g_proton.arch_pe_dir("wine/dxvk", False) + f + ".dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.arch_pe_dir("wine/dxvk", True) + f + ".dll", "drive_c/windows/syswow64",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides[f] = "n"

                for f in vkd3d_protonfiles:
                    optional = False
                    if f == "d3d12core":
                        optional = True
                    try_copy(g_proton.arch_pe_dir("wine/vkd3d-proton", False) + f + ".dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True, optional=optional)
                    try_copy(g_proton.arch_pe_dir("wine/vkd3d-proton", True) + f + ".dll", "drive_c/windows/syswow64",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True, optional=optional)
                    g_session.dlloverrides[f] = "n"

                for f in icufiles:
                    dst = "drive_c/windows/system32/" + f + ".dll"
                    if not file_exists(self.prefix_dir + dst, follow_symlinks=False):
                        tracked_files.write(dst + '\n')
                    self.create_symlink(self.prefix_dir + dst, g_proton.arch_pe_dir("wine/icu", False) + f + ".dll")

                    dst = "drive_c/windows/syswow64/" + f + ".dll"
                    if not file_exists(self.prefix_dir + dst, follow_symlinks=False):
                        tracked_files.write(dst + '\n')
                    self.create_symlink(self.prefix_dir + dst, g_proton.arch_pe_dir("wine/icu", True) + f + ".dll")

                allow_nvidia_libs = os.path.isdir(g_proton.lib_dir + "wine/nvidia-libs")
                disable_nvlibs32 = "nvidialibsno32" in g_session.compat_config or "wow64" in g_session.compat_config
                use_nvoptix = "nvoptix" in g_session.compat_config and allow_nvidia_libs
                use_nvml = ("nvml" in g_session.compat_config and allow_nvidia_libs) or use_nvoptix
                use_nvenc = "nvenc" in g_session.compat_config and allow_nvidia_libs
                use_nvcuda = ("nvcuda" in g_session.compat_config and allow_nvidia_libs) or use_nvenc or use_nvoptix

                nvapi_path = "nvapi/"

                # If the user requested the NVAPI be available, copy it into place.
                # If they didn't, clean up any stray nvapi DLLs.
                if use_nvapi:
                    try_copy(g_proton.arch_pe_dir("wine/" + nvapi_path, False) + "nvapi64.dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.arch_pe_dir("wine/" + nvapi_path, False) + "nvofapi64.dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.arch_pe_dir("wine/" + nvapi_path, True) + "nvapi.dll", "drive_c/windows/syswow64",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvapi64"] = "n"
                    g_session.dlloverrides["nvofapi64"] = "n"
                    g_session.dlloverrides["nvapi"] = "n"
                    g_session.dlloverrides["nvcuda"] = "b"
                else:
                    nvapi64_dll = self.prefix_dir + "drive_c/windows/system32/nvapi64.dll"
                    nvapi32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvapi.dll"
                    if file_exists(nvapi64_dll, follow_symlinks=False):
                        os.unlink(nvapi64_dll)
                    if file_exists(nvapi64_dll + '.debug', follow_symlinks=False):
                        os.unlink(nvapi64_dll + '.debug')
                    if file_exists(nvapi32_dll, follow_symlinks=False):
                        os.unlink(nvapi32_dll)
                    if file_exists(nvapi32_dll + '.debug', follow_symlinks=False):
                        os.unlink(nvapi32_dll + '.debug')

                if use_nvcuda and use_nvapi:
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvcuda", False) + "nvcuda.dll.so", "drive_c/windows/system32/nvcuda.dll",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvcuda"] = "n,b"
                else:
                    nvcuda64_dll = self.prefix_dir + "drive_c/windows/system32/nvcuda.dll"
                    if file_exists(nvcuda64_dll, follow_symlinks=False):
                        os.unlink(nvcuda64_dll)
                    try_copy(g_proton.default_pfx_dir + "drive_c/windows/system32/nvcuda.dll", "drive_c/windows/system32",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                if use_nvcuda and use_nvapi and not disable_nvlibs32:
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvcuda", True) + "nvcuda.dll.so", "drive_c/windows/syswow64/nvcuda.dll",
                             prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvcuda"] = "n,b"
                else:
                    nvcuda32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvcuda.dll"
                    if file_exists(nvcuda32_dll, follow_symlinks=False):
                        os.unlink(nvcuda32_dll)
                    try_copy(g_proton.default_pfx_dir + "drive_c/windows/syswow64/nvcuda.dll", "drive_c/windows/syswow64",
                             prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                if use_nvenc and use_nvapi:
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvenc", False) + "nvcuvid.dll.so", "drive_c/windows/system32/nvcuvid.dll",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvenc", False) + "nvencodeapi64.dll.so", "drive_c/windows/system32/nvencodeapi64.dll",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvcuvid"] = "n,b"
                    g_session.dlloverrides["nvencodeapi64"] = "n,b"
                else:
                    nvcuvid64_dll = self.prefix_dir + "drive_c/windows/system32/nvcuvid.dll"
                    nvencodeapi64_dll = self.prefix_dir + "drive_c/windows/system32/nvencodeapi64.dll"
                    if file_exists(nvcuvid64_dll, follow_symlinks=False):
                        os.unlink(nvcuvid64_dll)
                    if file_exists(nvencodeapi64_dll, follow_symlinks=False):
                        os.unlink(nvencodeapi64_dll)

                if use_nvenc and use_nvapi and not disable_nvlibs32:
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvenc", True) + "nvcuvid.dll.so", "drive_c/windows/syswow64/nvcuvid.dll",
                             prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvenc", True) + "nvencodeapi.dll.so", "drive_c/windows/syswow64/nvencodeapi.dll",
                             prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvcuvid"] = "n,b"
                    g_session.dlloverrides["nvencodeapi"] = "n,b"
                else:
                    nvcuvid32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvcuvid.dll"
                    nvencodeapi32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvencodeapi.dll"
                    if file_exists(nvcuvid32_dll, follow_symlinks=False):
                        os.unlink(nvcuvid32_dll)
                    if file_exists(nvencodeapi32_dll, follow_symlinks=False):
                        os.unlink(nvencodeapi32_dll)

                if use_nvml and use_nvapi:
                    prepend_to_env_str(g_session.env, "WINEDLLPATH", g_proton.lib_dir + "wine/nvidia-libs/nvml/wine", ":")
                else:
                    nvml64_dll = self.prefix_dir + "drive_c/windows/system32/nvml.dll"
                    nvml32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvml.dll"
                    if file_exists(nvml64_dll, follow_symlinks=False):
                        os.unlink(nvml64_dll)
                    if file_exists(nvml32_dll, follow_symlinks=False):
                        os.unlink(nvml32_dll)

                if use_nvoptix and use_nvapi:
                    try_copy(g_proton.arch_pe_dir("wine/nvidia-libs/nvoptix", False) + "nvoptix.dll.so", "drive_c/windows/system32/nvoptix.dll",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)
                    g_session.dlloverrides["nvoptix"] = "n,b"
                else:
                    nvoptix64_dll = self.prefix_dir + "drive_c/windows/system32/nvoptix.dll"
                    nvoptix32_dll = self.prefix_dir + "drive_c/windows/syswow64/nvoptix.dll"
                    if file_exists(nvoptix64_dll, follow_symlinks=False):
                        os.unlink(nvoptix64_dll)
                    if file_exists(nvoptix32_dll, follow_symlinks=False):
                        os.unlink(nvoptix32_dll)

                if os.path.exists(g_proton.lib_dir + "wine/discord-rpc-bridge/bridge.exe"):
                    makedirs(self.prefix_dir + "drive_c/windows/system32/discord/")
                    try_copy(g_proton.lib_dir + "wine/discord-rpc-bridge/bridge.exe", "drive_c/windows/system32/discord/bridge.exe",
                            prefix=self.prefix_dir, track_file=tracked_files, link_debug=True)

                # Try to detect known DLLs that ship with the NVIDIA Linux Driver
                # and add them into the prefix
                if g_session.nvidia_wine_dll_dir:
                    for dll in ["_nvngx.dll", "nvngx.dll"]:
                        try_copy(g_session.nvidia_wine_dll_dir + "/" + dll,
                                 "drive_c/windows/system32",
                                 optional=True,
                                 prefix=self.prefix_dir,
                                 track_file=tracked_files,
                                 link_debug=True)

            setup_game_dir_drive()
            setup_steam_dir_drive()
            setup_openvr_paths()

	    # valve ffmpeg configuration below is disabled for proton-ge, we ship our own ffmpeg build.
            # add Steam ffmpeg libraries to path
            #prepend_to_env_str(g_session.env, ld_path_var, steamdir + "/ubuntu12_64/video/:" + steamdir + "/ubuntu12_32/video/:" + steamdir + "/steamrtarm64/video/", ":")

def comma_escaped(s):
    escaped = False
    idx = -1
    while s[idx] == '\\':
        escaped = not escaped
        idx = idx - 1
    return escaped

additional_config = utilities.proton_add_config()

