TDF - Manual

TDF is a small project aiming to make it easy to install, package and safely run Windows games on GNU/Linux. You can think of it as a portable (as in requiring no installation) version of Proton, based on most of the same technology.

TDF is based on the following awesome projects:

Wine, for Windows emulation, more specifically it includes two custom builds made with tkg, one best suited for modern games, and one more suited for applications and older games
DXVK, for DirectX 9-11 emulation, more specifically it includes both the regular version of DXVK built from source, as well as the gplasync version for cards that don't support the Vulkan GPL extension and dxvk-nvapi for nvapi support on nVidia GPUs
D8VK, for DirectX 8 emulation (soon to be merged into DXVK), built from source
VKD3D-Proton, for DirectX 12 emulation, built from source
Steam Runtime, to make the Wine dependency hell a bit easier (it still depends on some things of course)
xdotool, a useful tool to handle games with problematic window/fullscreen behaviors
...and a handful of other useful things

TDF's main goals are are:

Being able to easily install and run games that you can't or don't want to play through Steam: things like GOG installers, ISOs, repacks, etc.
Sandboxing: by default, network and file system access are blocked to games running inside a TDF instance (note that this will not protect against malware that specifically targets Wine or the Linux kernel)
Being as lightweight and portable as possible: virtually any modern GNU/Linux distro with a GUI can run TDF instances out of the box
Being able to easly update TDF instances as well as testing different versions of the main components, making it possible to help their respective developers
Being able to easily package and transfer a TDF instance to another computer or redistribute it (legally)
Focus on modern games, but a lot of older titles will work as well with some tinkering

If you're happy with Lutris, you probably don't need TDF.

Usage

This section explains how to use TDF to install, play and optionally package a game.

Requirements

A relatively recent PC that's fast enough to run modern games. An x86_64 CPU is required, as well as a GPU with support for Vulkan 1.3 or newer
Linux kernel 5.16 or newer is strongly recommended, but it will work on older versions (tested as low as 4.19)
A modern-ish distro with basic stuff like the GNU coreutils, glibc, systemd, X11, etc. installed, both 32 and 64-bit versions. Arch-based distros will work best.
An AMD graphics card with the latest Mesa 23.1 driver or newer is recommended, but it will also work on nVidia and Intel cards
An SSD is strongly recommended, with a file system like ext4 or btrfs. Do not use NTFS, FAT or exFAT
You must be able to use a Linux system, do file and folder management, know how to install games manually, know some basic shell scripting, etc.

Basic usage

Download the latest build of TDF (or build it yourself)
Extract the archive somewhere, optionally renaming the folder from template-YYYYMMDD to something more descriptive. We'll call this folder a TDF instance, you can have as many instances as you want
- Inside this folder, you'll see 4 things:
  - run.sh: the script that starts all the TDF magic, we'll use this in a moment
  - vars.conf: TDF's main configuration file for this instance, you'll use this to tell TDF where to find the game and to change emulation settings
  - system: a folder containing all the TDF files and scripts, leave it alone for now
  - confs: we'll talk about folder this later
Launch run.sh, it will automatically initialize everything for you and open a Windows command prompt
- Once everything is ready, the TDF instance folder will contain a new folder called zzprefix, this is your "fake Windows", inside it you'll find, among other things, a folder called drive_C, this is the fake C drive, you can enter it to copy game files, mods, etc. at any time
- Depending on the system and the configuration, other folders may also be created, like zzhome and fontcache
- If you're not familiar with the Windows command prompt, just type explorer and press enter to have a more familiar file manager interface, but don't close the command prompt until you're finished
Use the command prompt to install the game like you would on Windows but without launching it
- During the installation, you won't need to install things like DirectX, the Visual C++ Redistributables, etc. because TDF has already done it during the initialization
- If you need to copy or modify some files inside the fake C drive, do it through the Linux file manager, it's easier
- Once you're done, close the command prompt
Edit vars.conf and place the location of the game's exe file in the game_exe variable
Launch run.sh again and hopefully the game will start
- From now on, you can just launch run.sh (or create links to it) to launch this game.
- About 85% of games will work out of the box, some will require some tinkering, usually in the form of changing some variables in vars.conf, which we'll discuss later
- Online games that require anticheat software will usually not work (and that's probably for the best)

Here's a video showing how to install a game from GOG that requires no additional configuration: Basic usage - Installing a game from GOG

You can find more video examples at the end of this document.