#hopefully short-lived, app-specific workarounds for Proton bugs
def default_compat_config():
    ret = set()
    ret.update(additional_config)
    if "SteamAppId" in os.environ:
        appid = os.environ["SteamAppId"]
        if appid in [
                #affected by CW bug 19741
                "1017900", #Age of Empires: Definitive Edition

                #affected by CW bug 20240
                "1331440", #FUSER

                #affected by Unity race
                "2620730", #DEVIATOR - CW bug 24913
                "2882920", #SSR Wives: The Murder Of My Winter Crush Demo - CW bug 25730
                "2712910", #Spark & Kling - CW bug 25778
                ]:
            ret.add("nomfdxgiman")

        if appid in [
                # OPWR may be causing text input delays in login windows in these games on XWayland due to
                # blit happening before presentation
                "1172620", #Sea of Thieves
                "962130", #Grounded
                "495420", #State of Decay 2: Juggernaut Edition
                "976730", #Halo: The Master Chief Collection
                "1017900", #Age of Empires: Definitive Edition
                "1056090", #Ori and the Will of the Wisps
                "1293830", #Forza Horizon 4
                "1551360", #Forza Horizon 5
                "813780", #Age of Empires II: Definitive Edition
                "933110", #Age of Empires III: Definitive Edition
                "1466860", #Age of Empires IV
                "1097840", #Gears 5
                "1244950", #Battletoads
                "1189800", #Bleeding Edge
                "1184050", #Gears Tactics
                "1240440", #Halo Infinite
                "1250410", #Microsoft Flight Simulator
                "1672970", #Minecraft Dungeons
                "1180660", #Tell Me Why
                "1238430", #Tell Me Why Chapter 2
                "1266670", #Tell Me Why Chapter 3
                # Other issues arising from OWPR code path in apps, e. g., hitting unimplemented bits in
                # d3dcompiler.
                "230410", #Warframe
                "3513350", #Wuthering Waves
                "3728370",
                ]:
            ret.add("noopwr")

        if appid in [
                "2710",     #Act of War: Direct Action
                "1621680",  #Sword and Fairy 4
                "888040",   #Metal Fatigue
                ]:
            ret.add("noforcelgadd")

        if appid in [
                "257420", #Serious Sam 4
                "2021880", #Ara: History Untold
                ]:
            ret.add("hidevggpu")

        if appid in [
                "1977170", #Jusant
                ]:
            ret.add("hideintelgpu")

        if appid in [
                "202990", #Call of Duty: Black Ops II - Multiplayer
                "212910", #Call of Duty: Black Ops II - Zombies
                "499100", #Dark Parables: The Exiled Prince Collector's Edition (499100)
                "1404090", #Trivia Tricks
                "2052410", #WITCH ON THE HOLY NIGHT
                "789910", #Planet of the Apes: Last Frontier
                "1183470", #Imperiums: Greek Wars
                "876340", #VR Slots 3D
                ]:
            ret.add("heapdelayfree")

        if appid in [
                "21980", #Call of Juarez: Bound in Blood
                "553850", #Helldivers 2
                "2055290", #Sonic Colors: Ultimate
                ]:
            ret.add("heapzeromemory")

        if appid in [
                "71230", #Crazy Taxi
                "3328910", #MySims Kingdom
                ]:
            ret.add("heaptopdown")

        if appid in [
                "2630", #Call of Duty 2
                "1060210", #Disaster Report 4: Summer Memories
                "414740", #RAID: World War II
                "201510", #Flatout 3
                "1233880", #Disgaea 4 Complete+
                ]:
            ret.add("nofsync")
            ret.add("noesync")

        if appid in [
                "1237970", #Titanfall 2
                ]:
            for idx, arg in enumerate(sys.argv):
                if '-northstar' in arg:
                    ret.add("northstar")

        if appid in [
                # disable dxvknvapi for titles which dislike it
                "1088850", #Marvel's Guardians of the Galaxy
                "1418100", #Swords of Legends Online
                "2080180", #Go Home Annie Demo
                "1939100", #Go Home Annie
                "435150", #Divinity: Original Sin 2 - Definitive Edition
                "2176900", #Fablecraft
                "2853730", #Skull and Bones
                "1761380", #Otherworld Legends (just to disable nvcuda.dll)
                ]:
            ret.add("disablenvapi")

        if appid in [
                "1808500", #ARC Raiders
                "2073850", #The Finals
                "108710", #Alan Wake
                "202750", #Alan Wake's American Nightmare
                "505170", #Carmageddon: Max Damage
                "255220", #GRID Autosport
                "44350", #GRID 2
                "407810", #Hard Reset Redux
                "233130", #Shadow Warrior
                "2067160", #Simulakros
                "2621010", #Simulakros Demo
                "368500", #Assassin's Creed Syndicate
                "1524630", #KeepUp Survival
                "1233570",
                ]:
            try:
                with open('/proc/modules') as f:
                    drivers = set([line.partition(' ')[0] for line in f.read().splitlines()])
                    if not drivers.intersection({'nvidia', 'nouveau', 'nova'}):
                        ret.add("disablenvapi")
            except OSError:
                ret.add("disablenvapi")


        if appid in [
                "2698940", #The Crew Motorfest
                "2079120", #Warudo
                ]:
            ret.add("hidenvgpu")

        if appid in [
                "2395210", #Tony Hawk's Pro Skater 1 + 2
                "1577120", #The Quarry
                ]:
            ret.add("forcenvapi")

        if appid in [
                "1252330" #Deathloop
                ]:
            ret.add("hideapu")

        if appid in [
                "249610", # Galactic Arms Race
                "287240", # Eterium Demo
                "280200", # Eterium
                "312530", # Duck Game
                "448230", # AsteroidsHD
                "1072860", # Real Scary
                "512490", # Zombie Estate 2
                ]:
            ret.add("fnad3d11")

    #options to also be enabled for prerequisite setup steps
    ret.add("gamedrive")

    if "STEAM_COMPAT_APP_ID" in os.environ:
        appid = os.environ["STEAM_COMPAT_APP_ID"]

        if appid in [
                "247660", #Deadly Premonition: The Director's Cut
                "1026680", #FINAL FANTASY VIII - REMASTERED
                "3513350", #Wuthering Waves
                "3837340", #FINAL FANTASY VII
                "337000", #Deus Ex: Mankind Divided
                ]:
            ret.add("noxalia")

        if appid in [
                "275850", #No Man's Sky
                "2012840", #Portal with RTX
                ]:
            ret.add("nohardwarescheduling")

    if "STORE" in os.environ:
        store = os.environ["STORE"]
        if store in [
            "battlenet",
            "ea",
            "ubisoft",
        ]:
            ret.add("writecopy")

    # hack to force gamedrive compat_config always for umu
    if os.environ.get('UMU_ID', ''):
        ret.add("gamedrive")

    return ret

default_cpu_limit = {
    "19900"     :  "16",  # Far Cry 2
    "298110"    :  "16",  # Far Cry 4
    "20920"     :  "16",  # The Witcher 2: Assassins of Kings Enchanced Edition
    "35130"     :  "16",  # Lara Croft and the Guardian of Light
    "55150"     :  "16",  # Warhammer 40,000: Space Marine
    "204450"    :  "16",  # Call of Juarez: Gunslinger
    "15620"     :  "8",   # Warhammer 40,000: Dawn of War II
    "20570"     :  "8",   # Warhammer 40,000: Dawn of War II - Chaos Rising
    "56400"     :  "8",   # Warhammer 40,000: Dawn of War II - Retribution
    "618970"    :  "4",   # Outcast - Second Contact
    "10150"     :  "8",   # Prototype
    "2229830"   :  "1",   # Command & Conquer and The Covert Operations
    "259170"    :  "8",   # Alone in the Dark (2008)
    "11440"     :  "4",   # DiRT
    "316260"    :  "16",  # Disney Universe
    "286810"    :  "30",  # Hard Truck Apocalypse: Rise of Clans / Ex Machina: Meridian 113
    "70000"     :  "28",  # Dino D-Day
    "115320"    :  "8",   # Prototype 2
    "65540"     :  "16",  # Gothic 1 Classic
    "1038250"   :  "P",   # DIRT 5
}

fex_application_profiles = {
    "292030" : { # The Witcher 3: Wild Hunt
        "setup*": {
            "X87ReducedPrecision": "0"
        }
    }
}

class Session:
    def __init__(self):
        self.log_file = None
        self.env = dict(os.environ)
        self.xrandr_bin = g_proton.xrandr_bin
        self.dlloverrides = {
                "steam.exe": "b", #always use our special built-in steam.exe
                "dotnetfx35.exe": "b", #replace the broken installer, as does Windows
                "dotnetfx35setup.exe": "b",
                "beclient.dll": "b,n",
                "beclient_x64.dll": "b,n",
                "winebth.sys": "d", #disable winebth.sys as it crashes winedevice.exe
        }

        # CW Bug 21737. Locoland executable happens to be steam.exe.
        if os.environ.get("SteamGameId", 0) == "352130":
            del self.dlloverrides["steam.exe"]

        if os.environ.get("SteamGameId", 0) not in ["2767030", "2274200"]:
            self.dlloverrides["opencl"] = "n,d"

        self.compat_config = default_compat_config()
        self.cmdlineappend = []

        if "STEAM_COMPAT_CONFIG" in os.environ:
            config = os.environ["STEAM_COMPAT_CONFIG"]

            while config:
                (cur, _, config) = config.partition(',')
                if cur.startswith("cmdlineappend:"):
                    while comma_escaped(cur):
                        (a, _, c) = config.partition(',')
                        cur = cur[:-1] + ',' + a
                        config = c
                    self.cmdlineappend.append(cur[14:].replace('\\\\','\\'))
                else:
                    self.compat_config.add(cur)

        #turn forcelgadd on by default unless it is disabled in compat config
        if "noforcelgadd" not in self.compat_config:
            self.compat_config.add("forcelgadd")

        appid = os.environ.get("SteamGameId", 0)
        if not appid:
            umu_id = os.environ.get("UMU_ID", "")
            if umu_id.startswith("umu-") and umu_id[4:].isdigit():
                appid = umu_id[4:]

        # These games "support" PS controller input but only provide Xbox icons
        # It's better to remap PS hidraw to xinput to mimic xbox on these games.
        # If we use native PS mappings that the game detects, the mappings are wrong.
        # When forcing xinput and remapping internally, mappings are correct
        # Even then, AC II still needs manual remapping of axby in-game. The rest are ok
        if appid in [
                "15100",   # Assassin's Creed
                "33230",   # Assassin's Creed II
                "260210",  # Assassin's Creed: Liberation HD
                "368500",  # Assassin's Creed Syndicate
                "201870",  # Assassin's Creed: Revelations
                "277590",  # Assassin's Creed Freedom Cry
                "311560",  # Assassin's Creed Rogue
                "289650",  # Assassin's Creed Unity
                "242050",  # Assassin's Creed IV: Black Flag
                "354380",  # Assassin's Creed Chronicles: China
                "359610",  # Assassin's Creed Chronicles: India
                "359600",  # Assassin's Creed Chronicles: Russia
                "582660",  # Black Desert Online
                "814380",  # Sekiro
                "287290",  # Resident Evil Revelations 2
                "1364780",  # Street Fighter 6
                "1446780",  # Monster Hunter Rise
                "345350",  # FINAL FANTASY XIII: Lightning Returns
                ]:
            self.env["PROTON_SONY_HIDRAW_XINPUT"] = "1"

        # These games have perfect DS4 mappings, but do not support DS5/DS5 Edge.
        # In this case we fake a DS4 controller for perfect button mappings and icons
        if appid in [
                "911400",  # Assassin's Creed III / Liberation Remastered
                "812140",  # Assassin's Creed Odyssey
                "582160",  # Assassin's Creed Origins
                "1222140",  # Detroit: Become Human
                "1174180",  # Red Dead Redemption 2
                "1190460",  # Death Stranding
                "1593500",  # God of War (2018)
                "1151640",  # Horizon Zero Dawn Complete Edition
                "1172710",  # Dune Awakening
                "1034860",  # Grandia
                "330390",  # Grandia II
                "3255380",  # Lunar
                "731490",  # Crash Bandicoot N'Sane Trilogy
                "253230",  # A Hat in Time
                "638970",  # Yakuza 0
                "612880",  # Wolfenstein II: The New Colossus
                # Batman Arkham Knight turns out to ship with a flawed libScePad_x64.dll
                # that prevents both the DS4 v1 and v2 from working. Replacing it with
                # one from another game fixed the issue and let both DS4 models work
                # properly. Because this means the game needs to be modded to support
                # the DS4 properly, it's debatable if this entry should make it into the
                # final commit.
                "208650",  # Batman: Arkham Knight
                # The enhanced edition of Little nightmares has full support for the
                # DualSense. This entry is here in case anyone prefers the original and
                # still wants to use the DualSense.
                "424840",  # Little Nightmares (Original)
                "996580",  # Spyro Reignited Trilogy
                # Recommended by rjbs91. I don't have Greedfall, so I would recommend
                # testing it's support; whether it supports the DS4 v2 or only the v1.
                # rjbs91 claims it has proper button mappings and glyphs.
                "606880",  # Greedfall
                "570940",  # Dark Souls Remastered
                ]:
            self.env["PROTON_SONY_DUALSENSE_AS_DUALSHOCK4"] = "1"

        # Some games only support DS4 v1
        if appid in [
                "731490",  # Crash Bandicoot N'Sane Trilogy
                "638970",  # Yakuza 0
                "612880",  # Wolfenstein II: The New Colossus
                "1034860",  # Grandia
                "330390",  # Grandia II
                "3255380",  # Lunar
                ]:
            self.env["PROTON_SONY_DUALSHOCK4_V2_AS_V1"] = "1"

        # These games rely on Steam Input action manifests. Expose XInput through
        # lsteamclient's standalone Steam Input implementation. The fallback detects
        # the current controller layout itself and updates it across hotplug events.
        if appid in [
                "2246340", # Monster Hunter Wilds
                "1151640", # Horizon Zero Dawn Complete Edition
                "2322010", # God of War Ragnarok
                ]:
            self.env["PROTON_SONY_HIDRAW_XINPUT"] = "1"
            self.env["PROTON_STEAMINPUT_FALLBACK"] = "1"

        # Work around quirk caused by our Dynamic exe relocation patch
        if appid in [
                "201870",  # Assassin's Creed: Revelations
                ]:
            self.env["WINE_DISABLE_EXE_ASLR"] = "1"

        # Work around MH Wilds audio device quirk
        if appid in [
                "2246340", # Monster Hunter Wilds
                ]:
            self.env["PROTON_ENABLE_MHWILDS_USB_AUDIO"] = "1"

        # Initialize the DualSense USB audio system, preserve its internal-speaker
        # route, and select the controller through Death Stranding's native BB
        # output setting while keeping the four-channel haptic stream active.
        if appid in [
                "1850570", # Death Stranding Director's Cut
                "3280350", # Death Stranding 2
                ]:
            self.env["PROTON_DEATH_STRANDING_CONTROLLER_EFFECTS"] = "1"

        # Director's Cut does not expose the PS5 environmental-speaker option.
        # Death Stranding 2 has a native in-game setting and must retain it.
        if appid == "1850570":
            self.env["PROTON_DEATH_STRANDING_FORCE_ENVIRONMENT_EFFECTS"] = "1"

        if "PROTON_PIPEWIRE_ALSA_PLUGIN" not in self.env:
            if g_proton.host_pe_arch == "aarch64-windows":
                alsa_arch = "aarch64-linux-gnu"
            else:
                alsa_arch = "x86_64-linux-gnu"
            self.env["PROTON_PIPEWIRE_ALSA_PLUGIN"] = os.path.join(
                    g_proton.lib_dir, alsa_arch, "alsa-lib",
                    "libasound_module_pcm_pipewire.so")

        if "PROTON_CPU_TOPOLOGY" in self.env:
            self.env["WINE_CPU_TOPOLOGY"] = self.env["PROTON_CPU_TOPOLOGY"]
        elif appid in default_cpu_limit:
            self.env["WINE_CPU_TOPOLOGY"] = default_cpu_limit[appid]

        if "WINE_HIDE_AMD_GPU" not in self.env and appid in [
                    "1282690",
                ]:
            self.env["WINE_HIDE_AMD_GPU"] = "1"

        if "WINE_DISABLE_GAMESCOPE_MAX_SIZE_HACK" not in self.env and appid in [
                    "3754990",
                    "3495730"
                ]:
            self.env["WINE_DISABLE_GAMESCOPE_MAX_SIZE_HACK"] = "1"

    def init_wine(self):
        if "HOST_LC_ALL" in self.env and len(self.env["HOST_LC_ALL"]) > 0:
            #steam sets LC_ALL=C to help some games, but Wine requires the real value
            #in order to do path conversion between win32 and host. steam sets
            #HOST_LC_ALL to allow us to use the real value.
            self.env["LC_ALL"] = self.env["HOST_LC_ALL"]
        else:
            self.env.pop("LC_ALL", "")

        # FIXME: temporary workaround to libxkbcommon's current integration
        if "XLOCALEDIR" not in self.env:
            self.env["XLOCALEDIR"] = g_proton.dist_dir + "share/X11/locale"