Configuration variables

The following lists contain all the variables that can be added in vars.conf to configure emulation settings, work around issues, improve performance, etc.

Essential variables

game_exe
Specifies the Windows-style path to the game's exe file. If no value is set, the command prompt will be launched instead.

Example: game_exe='C:\GTAV\PlayGTAV.exe'

game_args
Arguments to be passed to the game.

Example: game_args='-iwad doom2.wad -file mymod.wad'

game_workingDir
The working directory of the game. By default this is set to the same folder where the game_exe resides. If you need to change this, game_exe will have to be set to a path relative to this folder. All paths must be Windows-style.

Example:

game_exe='bin\indy.exe'
game_workingDir='C:\Indy'

TDF variables

TDF_TITLE
The title to show on the title bar of the TDF windows. By default it's set to "Launcher".

TDF_DETAILED_PROGRESS
Whether to show the details of what's happening above the progress bar in the TDF window.

Possible values:

1 (default): show details like "Starting wine", "Registering DLLs", etc.
0: show a generic message like "Launching..." or "Creating a new wineprefix, this will take a while..."

TDF_ZENITY_PREFER_SYSTEM
Zenity is the tool that displays the TDF windows with the progress bar and the various messages. TDF comes with its own version of Zenity but it can use the one in the system (if installed), which looks better.

Possible values:

1 (default): use Zenity provided by the system, keep the builtin one as a fallback
0: always use the builtin Zenity

TDF_MULTIPLE_INSTANCES
What to do if the user tries to launch run.sh while it's already running.

Possible values:

deny: do nothing, just exit without an error message
error: show an error message and exit
askcmd (default): don't launch the game but ask the user if they want to launch a command prompt in the running instance
cmd: same as askcmd but without asking first
allow: allow multiple instances of the game to be running at the same time (generally a bad idea)

TDF_IGNORE_EXIST_CHECKS
By default, TDF checks whether the executable specified in game_exe actually exists before trying to launch it, but this is not always desirable and can be disabled, which can be useful to run certain commands.

Possible values:

1 (default): check that the executable actually exists and show an error if it doesn't
0: don't check and don't show an error if it doesn't exist

TDF_HIDE_GAME_RUNNING_DIALOG
Whether to hide the TDF window that says "Game running". By default, TDF shows it so you can know if the process has stalled.

Possible values:

0 (default): show the window
1: hide it

TDF_SHOW_PLAY_TIME
Whether to show a message when you close the game that tells you how long you've been playing.

Possible values:

0 (default): don't show it
1: show it

TDF_UI_LANGUAGE
The language to use for the TDF user interface. Does not affect Wine or games (see TDF_WINE_LANGUAGE for that).

By default, TDF tries to obtain the language from the OS. If a translation is not available, it will fall back to English.

Currently implemented languages:

en: English
it: Italian

Wine variables

TDF_WINE_PREFERRED_VERSION
TDF comes with 2 different versions of Wine and can also use the one on your system (if installed). This variable lets you choose which one you prefer.

Possible values:

games (default): use the game-optimized build. This version is based on Valve's version of Wine, with the GE and tkg patches and is very similar to Wine-GE-Proton. Some functionalities have been disabled: anticheat bridges (you can't convince me they're not malware), dbus (automounting of external drives), ISDN, printing, digital camera importing, LDAP and related things, pcap support (network traffic sniffing), smart cart readers support, scanners, low level access to USB devices (does not affect input, that goes over HID), webcam support, Win16 support, winemenubuilder, vkd3d-lib (Wine's own VKD3D implementation, not needed since TDF uses VKD3D-Proton)
mainline: use a mostly regular version of Wine, useful for applications and old games that don't work with the game-optimized build. This version only contains a couple of hotfixes from tkg and the only disabled features are dbus and winemenubuilder for better isolation
system: use the version of Wine that's installed in the system, if it's not installed mainline will be used instead

TDF_WINE_HIDE_CRASHES
When a Wine application crashes, it normally shows a window similar to the "Stopped working" dialog on Windows, but depending on the game and configuration, it may be impossible to interact with that window, leaving you stuck. By default, TDF disables this crash window, but it can be enabled for debugging and troubleshooting purposes.