        # CW-Bug-Id: #23185 Enable the new SDL 2.30 Steam Input integration.
        if "SteamVirtualGamepadInfo_Proton" in self.env and "SteamVirtualGamepadInfo" not in self.env:
            self.env["SteamVirtualGamepadInfo"] = self.env["SteamVirtualGamepadInfo_Proton"]

        if "PROTON_USE_WOW64" not in self.env and "SteamGameId" in self.env:
            if self.env["SteamGameId"] in [
                    "747920",
                    ]:
                self.env["PROTON_USE_WOW64"] = "1"

        self.env.pop("WINEARCH", "")
        if "PROTON_USE_WOW64" in self.env and self.env["PROTON_USE_WOW64"] == "1" and platform.machine() == "x86_64":
            self.env["WINEARCH"] = "wow64"

        if 'ORIG_'+ld_path_var not in os.environ:
            # Allow wine to restore this when calling an external app.
            self.env['ORIG_'+ld_path_var] = os.environ.get(ld_path_var, '')

        if g_proton.host_pe_arch == "aarch64-windows":
            ld_library_path = [
                    g_proton.lib_dir + "aarch64-linux-gnu",
                    g_proton.lib_dir + "x86_64-linux-gnu",
                    g_proton.lib_dir + "i386-linux-gnu",
            ]
        else:
            ld_library_path = [
                    g_proton.lib_dir + "x86_64-linux-gnu",
                    g_proton.lib_dir + "i386-linux-gnu",
            ]
        prepend_to_env_str(self.env, ld_path_var, ':'.join(ld_library_path), ":")

        dllpaths = [g_proton.lib_dir + "vkd3d", g_proton.lib_dir + "wine"]
        if "WINEDLLPATH" in os.environ:
            dllpaths.append(os.environ["WINEDLLPATH"])
        self.env["WINEDLLPATH"] = ':'.join(dllpaths)

        if "STEAM_COMPAT_MEDIA_PATH" in os.environ:
            old_audiofoz_path = os.environ["STEAM_COMPAT_MEDIA_PATH"] + "/audio.foz"
            if file_exists(old_audiofoz_path, follow_symlinks=False):
                os.remove(old_audiofoz_path)
            self.env["MEDIACONV_AUDIO_DUMP_FILE"] = os.environ["STEAM_COMPAT_MEDIA_PATH"] + "/audiov2.foz"
            self.env["MEDIACONV_VIDEO_DUMP_FILE"] = os.environ["STEAM_COMPAT_MEDIA_PATH"] + "/video.foz"

        if "STEAM_COMPAT_TRANSCODED_MEDIA_PATH" in os.environ:
            self.env["MEDIACONV_AUDIO_TRANSCODED_FILE"] = os.environ["STEAM_COMPAT_TRANSCODED_MEDIA_PATH"] + "/transcoded_audio.foz"
            self.env["MEDIACONV_VIDEO_TRANSCODED_FILE"] = os.environ["STEAM_COMPAT_TRANSCODED_MEDIA_PATH"] + "/transcoded_video.foz"

        if os.environ.get("PROTON_MEDIACONV_NO_VIDEO",
            "1" if os.environ.get("SteamGameId", 0) in (
                "283640", # Salt and Sanctuary
                "455490", # Don't Die Dateless, Dummy!
                "787810", # Rogue Heroes: Ruins of Tasos
                "1199570", # Rogue Heroes: Ruins of Tasos Demo
                "1491460", # Tor Eternum
                "1588990", # Tor Eternum Demo
                "1895130", # Darza's Dominion
            ) else "0") != "0":
            self.env["MEDIACONV_BLANK_VIDEO_FILE"] = g_proton.media_dir + "blank.mka"
        else:
            self.env["MEDIACONV_BLANK_VIDEO_FILE"] = g_proton.media_dir + "blank.mkv"
        self.env["MEDIACONV_BLANK_AUDIO_FILE"] = g_proton.media_dir + "blank.ptna"

        self.env["ESPEAK_DATA_PATH"] = g_proton.dist_dir + "share"

        prepend_to_env_str(self.env, "PATH", g_proton.bin_dir, ":")

    def check_environment(self, env_name, config_name):
        if env_name not in self.env:
            return False
        if nonzero(self.env[env_name]):
            self.compat_config.add(config_name)
        else:
            self.compat_config.discard(config_name)
        return True

    def try_log_slr_versions(self):
        try:
            if "PRESSURE_VESSEL_RUNTIME_BASE" in self.env:
                with open(self.env["PRESSURE_VESSEL_RUNTIME_BASE"] + "/VERSIONS.txt", "r") as f:
                    for line in f:
                        line = line.strip()
                        if len(line) > 0 and not line.startswith("#"):
                            cleaned = line.split("#")[0].strip().replace("\t", " ")
                            split = cleaned.split(" ", maxsplit=1)
                            self.log_file.write(split[0] + ": " + split[1] + "\n")
        except (OSError, IOError, TypeError, KeyError):
            pass

    def setup_logging(self, *, append_forever):
        basedir = self.env.get("PROTON_LOG_DIR", os.environ["HOME"])

        if append_forever:
            #SteamGameId is not always available
            lfile_path = basedir + "/steam-proton.log"
        else:
            if "SteamGameId" not in os.environ:
                return False

            lfile_path = basedir + "/steam-" + os.environ["SteamGameId"] + ".log"

            if file_exists(lfile_path, follow_symlinks=False):
                os.remove(lfile_path)

        makedirs(basedir)
        self.log_file = open(lfile_path, "a")
        return True

    def log_enabled_for(self, target: str, default_value: bool = False) -> bool:
        log_list = self.env["PROTON_LOG"]
        if nonzero(log_list):
            for entry in log_list.split(','):
                if entry[1:] == target:
                    if entry.startswith('+'):
                        return True
                    elif entry.startswith('-'):
                        return False
                    break
            return default_value # logging enabled, return specified default when not found
        return False # logging disabled, all false

    def generate_fex_app_config(self):
        """
        Translate some environment variables into FEX config which is in files.
        """
        app_config = {
            "Config": {},
            "ThunksDB": {}
        }

        # appinfo based environment variable as default
        try:
            app_config["Config"]["TSOEnabled"] = self.env['STEAM_FEX_TSOENABLED']
        except (KeyError, ValueError):
            pass
        try:
            app_config["Config"]["Multiblock"] = self.env['STEAM_FEX_MULTIBLOCK']
        except (KeyError, ValueError):
            pass

        # if user has specified an override, take those values
        try:
            config_env = self.env['STEAM_COMPAT_FEX_CONFIG']
            if config_env:
                app_config["Config"]["TSOEnabled"] = "1" if ("TSOEnabled:1" in config_env) else "0"
                app_config["Config"]["Multiblock"] = "1" if ("Multiblock:1" in config_env) else "0"
        except KeyError:
            pass

        if "PROTON_LOG" in self.env:
            app_config["Config"]["SilentLog"] = "0" if self.log_enabled_for("fex", True) else "1"

        if "SteamGameId" in os.environ and os.environ["SteamGameId"] in fex_application_profiles:
            try:
                app_config["AppOverrides"] = fex_application_profiles[os.environ["SteamGameId"]]
            except (KeyError, ValueError):
                pass

        return app_config

    def get_primary_monitor(self):
        try:
            result = subprocess.run(
                [self.xrandr_bin],
                check=True,
                capture_output=True,
                text=True,
            )
        except FileNotFoundError:
            print("Error: xrandr is not installed or not in PATH.", file=sys.stderr)
            return None
        except subprocess.CalledProcessError as e:
            print(f"Error: failed to run xrandr: {e}", file=sys.stderr)
            return None

        for line in result.stdout.splitlines():
            # Example:
            # HDMI-A-1 connected primary 3840x2160+3840+0 ...
            match = re.match(r"^(\S+)\s+connected\s+primary\b", line)
            if match:
                return match.group(1)

        return None

    def init_session(self, update_prefix_files):
        self.env["WINEPREFIX"] = g_compatdata.prefix_dir

        #load environment overrides
        used_user_settings = {}
        if file_exists(g_proton.user_settings_file, follow_symlinks=True):
            try:
                import user_settings # pyright: ignore [reportMissingImports]
                for key, value in user_settings.user_settings.items():
                    if key not in self.env:
                        self.env[key] = value
                        used_user_settings[key] = value
            except Exception:
                log("************************************************")
                log("THERE IS AN ERROR IN YOUR user_settings.py FILE:")
                log("%s" % sys.exc_info()[1])
                log("************************************************")

        if "PROTON_LOG" in self.env and nonzero(self.env["PROTON_LOG"]):
            self.env.setdefault("WINEDEBUG", "+timestamp,+pid,+tid,+seh,+unwind,+threadname,+debugstr,+loaddll,+mscoree")
            self.env.setdefault("DXVK_LOG_LEVEL", "info")
            self.env.setdefault("DXVK_NVAPI_LOG_LEVEL", "info")
            self.env.setdefault("VKD3D_DEBUG", "warn")
            self.env.setdefault("VKD3D_SHADER_DEBUG", "fixme")
            self.env.setdefault("WINE_MONO_TRACE", "E:System.NotImplementedException")

            if self.env["PROTON_LOG"] != "1":
                append_to_env_str(self.env, "WINEDEBUG", self.env["PROTON_LOG"], ",")

        #for performance, logging is disabled by default; override with user_settings.py
        self.env.setdefault("WINEDEBUG", "-all")
        self.env.setdefault("DXVK_LOG_LEVEL", "none")
        self.env.setdefault("VKD3D_DEBUG", "none")
        self.env.setdefault("VKD3D_SHADER_DEBUG", "none")

        # Enable wine-nvml by default on Nvidia (experimental)
        if utilities.is_driver_loaded({'nvidia'}):
            self.compat_config.add("nvml")

        if "wined3d11" in self.compat_config:
            self.compat_config.add("wined3d")

        self.check_environment("PROTON_USE_WOW64", "wow64")
        if not self.check_environment("PROTON_USE_WINED3D", "wined3d"):
            self.check_environment("PROTON_USE_WINED3D11", "wined3d")
        self.check_environment("PROTON_NO_WM_DECORATION", "nowmdecoration")
        self.check_environment("PROTON_DXVK_D3D8", "dxvkd3d8")
        self.check_environment("PROTON_NO_D3D11", "nod3d11")
        self.check_environment("PROTON_NO_D3D10", "nod3d10")
        self.check_environment("PROTON_NO_ESYNC", "noesync")
        self.check_environment("PROTON_NO_FSYNC", "nofsync")
        self.check_environment("PROTON_FORCE_LARGE_ADDRESS_AWARE", "forcelgadd")
        self.check_environment("PROTON_OLD_GL_STRING", "oldglstr")
        self.check_environment("PROTON_HIDE_NVIDIA_GPU", "hidenvgpu")
        self.check_environment("PROTON_HIDE_VANGOGH_GPU", "hidevggpu")
        self.check_environment("PROTON_HIDE_INTEL_GPU", "hideintelgpu")
        self.check_environment("PROTON_SET_GAME_DRIVE", "gamedrive")
        self.check_environment("PROTON_SET_STEAM_DRIVE", "steamdrive")
        self.check_environment("PROTON_NO_XIM", "noxim")
        self.check_environment("PROTON_HEAP_DELAY_FREE", "heapdelayfree")
        self.check_environment("PROTON_HEAP_ZERO_MEMORY", "heapzeromemory")
        self.check_environment("PROTON_DISABLE_NVAPI", "disablenvapi")
        self.check_environment("PROTON_FORCE_NVAPI", "forcenvapi")
        self.check_environment("PROTON_NVIDIA_LIBS", "nvidialibs")
        self.check_environment("PROTON_NVIDIA_LIBS_NO_32BIT", "nvidialibsno32")
        self.check_environment("PROTON_NVIDIA_NVCUDA", "nvcuda")
        self.check_environment("PROTON_NVIDIA_NVENC", "nvenc")
        self.check_environment("PROTON_NVIDIA_NVML", "nvml")
        self.check_environment("PROTON_NVIDIA_NVOPTIX", "nvoptix")
        self.check_environment("PROTON_HIDE_APU", "hideapu")
        self.check_environment("PROTON_ENABLE_WAYLAND", "wayland")
        self.check_environment("PROTON_USE_WAYLAND", "wayland")
        self.check_environment("PROTON_PREFER_SDL", "sdlinput")
        self.check_environment("PROTON_USE_SDL", "sdlinput")

        # Sony controllers need hidraw to feed the XInput-backed Steam Input
        # fallback. Native Xbox controllers continue to use their XInput slot.
        if (self.env.get("PROTON_STEAMINPUT_FALLBACK") == "1" or
                self.env.get("PROTON_STEAMINPUT_XINPUT_FALLBACK") == "1"):
            self.compat_config.discard("sdlinput")
            self.env.pop("PROTON_DISABLE_HIDRAW", None)

        self.check_environment("PROTON_NATIVE_AGS", "nativeags")
        self.check_environment("PROTON_FSR3_UPGRADE", "fsr3")
        self.check_environment("PROTON_FSR4_UPGRADE", "fsr4")
        self.check_environment("PROTON_FSR4_RDNA3_UPGRADE", "fsr4rdna3")
        self.check_environment("PROTON_FSR4_INDICATOR", "fsr4hud")
        self.check_environment("PROTON_DLSS_UPGRADE", "dlss")
        self.check_environment("PROTON_DLSS_INDICATOR", "dlsshud")
        self.check_environment("PROTON_XESS_UPGRADE", "xess")
        self.check_environment("PROTON_USE_OPTISCALER", "optiscaler")

        self.check_environment("PROTON_NATIVE_AGS", "nativeags")
        self.check_environment("PROTON_ENABLE_HDR", "hdr")
        self.check_environment("PROTON_USE_HDR", "hdr")
        self.check_environment("PROTON_NO_NTSYNC", "nontsync")
        self.check_environment("PROTON_USE_WRITECOPY", "writecopy")

        if "nontsync" in self.compat_config:
            self.env.pop("WINENTSYNC", "")
        else:
            self.env["WINENTSYNC"] = "1"

        if "noesync" in self.compat_config:
            self.env.pop("WINEESYNC", "")
            self.env["WINEESYNC"] = "0"
        else:
            self.env["WINEESYNC"] = "1"

        if "nowmdecoration" in self.compat_config:
            self.env["WAYLANDDRV_SSD"] = "0"
            self.env["WINE_NO_WM_DECORATION"] = "1"

        if "nvidialibs" in self.compat_config:
            self.compat_config.add("nvcuda")
            self.compat_config.add("nvenc")
            self.compat_config.add("nvml")
            self.compat_config.add("nvoptix")

        self.check_environment("DXVK_NVAPI_VKREFLEX", "vkreflex")
        if "vkreflex" in self.compat_config and "disablenvapi" not in self.compat_config and utilities.is_driver_loaded({'nvidia'}):
            append_to_env_str(self.env, "VK_IMPLICIT_LAYER_PATH", g_proton.dist_dir + "share/dxvk-nvapi-vkreflex-layer/implicit_layer.d", ":")

        self.check_environment("LOW_LATENCY_LAYER", "lowlatencylayer")
        if "lowlatencylayer" in self.compat_config:
            append_to_env_str(self.env, "VK_IMPLICIT_LAYER_PATH", g_proton.dist_dir + "share/low_latency_layer/implicit_layer.d", ":")

        self.check_environment("ENABLE_VKBASALT", "vkbasalt")
        if "vkbasalt" in self.compat_config:
            append_to_env_str(self.env, "VK_IMPLICIT_LAYER_PATH", g_proton.dist_dir + "share/vkbasalt/implicit_layer.d", ":")

        self.check_environment("PYROVEIL", "pyroveil")
        if "pyroveil" in self.compat_config:
            append_to_env_str(self.env, "VK_IMPLICIT_LAYER_PATH", g_proton.dist_dir + "share/pyroveil/implicit_layer.d", ":")
            pyroveil_config = self.env.get("PYROVEIL_CONFIG", "")
            if pyroveil_config:
                self.env["PYROVEIL_CONFIG"] = pyroveil_config if os.path.isabs(pyroveil_config) else g_proton.dist_dir + "share/pyroveil/hacks/" + pyroveil_config

        if "nofsync" in self.compat_config:
            self.env.pop("WINEFSYNC", "")
            self.env["WINEFSYNC"] = "0"
        else:
            self.env["WINEFSYNC"] = "1"

        if "oldglstr" in self.compat_config:
            #mesa override
            self.env["MESA_EXTENSION_MAX_YEAR"] = "2003"
            #nvidia override
            self.env["__GL_ExtensionStringVersion"] = "17700"

        if os.environ.get("SteamGameId", 0) in [
                "661920", #Claybook
                "558260", #Gravel
                "386360", #SMITE
                "487720", #Agony
                "879420", #Agony UNRATED
                "649950", #Ashen
                "1150080", #Azur Lane: Crosswave
                "463150", #BARRIER X
                "420290", #Blackwake
                "1092660", #Blair Witch
                "1052070", #Burning Daylight
                "399810", #Call of Cthulhu
                "967390", #Chronos: Before the Ashes
                "968870", #Close to the Sun
                "544920", #Darwin Project
                "1055610", #Deep Space Battle Simulator
                "682990", #Drug Dealer Simulator
                "551770", #ECHO
                "392110", #ENDLESS Space 2
                "447020", #Farming Simulator 17
                "834280", #Fishing Sim World: Pro Tour
                "890880", #FROSTBITE: Deadly Climate
                "433530", #Heliborne - Enhanced Edition
                "521890", #Hello Neighbor
                "783170", #INSOMNIA: The Ark
                "1195460", #Last Year
                "1029890", #Layers of Fear 2 (2019)
                "535850", #Micro Machines World Series
                "711750", #Monster Energy Supercross - The Official Videogame
                "882020", #Monster Energy Supercross - The Official Videogame 2
                "824280", #Monster Jam Steel Titans
                "775900", #MotoGP18
                "415200", #Motorsport Manager
                "748360", #MY HERO ONE'S JUSTICE
                "1058450", #MY HERO ONE'S JUSTICE 2
                "556180", #Mysterium: A Psychic Clue Game
                "561600", #MXGP3 - The Official Motocross Videogame
                "798290", #MXGP PRO
                "366870", #Narcosis
                "485030", #PLANET ALPHA
                "469610", #Rick and Morty: Virtual Rick-ality
                "759740", #RIDE 3
                "1342260", #SAMURAI SHODOWN
                "425670", #Seraph
                "1096570", #SONG OF HORROR COMPLETE EDITION
                "492230", #Space Hulk: Tactics
                "996580", #Spyro Reignited Trilogy
                "437630", #State of Mind
                "442780", #STRAFE: Gold Edition
                "433100", #The Town of Light
                "406970", #The Uncertain: Last Quiet Day
                "451520", #theBlu: Season 1
                "1237970", #Titanfall® 2
                "1051200", #Trover Saves the Universe
                "285190", #Warhammer 40,000: Dawn of War III
                "1133320", #Westworld Awakening
                ]:
            self.env["OPENSSL_ia32cap"] = "~0x20000000"

        if os.environ.get("SteamGameId", 0) in [
                "500810", #Arcanum
                "4249100", #Resident Evil (1996)
                "4249110", #Resident Evil 2 (1998)
                "4249130", #Dino Crisis
                "4249150", #Breath of Fire IV
                ]:
            self.dlloverrides["ddraw"] = "n,b"