Possible values:

1 (default): hide the crash window
0: show the crash window

TDF_WINE_AUDIO_DRIVER
Sets the preferred audio driver for Wine. This can be useful if you have crackling audio or if one of the drivers has a lower latency than the others. Default is usually fine.

Possible values:

pulse: use PulseAudio (you may also want to add export PULSE_LATENCY_MSEC=20 for lower latency in music games or export PULSE_LATENCY_MSEC=120 if you have crackling/dropouts)
alsa: use ALSA
jack: use Jack
default (default): let Wine decide

Note: Choosing a driver that doesn't exist in Wine or in your system will result in no sound being played.

Note: Wine doesn't natively support PipeWire yet, it uses PulseAudio by default for compatibility if you're using PipeWire.

TDF_WINE_GRAPHICS_DRIVER
Sets the preferred graphics driver for Wine (as in how it outputs, not how it renders 3D graphics). This can be useful if you're messing around with Wayland and X11 and Wine doesn't work properly.

Possible values:

x11: use X11 (recommended even if you're using Wayland)
wayland: use Wayland (incomplete and buggy at the moment, not recommended)
default (default): let Wine decide (defaults to X11 at the moment, even on Wayland)

Note: Choosing a driver that doesn't exist in Wine or in your system will result in no graphics being displayed.

TDF_WINE_DPI
DPI value for display scaling of Wine applications.

Possible values:

-1 (default): use DPI from the main display
0: let Wine handle scaling
number: use this DPI value (96=100% scaling, 120=125% scaling, 144=150% scaling, etc.). 96 DPI will fix some older games

TDF_WINE_KILL_BEFORE
Whether to kill wine before launching the game. Not recommended.

Possible values:

0 (default): don't kill wine before launching the game
1: kill all wine instances before launching the game

TDF_WINE_KILL_AFTER
Whether to kill wine after the game ends. Not recommended.

Possible values:

0 (default): don't kill wine after the game ends
1: kill all wine instances after the game ends

TDF_START_ARGS
Optional arguments to pass to Wine's start command. More info. Mostly useful to set CPU affinity for old games.

Example: TDF_START_ARGS='/AFFINITY 1'

TDF_WINE_LANGUAGE
By default, TDF will pass the system language to Wine, which may be undesirable for some games and applications that just use the system language instead of showing a language selector. Here's a complete list of locales, obviously not all games will support them.

Example: TDF_WINE_LANGUAGE='it_IT.utf-8'

TDF_WINE_ARCH
The architecture of the Wine installation. Can only be set once, before the initialization is performed, and can't be changed afterwards without deleting the wineprefix.

Possible values:

win64 (default): create a 64-bit Windows installation
win32: create a 32-bit Windows installation (useful for some old games)

TDF_WINE_SYNC
The synchronization method to be used by Wine (game-optimized build only).

Possible values:

fsync (default): use fsync if supported by the kernel (5.16+), otherwise use esync. This provides the best performance and compatibility
esync: use the older esync method
default: let Wine decide

TDF_WINE_DEBUG_RELAY
Enables the Wine relay feature, which traces all interaction between the application and the rest of the system to a file. Extremely slow but can be useful to debug weird issues and crashes.

Possible values:

0 (default): disabled
1: when the game is launched, TDF will ask where you want to save the trace, then launch the game with relay enabled

TDF_WINE_SMOKETEST
Whether or not to perform a "smoke test" to make sure that Wine actually works before trying to run the game, that way we can tell if a crash is a Wine problem or a game problem. TDF does this by default but you can disable it if it takes too long at the "Starting Wine" screen.

Possible values:

1 (default): do the "smoke test"
0: skip the "smoke test" for faster startup

TDF_WINEMONO
Whether to install Wine Mono in the prefix or not. Mostly useful for launchers and applications based on .NET, games don't usually need this.

Possible values:

0 (default): don't install Wine Mono
1: install Wine Mono

TDF_WINEGECKO
Whether to install Wine Gecko in the prefix or not. This provides the equivalent of a Webview, mostly useful for launchers and applications based on IE, games don't usually need this.

Possible values:

0 (default): don't install Wine Gecko
1: install Wine Gecko

export WINEDLLOVERRIDES
Some game fixes and mods come in the form of DLLs that override one of Windows' DLL, usually winmm, dinput8, version, d3d9, etc.
Unlike Windows, which happily loads random DLLs from the game's folder, Wine prefers to use its own DLLs and overrides need to be specified manually.

This is not a TDF variable, but it's part of Wine. More about this here.

Example:

#load winmm.dll and dinput8 from the game's folder (if available)
export WINEDLLOVERRIDES="winmm,dinput8=n,b"

This can also be used to fix games that complain about outdated drivers on AMD cards or that don't detect the correct amount of VRAM, since they often obtain this information through a DLL called amd_ags_x64.dll:

Example:

#use wine's own fake amd_ags_x64 instead of the game's version
export WINEDLLOVERRIDES="amd_ags_x64=b"

Multiple overrides can be separated by a semicolon ;.

export WINE_CPU_TOPOLOGY
This is not a TDF variable, but it allows you to set Wine to use specific CPU cores, similar to the /AFFINITY option of the start command, but more fine grained.

Example:

#limits wine to one CPU core
export WINE_CPU_TOPOLOGY="1:0"

Example:

#limits wine to use the first 4 CPU cores
export WINE_CPU_TOPOLOGY="4:0,1,2,3"

export WINEDEBUG
Enables/disables some Wine debug channels.

By default, TDF sets this to -all to improve performance, but you might want to enable one or more of these for troubleshooting, or restore the default Wine settings using unset WINEDEBUG.

Don't add +relay to this variable, as it's controlled by the TDF_WINE_DEBUG_RELAY variable.

Example:

#log loaded DLLs to the terminal and show the pid of the process that generated each message
export WINEDEBUG=+loaddll,+pid

DXVK, D8VK and VKD3D variables

TDF_DXVK
Whether to install DXVK or not, which provides DirextX 9-11 emulation through Vulkan. If this is disabled, WineD3D will be used instead, which is better for some older games.

Settings for DXVK can be changed by editing the dxvk.conf file that will be created inside zzprefix.

Possible values:

1 (default): use DXVK
0: use WineD3D

TDF_DXVK_ASYNC
If enabled, TDF will use the gplasync version of DXVK instead of the regular version. This is only useful for systems that don't support the Vulkan VK_EXT_graphics_pipeline_library (GPL) extension because either the GPU or the driver is too old.

Possible values:

2 (default): let TDF decide automatically, uses regular DXVK if GPL is supported, gplasync otherwise
0: always use the regular version of DXVK. If the system doesn't support GPL, the game will suffer from heavy shader compilation stuttering
1: always use the gplasync version of DXVK. Not recommended, can introduce minor graphical issues or stability issues

TDF_D8VK
Whether to install D8VK or not, which provides DirextX 8-11 emulation through Vulkan. Enabling this will automatically disable DXVK, DXVK_ASYNC and VKD3D. If this is disabled, WineD3D will be used instead. Games that use DirectX 1-7 will always use WineD3D.

Settings for D8VK can be changed by editing the d8vk.conf file that will be created inside zzprefix.

Possible values:

0 (default): use WineD3D
1: use D8VK

Note: D8VK will be merged into DXVK soon, when this happens this option will be removed.