        # CW Bug 26050
        if os.environ.get("SteamGameId", 0) == "3780660":
            self.dlloverrides["dinput"] = "n,b"

        # CW Bug 26133
        if os.environ.get("SteamGameId", 0) == "2471120":
            self.dlloverrides["winmm"] = "n,b"

        # CW Bug 26376
        if os.environ.get("SteamGameId", 0) == "1928420":
            self.dlloverrides["gameinput"] = "d"

        if "PROTON_LIMIT_RESOLUTIONS" not in self.env:
            if os.environ.get("SteamGameId", 0) in [
                    "39540", #SpellForce: Platinum Edition
                    ]:
                self.env["PROTON_LIMIT_RESOLUTIONS"] = "16"
            elif os.environ.get("SteamGameId", 0) in [
                    "524220", #NieR: Automata
                    "814380", #Sekiro: Shadows Die Twice
                    "374320", #DARK SOULS III
                    "357190", #Ultimate Marvel vs Capcom 3
                    "730830", #Escape from Monkey Island
                    "229480", #Dungeons & Dragons: Chronicles of Mystara
                    ]:
                self.env["PROTON_LIMIT_RESOLUTIONS"] = "32"

        if "PROTON_SPOOF_STEAMINPUT_VIDPID" not in self.env:
            if os.environ.get("SteamGameId", 0) in [
                    "939960", #Far Cry New Dawn
                    "250900", #The Binding of Isaac: Rebirth
                    "297860", #Split/Second
                    ]:
                self.env["PROTON_SPOOF_STEAMINPUT_VIDPID"] = "1"

        if "forcelgadd" in self.compat_config:
            self.env["WINE_LARGE_ADDRESS_AWARE"] = "1"
        else:
            if "noforcelgadd" in self.compat_config:
                self.env["WINE_LARGE_ADDRESS_AWARE"] = "0"

        if "heapdelayfree" in self.compat_config:
            self.env["WINE_HEAP_DELAY_FREE"] = "1"

        if "heapzeromemory" in self.compat_config:
            self.env["WINE_HEAP_ZERO_MEMORY"] = "1"

        if "heaptopdown" in self.compat_config:
            self.env["WINE_HEAP_TOP_DOWN"] = "1"

        if "vkd3dbindlesstb" in self.compat_config:
            append_to_env_str(self.env, "VKD3D_CONFIG", "force_bindless_texel_buffer", ",")

        if "northstar" in self.compat_config:
            append_to_env_str(self.env, "WINEDLLOVERRIDES", "wsock32=n,b", ";")

        if "vkd3dfl12" in self.compat_config:
            if "VKD3D_FEATURE_LEVEL" not in self.env:
                self.env["VKD3D_FEATURE_LEVEL"] = "12_0"

        if "hidevggpu" in self.compat_config:
            self.env["WINE_HIDE_VANGOGH_GPU"] = "1"

        if "hidenvgpu" in self.compat_config and "forcenvapi" not in self.compat_config:
            self.env["WINE_HIDE_NVIDIA_GPU"] = "1"

        if "hideintelgpu" in self.compat_config:
            self.env["WINE_HIDE_INTEL_GPU"] = "1"

        if "hideapu" in self.compat_config:
            self.env["WINE_HIDE_APU"] = "1"

        if "usenativexinput13" in self.compat_config:
            self.dlloverrides["xinput1_3"] = "n"

        if "disablelibglesv2" in self.compat_config:
            self.dlloverrides["libglesv2"] = "d"

        if "nativeags" in self.compat_config:
            self.dlloverrides["atiadlxx"] = "b"
            self.dlloverrides["atidxx64"] = "b"
            self.dlloverrides["amd_ags_x64"] = "n"

        if "nomfdxgiman" in self.compat_config:
            self.env["WINE_DO_NOT_CREATE_DXGI_DEVICE_MANAGER"] = "1"

        if "noopwr" in self.compat_config:
            self.env["WINE_DISABLE_VULKAN_OPWR"] = "1"

        if "noopwrx11" in self.compat_config and "wayland" not in self.compat_config:
            self.env["WINE_DISABLE_VULKAN_OPWR"] = "1"

        if "PROTON_USE_XALIA" not in self.env:
            if "noxalia" in self.compat_config:
                self.env["PROTON_USE_XALIA"] = "0"
            else:
                self.env["PROTON_USE_XALIA"] = "1"
                if "xalia" not in self.compat_config:
                    self.env["XALIA_SUPPORTED_ONLY"] = "1"

        if "nohardwarescheduling" in self.compat_config and "WINE_DISABLE_HARDWARE_SCHEDULING" not in self.env:
            self.env["WINE_DISABLE_HARDWARE_SCHEDULING"] = "1"

        if "writecopy" in self.compat_config:
            self.env["WINE_SIMULATE_WRITECOPY"] = "1"

        if "PROTON_CRASH_REPORT_DIR" in self.env:
            self.env["WINE_CRASH_REPORT_DIR"] = self.env["PROTON_CRASH_REPORT_DIR"]

        if "sdlinput" in self.compat_config:
            self.env["PROTON_DISABLE_HIDRAW"] = "1"
            self.env["PROTON_NO_STEAMINPUT"] = "1"
            if "SDL_GAMECONTROLLER_IGNORE_DEVICES" in self.env:
                del self.env["SDL_GAMECONTROLLER_IGNORE_DEVICES"]

        if "hdr" in self.compat_config:
            self.env["DXVK_HDR"] = "1"

        if "fnad3d11" in self.compat_config and "FNA3D_FORCE_DRIVER" not in self.env:
            self.env["FNA3D_FORCE_DRIVER"] = "D3D11"

        # igdext is loaded either using the LoadLibraryExW hack on 1.3 or lower
        # or using the INTC_ALT_DRIVER_EXTENSIONS_PATH on 2.0 or newer
        # TODO: Load it through driver store data like it is on windows
        # TODO: D3D11 has a different loading mechanism because why not
        self.env["INTC_ALT_DRIVER_EXTENSIONS_PATH"] = "C:\\Windows\\System32"


        # PROTON_DISABLE_HIDRAW workarounds
        if (os.environ.get("SteamGameId", 0) == "2322010" and    # God of War: Ragnarok
            os.environ.get("SteamDeck", 0) == "1"):
            # Disable hidraw for Sony DualShock and DualSense controllers.
            self.env["PROTON_DISABLE_HIDRAW"] = "0x054C/0x05C4,0x054C/0x09CC,0x054C/0x0BA0,0x054C/0x0CE6,0x054C/0x0DF2"


        if "__GLVND_DISALLOW_PATCHING" not in self.env:
            self.env["__GLVND_DISALLOW_PATCHING"] = "1"

        if (os.environ.get("SteamGameId", 0) == "1183470"): # Imperiums: Greek Wars
            self.env.setdefault("WINE_MONO_HIDETYPES", "1")
        self.env.setdefault("WINE_MONO_HIDETYPES", "0")