TDF_DXVK_NVAPI
Whether to install DXVK-nvapi or not, which provides nvapi support for nVidia GPUs. Requires TDF_DXVK to be set to 1.

Possible values:

0 (default): don't use DXVK-nvapi
1: use DXVK-nvapi on nVidia GPUs

TDF_VKD3D
Whether to install VKD3D-Proton, which provides DirectX 12 emulation through Vulkan. If this is disabled, Wine's version of VKD3D is used instead, which has very poor game compatibility compared to this version.

Possible values:

1 (default): use VKD3D-Proton
0: use Wine's VKD3D implementation

VKD3D's config can be changed by using its environment variables. By default, doesn't set this variable, meaning that VKD3D will automatically enable ray tracing on supported cards. Older versions of TDF (before November 2023) set this to dxr11 to enable ray tracing.

Sandboxing variables

TDF_BLOCK_NETWORK
Whether to block network access to Wine. By default, TDF blocks network access entirely to prevent undesirable data collection, but it can be unblocked if you trust the game you're running or it needs to go online.

Possible values:

1 (default): block network access using unshare -nc (creates a namespace without the network stack)
0: allow network access
2: block network access using Firejail if it's installed in the system, otherwise unshare -nc will be used. This can fix some games that take a long time to load when there is no network stack, such as Death Stranding

TDF_BLOCK_BROWSER
Whether to block Wine from opening the system's native web browser or not. By default, TDF will block these requests to prevent undesirable data collection, but it can be unblocked if you trust the game you're running or it needs to open some web pages.

Possible values:

1 (default): block access to the system's native web browser
0: allow Wine to launch the native web browser

Note that allowing access to the native web browser can be abused to bypass TDF_BLOCK_NETWORK, this behavior has been noticed in several game repack installers.

TDF_BLOCK_ZDRIVE
Wine normally exposes a Z drive to applications, with full access to the Linux file system, which can be abused by games to collect data or by malware to modify files outside the TDF instance, but it can also be useful when installing games, since you can access mounted drives, your Downloads folder, etc. or if you're running applications.

Possible values:

1 (default): allow access to the Z drive when in "install mode" (i.e. game_exe is not set yet), making it easier to install the game, block afterwards
2: always block access to the Z drive
0: allow access to the Z drive

Note that while this can help protect against Windows malware, malware designed to attack Wine or Linux can very easily bypass this restriction. Never run untrusted software inside TDF, use a VM instead.

TDF_BLOCK_EXTERNAL_DRIVES
Wine normally exposes external drives to applications, giving a letter to each drive. This can be undesirable for the same reasons as exposing the Z drive and TDF blocks this by default.

Possible values:

1 (default): remove all mappings to external drives when TDF is started but don't disable the winedevice service. If you're not using TDF's own Wine builds, drives connected while Wine is running will be mapped automatically
2: remove all mappings to external drives when TDF is started and also disable the winedevice service so that drives can never be mapped automatically even on other Wine builds (can break some games and especially installers but improves security)
0: allow access to external drives

TDF_PROTECT_DOSDEVICES
Prevents Wine from automatically handling all drive mappings for better security. Can cause the winedevice service to hang when external drives are connected.

Possible values:

0 (default): let Wine handle drive mappings
1: TDF handles drive mappings and denies Wine write access to the zzprefix/dosdevices directory

Note: this option is effectively useless when using TDF's own Wine builds, since dbus is disabled and no mappings will be automatically created.

TDF_BLOCK_SYMLINKS_IN_CDRIVE
When this option is enabled, TDF will scan the C drive on startup and remove all symlinks. This can be useful in case Wine creats some symlinks outside the TDF instance during an update, or if you created a symlink during the installation and forgot to remove it, which can be dangerous.

Possible values:

1 (default): scan and remove all symlinks in the C drive on startup
0: allow symlinks in the C drive

Note that Wine's symlinks to your home directory, My Documents, Desktop, etc. as well as the creation of shortcuts (.desktop files) on your desktop and start menu will always be blocked regardless of settings; TDF is not designed to let applications "integrate" with the system, quite the opposite.

TDF_FAKE_HOMEDIR
When this option is enabled, Wine will not see your home directory, but a zzhome folder will be created in the TDF instance. This can be used to improve security, but it's mostly useful for games that require special settings in ~/.driconf, such as KOTOR.

Possible values:

0 (default): use the real home directory
1: use a fake home directory inside the TDF instance

Note that the zzhome folder and all data inside it will be automatically deleted when this option is disabled.

Gamescope variables

TDF_GAMESCOPE
Whether to enable Gamescope when running the game or not. This is generally not recommended when using the games version of Wine, since it integrates the fshack patches which makes it mostly useless, but it can be useful when using the mainline version for games that change the screen resolution often, require low resolutions, integers scaling, etc. such as KOTOR or WinQuake. If Gamescope is not installed in the system, it has no effect.

Possible values:

0 (default): don't use Gamescope
1: use Gamescope when running games if available

Note that Gamescope currently only works properly on AMD GPUs and getting it to work properly on Intel and nVidia cards requires additional configuration.

TDF_GAMESCOPE_PARAMETERS
The command line arguments used to start Gamescope. You can see a complete list here.

By default, TDF sets this variable to -f -r 60 -w $XRES -h $YRES, where XRES and YRES are two read only variables provided by TDF for conveninece that contain the horizontal and vertical resolution of the main display. This default value emulates a virutal screen with the same resolution as the real display, with a refresh rate of 60hz and sets Gamescope to run in fullscreen without any special scaling.

Miscellaneous variables

TDF_STEAM_RUNTIME
Whether to launch TDF using the Steam Runtime or not. This is generally a good idea as it makes TDF extermely portable, but if it fails to launch you might want to disable it. If you disable this feature, you must have Wine and all its dependencies installed on your system, as well as Zenity.

Possible values:

2 (default): use Steam Runtime only if Wine is not already installed in the system
0: don't use Steam Runtime
1 : use Steam Runtime

TDF_GAMEMODE
Whether to launch the game using Feral Gamemode or not, which can improve performance especially on weaker or mobile systems. If Gamemode is not installed in the system, it has no effect.

Possible values:

1 (default): use Gamemode if available
0: don't use Gamemode

TDF_MANGOHUD
Whether to launch the game with the MangoHud performance overlay or not. If MangoHud is not installed in the system, it has no effect. Note that some games will crash when launched with MangoHud.

Possible values:

0 (default): don't use MangoHud
1: use Mangohud

TDF_COREFONTS
Whether to install the Microsoft Corefonts or not. These are fonts like Arial, Comic Sans, etc. that are required by some games such as PC Building Simulator. This is generally harmless, but if some application has font rendering issues, try disabling it.

Possible values:

1 (default): install the Corefonts
0: don't install the Corefonts

TDF_VCREDIST
Whether to install the Microsoft Visual C++ Redistributable (2015+) or not. This is useful for modern games but unnecessary for older ones.

Possible values:

1 (default): install VCRedist 2015+
0: don't install VCRedist 2015+

export DRI_PRIME
Sometimes on systems with multiple GPUs, a game might start using the wrong GPU, such as the integrated graphics on your laptop instead of the dedicated card.

By setting a value for DRI_PRIME you can tell the game which graphics card to use.

Example:

#use the second GPU
export DRI_PRIME=1

This is not a TDF variable and you can find more about it here.

Callbacks

You can optionally define the following functions inside vars.conf and they will be called at specific moments during operation. This can be useful to fix games that have issues with window positioning, focusing, etc. or that have some special requirements. The language is just bash.

If you need to define some variables, do it inside the callback functions, as the configuration is loaded more than once during the initialization process.

customChecks
This function will be called immediately after the configuration is loaded. It's useful to run some custom checks specific to the game or to change some settings depending on hardware/software configuration. The function returns 0 if the checks succeed, 1 to indicate that they failed and stop TDF. If the function has no return, it will be treated as a success.