        # Proton-EM custom options:

        # Don't use wayland backend when WAYLAND_DISPLAY is not set
        if "wayland" in self.compat_config and "WAYLAND_DISPLAY" in self.env:
            # Make the temporary Steam overlay bridge discoverable only when
            # Steam actually injected its overlay and the X11 path remains
            # available. win32u bootstraps the selected layer for launchers.
            overlay_preload = ":".join((
                self.env.get("LD_PRELOAD", ""),
                self.env.get("WINE_LD_PRELOAD", ""),
            ))
            winex11_order = self.dlloverrides.get("winex11.drv")
            winex11_available = (
                winex11_order is None or
                "b" in winex11_order.lower() or
                "n" in winex11_order.lower()
            )
            if ("gameoverlayrenderer.so" in overlay_preload and
                    winex11_available and
                    not nonzero(self.env.get("DISABLE_WINE_WAYLAND_STEAM_OVERLAY_LAYER", "0"))):
                self.env["WINE_WAYLAND_STEAM_OVERLAY_LAYER"] = "1"
                append_to_env_str(
                    self.env,
                    "VK_IMPLICIT_LAYER_PATH",
                    g_proton.dist_dir + "share/steam-overlay-wayland/implicit_layer.d",
                    ":")
            # Set primary monitor if given
            if "PROTON_WAYLAND_MONITOR" in self.env:
                self.env["WAYLANDDRV_PRIMARY_MONITOR"] = self.env["PROTON_WAYLAND_MONITOR"]
            # Try to determine the primary monitor if not given.
            if "WAYLANDDRV_PRIMARY_MONITOR" not in self.env:
                primary_monitor = self.get_primary_monitor()
                if primary_monitor:
                    self.env["WAYLANDDRV_PRIMARY_MONITOR"] = primary_monitor
            # Select Wayland explicitly while keeping X11 available for
            # per-process compatibility fallbacks used by launcher UIs.
            self.env["WINE_GRAPHICS_DRIVER"] = "wayland"
            self.dlloverrides["winewayland.drv"] = "b"
            # This is required for OpenGL to work on winewayland
            self.env["WINE_USE_EGL"] = "1"
            # FSHack is not supported on winewayland (yet)
            self.env["WINE_DISABLE_FULLSCREEN_HACK"] = "1"
            # Enable the move hack
            self.env.setdefault("WINE_MOVE_HACK", "1")
            # It is not possible for winewayland to support xalia since
            # there is no way to position toplevel surfaces dynamically in wayland
            self.env["PROTON_USE_XALIA"] = "0"
            # Steam advertises its per-game virtual controller through these
            # variables. Keep that device available when the game's Steam Input
            # toggle is enabled: the overlay controller UI consumes its translated
            # XInput stream. Otherwise suppress the desktop virtual controller and
            # leave the game's native controller path active.
            steam_input_enabled = (
                ("SteamVirtualGamepadInfo" in self.env and
                 nonzero(self.env["SteamVirtualGamepadInfo"])) or
                ("SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD" in self.env and
                 nonzero(self.env["SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD"]))
            )
            if "PROTON_NO_STEAMINPUT" not in self.env:
                self.env["PROTON_NO_STEAMINPUT"] = "0" if steam_input_enabled else "1"
            # Disable other steam input related stuff
            if nonzero(self.env["PROTON_NO_STEAMINPUT"]):
                # When steam input is disabled we need the ignored controllers to work again
                if "SDL_GAMECONTROLLER_IGNORE_DEVICES" in self.env:
                    del self.env["SDL_GAMECONTROLLER_IGNORE_DEVICES"]
                # Some other steam input related options we need to remove
                if "SteamVirtualGamepadInfo" in self.env:
                    del self.env["SteamVirtualGamepadInfo"]
                if "SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD" in self.env:
                    del self.env["SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD"]
            # FIXME: temporary workaround for libxkbcommon's current integration
            self.env.setdefault("XLOCALEDIR", g_proton.dist_dir + "share/X11/locale")
            # Keep DISPLAY available for processes that explicitly fall back to
            # XWayland. WINE_GRAPHICS_DRIVER still selects native Wayland for
            # the desktop and every process without such a fallback.

        # Use SDL backend for inputs instead of hidraw/Steam Input.
        if "sdlinput" in self.compat_config:
            self.env["PROTON_DISABLE_HIDRAW"] = "1"
            self.env["PROTON_NO_STEAMINPUT"] = "1"
            if "SDL_GAMECONTROLLER_IGNORE_DEVICES" in self.env:
                del self.env["SDL_GAMECONTROLLER_IGNORE_DEVICES"]
            if not ("PROTON_EMULATE_STEAMINPUT" in self.env and nonzero(self.env["PROTON_EMULATE_STEAMINPUT"])):
                if "SteamVirtualGamepadInfo" in self.env:
                    del self.env["SteamVirtualGamepadInfo"]
                if "SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD" in self.env:
                    del self.env["SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD"]

        if (os.environ.get("SteamGameId", 0) == "1183470"): # Imperiums: Greek Wars
            self.env.setdefault("WINE_MONO_HIDETYPES", "1")

        # NVIDIA software may check for the "DriverStore" by querying the
        # NGXCore\NGXPath registry key via `D3DDDI_QUERYREGISTRY_SERVICEKEY` for
        # a given adapter. In the case where this path cannot be found, the
        # `NVIDIA_WINE_DLL_DIR` environment variable is read as a fallback.
        #
        # TODO: Add support for populating NGXCore\NGXPath so we can remove the
        # NGX copies done in setup_prefix(), and this environment variable.
        self.nvidia_wine_dll_dir = find_nvidia_wine_dll_dir()
        if self.nvidia_wine_dll_dir:
            self.env["NVIDIA_WINE_DLL_DIR"] = self.nvidia_wine_dll_dir

        if "PROTON_LOG" in self.env and nonzero(self.env["PROTON_LOG"]):
            if self.setup_logging(append_forever=False):
                self.log_file.write("======================\n")
                with open(g_proton.version_file, "r") as f:
                    self.log_file.write("Proton: " + f.readline().strip() + "\n")
                if "SteamGameId" in self.env:
                    self.log_file.write("SteamGameId: " + self.env["SteamGameId"] + "\n")
                self.log_file.write("Command: " + str(sys.argv[2:] + self.cmdlineappend) + "\n")
                self.log_file.write("Options: " + str(self.compat_config) + "\n")

                self.try_log_slr_versions()

                try:
                    uname = os.uname()
                    kernel_version = f"{uname.sysname} {uname.release} {uname.version} {uname.machine}"
                except OSError:
                    kernel_version = "unknown"

                self.log_file.write(f"Kernel: {kernel_version}\n")
                self.log_file.write("Language: LC_ALL " + str(self.env.get("HOST_LC_ALL", None)) +
                                    ", LC_MESSAGES " + str(self.env.get("LC_MESSAGES", None)) +
                                    ", LC_CTYPE " + str(self.env.get("LC_CTYPE", None)) + "\n")
                self.log_file.write("PATH: " + str(self.env.get("PATH", None)) + "\n")

                #dump some important variables into the log header
                for var in ["WINEDLLOVERRIDES", "WINEDEBUG"]:
                    if var in os.environ:
                        self.log_file.write("System " + var + ": " + os.environ[var] + "\n")
                    if var in used_user_settings:
                        self.log_file.write("User settings " + var + ": " + used_user_settings[var] + "\n")
                    if var in self.env:
                        self.log_file.write("Effective " + var + ": " + self.env[var] + "\n")

                # check for low fd limit
                _soft_limit, hard_limit = resource.getrlimit(resource.RLIMIT_NOFILE)
                if hard_limit < 524288:
                    self.log_file.write(f"WARNING: Low file descriptor limit: {hard_limit} (see https://github.com/ValveSoftware/Proton/wiki/File-Descriptors)\n")

                if os.path.exists("/proc/sys/vm/max_map_count"):
                    with open("/proc/sys/vm/max_map_count", "r") as f:
                        max_map_count = int(f.read())
                        if max_map_count < 1048576:
                            self.log_file.write(f"WARNING: Low /proc/sys/vm/max_map_count: {max_map_count} will prevent some games from working\n")

                utilities.log_environment(self.env, self.log_file)
                self.log_file.write("======================\n")
                self.log_file.flush()
            else:
                self.env["WINEDEBUG"] = "-all"

        if "PROTON_REMOTE_DEBUG_CMD" in self.env:
            self.remote_debug_cmd = shlex.split(self.env["PROTON_REMOTE_DEBUG_CMD"])
        else:
            self.remote_debug_cmd = None

        if update_prefix_files:
            g_compatdata.setup_prefix()

        if "fsr4hud" in self.compat_config:
            self.env["FSR_WATERMARK"] = "1"
            self.env["FSR_FG_WATERMARK"] = "1"

        if "dlsshud" in self.compat_config:
            self.env["DXVK_NVAPI_SET_NGX_DEBUG_OPTIONS"] = "DLSSIndicator=1024,DLSSGIndicator=2,"
        else:
            self.env.setdefault("DXVK_NVAPI_SET_NGX_DEBUG_OPTIONS", "DLSSIndicator=0,DLSSGIndicator=0,")

        if "nod3d11" in self.compat_config:
            self.dlloverrides["d3d11"] = ""
            if "dxgi" in self.dlloverrides:
                del self.dlloverrides["dxgi"]

        if "nod3d10" in self.compat_config:
            self.dlloverrides["d3d10_1"] = ""
            self.dlloverrides["d3d10"] = ""
            self.dlloverrides["dxgi"] = ""

        if "nativevulkanloader" in self.compat_config:
            self.dlloverrides["vulkan-1"] = "n"