Example:

customChecks(){
    if [ "$XDG_SESSION_TYPE" == "x11" ]; then
        return 0
    else
        zenity --error --text="Sorry, this game requires X11"
        return 1
    fi
}

Note that this function is blocking and TDF won't continue the initialization until it has finished running.

onGameStart
This function will be called right before the game is launched.

Example:

onGameStart(){
    setGamma 1.2
}

Note that this function is blocking and the game won't be launched until it has finished running.

onGameEnd
This function will be called when the game's main process finishes running.

Example:

onGameEnd(){
    restoreGamma
}

Notes:

This function is blocking and TDF won't continue until it has finished running
The wineserver is still running when this funcion is called
Some games (especially ones with launchers) will spawn a subprocess and the main process will close, causing this callback to be triggered while the game is still running. In this case, you can check the running processes with isProcessRunning (mentioned later) to know whether the game has actually finished running or not

whileGameRunning
This function will be called right before the game is running, and will continue running in parallel to the game in a subshell.

Example:

whileGameRunning(){
    #workaround for the little black bar at the top of the screen
    waitForWindow "APlagueTaleRequiem_x64.exe"
    sleep 3
    focusWindow $WINDOW
    pressKey alt+enter 2
}

Notes:

This function does not automatically stop running when the game's process ends, so if you're running a loop, make sure to check the game's process using isProcessRunning
The game process may not have been created yet when this function is called, since Wine takes a bit to launch

onArchiveStart
This function will be called right before the packaging process begins when using ./run.sh archive (mentioned later). It can be used to remove or move some unnecessary files like DXVK/VKD3D caches, saved games, etc.. The function receives the same arguments passed to run.sh and can return 1 to prevent the packaging process from starting if something's wrong.

Example:

onArchiveStart(){
    TEMPDIR="/tmp/requiem$RANDOM"
    mkdir "$TEMPDIR"
    mv zzprefix/drive_c/APTRequiem/vkd3d-proton.cache "$TEMPDIR"
    mv zzprefix/drive_c/users/wine/AppData/Local/GOG.com "$TEMPDIR"
}

Note that this function is blocking and the packaging process won't start until it has finished running.

onArchiveEnd
This function will be called at the end of the packaging process when using ./run.sh archive (mentioned later). It can be used to restore files modified or deleted by onArchiveStart. This function receives 0 in input if the packaging process has succeeded, 1 otherwise.
Example:

onArchiveEnd(){
    mv "$TEMPDIR/vkd3d-proton.cache" zzprefix/drive_c/APTRequiem/
    mv "$TEMPDIR/tmp/requiem/GOG.com" zzprefix/drive_c/users/wine/AppData/Local/
    rm -rf "$TEMPDIR"
}

Note that this function is blocking and TDF won't quit until it has finished running.

Builtin functions

For convenience, TDF comes with some functions that can be used inside the callback functions mentioned before, in addition to everything provided by bash such as sleep, grep, etc..

waitForWindow exe title [timeout]
Scans windows to find one that matches the specified exe and contains title in the name. If no matching window is found, it will keep trying for timeout seconds (30 if not specified). If exe is an empty string, it will match any process with the specified title, if title is an empty string, it will match any window from the specified process.

The window IDs will be copied to a WINDOWS array, with the first matching window easily accessible with a WINDOW variable.

The function returns 0 if a match was found, 1 if the timeout was reached.

Examples:

waitForWindow "APlagueTaleRequiem_x64.exe" "A Plague Tale: Requiem" 10: waits up to 10 seconds for the process "APlagueTaleRequiem_x64.exe" to spawn a window that contains "A Plague Tale: Requiem" in the title
waitForWindow "APlagueTaleRequiem_x64.exe": waits up to 30 seconds for the process "APlagueTaleRequiem_x64.exe" to spawn a window
waitForWindow "" "A Plague Tale: Requiem": waits up to 30 seconds for any process to spawn a window that contains "A Plague Tale: Requiem" in the title
waitForWindow "APlagueTaleRequiem_x64.exe" "" 10: waits up to 10 seconds for the process "APlagueTaleRequiem_x64.exe" to spawn a window