        if "disablenvapi" not in self.compat_config or "forcenvapi" in self.compat_config:
            self.env["DXVK_ENABLE_NVAPI"] = "1"

        if "forcenvapi" in self.compat_config:
            self.env["DXVK_NVAPI_ALLOW_OTHER_DRIVERS"] = "1"
            self.env["DXVK_NVAPI_DRIVER_VERSION"] = "99999"
            self.env["WINE_HIDE_AMD_GPU"] = "1"

        if not ("WINEDLLOVERRIDES" in g_session.env and "atiadlxx" in g_session.env["WINEDLLOVERRIDES"]) and "SteamAppId" in os.environ:
            if os.environ["SteamAppId"] in [
                    "2767030",
                ]:
                g_session.dlloverrides["atiadlxx"] = "b"

        if not ("PROTON_LIMIT_ADDRESS_SPACE" in g_session.env) and "SteamAppId" in os.environ:
            if os.environ["SteamAppId"] in [
                    "1282270",
                    "2963870",
                ]:
                self.env["PROTON_LIMIT_ADDRESS_SPACE"] = "1"

        s = ""
        for dll in self.dlloverrides:
            setting = self.dlloverrides[dll]
            if len(s) > 0:
                s = s + ";" + dll + "=" + setting
            else:
                s = dll + "=" + setting
        append_to_env_str(self.env, "WINEDLLOVERRIDES", s, ";")

        if platform.machine() == 'aarch64':
            if os.environ.get("SteamGameId", 0) == "1167630": # Teardown
                # https://github.com/microsoft/mimalloc/issues/958
                self.env["MIMALLOC_DISABLE_REDIRECT"] = "1"

            if not 'FEX_APP_CONFIG' in self.env:
                # custom per-app config driven by Steam env vars
                app_config = self.generate_fex_app_config()
                with open(g_compatdata.fex_config_file, 'w') as f:
                    f.write(json.dumps(app_config, indent=2))
                self.env['FEX_APP_CONFIG'] = g_compatdata.fex_config_file

            self.env["FEX_APP_CONFIG_LOCATION"] = os.path.join(g_proton.dist_dir, "share/fex-emu/")

    def run_proc(self, args, local_env=None):
        if local_env is None:
            local_env = self.env
        return subprocess.call(args, env=local_env, stderr=self.log_file, stdout=self.log_file)

    def run(self):
        if shutil.which('steam-runtime-launcher-interface-0') is not None:
            adverb = ['steam-runtime-launcher-interface-0', 'proton']
        else:
            adverb = []

        if self.remote_debug_cmd:
            remote_debug_cmd = self.remote_debug_cmd
            if not os.path.isabs(remote_debug_cmd[0]):
                remote_debug_cmd[0] = g_proton.path(remote_debug_cmd[0])
            remote_debug_proc = subprocess.Popen([g_proton.wine_bin] + self.remote_debug_cmd,
                                                 env=self.env, stderr=self.log_file, stdout=self.log_file)
        else:
            remote_debug_proc = None

        # CoD: Black Ops 3 workaround
        if os.environ.get("SteamGameId", 0) in [
                    "311210",   # CoD: Black Ops 3
                    "1985810",  # CoD: Black Ops Cold War
                    "1549250",  # Undecember
                ]:
            argv = [g_proton.wine_bin, "c:\\Program Files (x86)\\Steam\\steam.exe"]
        # Don't use steam if it's not a steam game
        # Prevent this warning for non-steam games:
        # [S_API FAIL] SteamAPI_Init() failed; no appID found.
        # Either launch the game from Steam, or put the file steam_appid.txt containing the correct appID in your game folder.
        elif "UMU_ID" in os.environ and os.environ.get("UMU_USE_STEAM", "0") != "1":
            if len(sys.argv) >= 3 and sys.argv[2].startswith('/'):
                log(sys.argv[2])
                log("Executable is a unix path, launching with 'umu.exe'.")
                if g_proton.host_pe_arch == "x86_64-windows":
                    #run with winepreloader directly to avoid restart through start.exe
                    self.env["WINELOADERNOEXEC"] = "1"
                    argv = [g_proton.lib_dir + "/wine/x86_64-unix/wine-preloader", g_proton.lib_dir + "/wine/x86_64-unix/wine", "c:\\windows\\system32\\umu.exe"]
                else:
                    argv = [g_proton.wine_bin, "c:\\windows\\system32\\umu.exe"]
            else:
                log("Executable is inside wine prefix, launching normally.")
                argv = [g_proton.wine_bin]
        else:
            if "UMU_ID" in os.environ:
                append_to_env_str(self.env, "WINEDLLOVERRIDES", "lsteamclient=d", ";")
            if g_proton.host_pe_arch == "x86_64-windows":
                #run with winepreloader directly to avoid restart through start.exe
                self.env["WINELOADERNOEXEC"] = "1"
                argv = [g_proton.lib_dir + "/wine/x86_64-unix/wine-preloader", g_proton.lib_dir + "/wine/x86_64-unix/wine", "c:\\windows\\system32\\steam.exe"]
            else:
                argv = [g_proton.wine_bin, "c:\\windows\\system32\\steam.exe"]

        rc = self.run_proc(adverb + argv + sys.argv[2:] + self.cmdlineappend)

        if remote_debug_proc:
            remote_debug_proc.kill()
            try:
                remote_debug_proc.communicate(timeout=2)
            except subprocess.TimeoutExpired:
                log("terminate remote debugger")
                remote_debug_proc.terminate()
                remote_debug_proc.communicate()

        return rc

if __name__ == "__main__":
    if "STEAM_COMPAT_DATA_PATH" not in os.environ:
        log("No compat data path?")
        sys.exit(1)

    g_proton = Proton(os.path.dirname(sys.argv[0]))

    g_proton.cleanup_legacy_dist()
    g_proton.do_steampipe_fixups()

    g_compatdata = CompatData(os.environ["STEAM_COMPAT_DATA_PATH"])

    g_session = Session()

    g_session.init_wine()

    if g_proton.missing_default_prefix():
        g_proton.make_default_prefix()

    g_session.init_session(sys.argv[1] != "runinprefix")

    # protonfixes execution
    protonfixes.setup(g_session.env, "PATH", ld_path_var, prepend_to_env_str)
    protonfixes.setup_mount_drives(setup_dir_drive)
    protonfixes.winetricks(g_session.env, g_proton.wine_bin, g_proton.wineserver_bin)
    # HACK: handle DXVK_FRAME_RATE and VKD3D_FRAME_RATE through DXVK_CONFIG
    protonfixes.setup_frame_rate(g_session.env, append_to_env_str)
    g_session.check_environment("PROTON_LOCAL_SHADER_CACHE", "localshadercache")
    protonfixes.setup_local_shader_cache(g_session.compat_config, g_session.env)
    g_session.check_environment("PROTON_FSR3_UPGRADE", "fsr3")
    g_session.check_environment("PROTON_FSR4_UPGRADE", "fsr4")
    g_session.compat_config.add("mlfg")
    g_session.check_environment("PROTON_MLFG_UPGRADE", "mlfg")
    g_session.check_environment("PROTON_DLSS_UPGRADE", "dlss")
    g_session.check_environment("PROTON_XESS_UPGRADE", "xess")
    g_session.check_environment("PROTON_USE_OPTISCALER", "optiscaler")
    protonfixes.setup_upscalers(g_session.compat_config, g_session.env, g_compatdata.base_dir, g_compatdata.prefix_dir)
    protonfixes.execute()

    g_compatdata.setup_ddraw("PROTON_USE_D7VK" in g_session.env
            and nonzero(g_session.env["PROTON_USE_D7VK"]))

    #determine mode
    rc = 0
    if sys.argv[1] == "run":
        #start target app
        setup_game_dir_drive()
        setup_steam_dir_drive()
        rc = g_session.run()
    elif sys.argv[1] == "waitforexitandrun":
        #wait for wineserver to shut down
        g_session.run_proc([g_proton.wineserver_bin, "-w"])
        #then run
        rc = g_session.run()
    elif sys.argv[1] == "runinprefix":
        rc = g_session.run_proc([g_proton.wine_bin] + sys.argv[2:])
    elif sys.argv[1] == "destroyprefix":
        g_compatdata.remove_tracked_files()
    elif sys.argv[1] == "getcompatpath":
        #linux -> windows path
        path = subprocess.check_output([g_proton.wine_bin, "winepath", "-w", sys.argv[2]], env=g_session.env, stderr=g_session.log_file)
        sys.stdout.buffer.write(path)
    elif sys.argv[1] == "getnativepath":
        #windows -> linux path
        path = subprocess.check_output([g_proton.wine_bin, "winepath", sys.argv[2]], env=g_session.env, stderr=g_session.log_file)
        sys.stdout.buffer.write(path)
    else:
        log("Need a verb.")
        sys.exit(1)

    sys.exit(rc)

#pylint --disable=C0301,C0326,C0330,C0111,C0103,R0902,C1801,R0914,R0912,R0915
# vim: set syntax=python: