DOOMWADDIR can be used to specify a path to a folder containing IWAD files. This allows using a single set of IWADs with various source ports regardless of their binary's location, without needing to create symbolic links in every source port's folder.
This affects the IWAD selection screen, -iwad CLI argument (you can use -iwad doom2 directly without specifying a file path or extension[^1]) and -file CLI argument as well.
[^1]: Make sure to check for both .WAD and .wad due to filesystems being case-sensitive (not just on Linux, as macOS and even Windows can be configured to be case-sensitive).
DOOMWADPATH also exists as an alternative that allows specifying multiple folders (separated by : on macOS/Linux and ; on Windows). If both are defined, DOOMWADDIR is read first, then DOOMWADPATH is parsed for a list of additional WAD folders.
The DOOMWADDIR environment variable is supported in pretty much every source port out there, including GZDoom, dsda-doom, DOOM Retro, Crispy Doom and more.
Helion version: https://github.com/Helion-Engine/Helion/commit/73e70716f9e4309255ed80ad46f6a074516010c6
DOOMWADDIRcan be used to specify a path to a folder containing IWAD files. This allows using a single set of IWADs with various source ports regardless of their binary's location, without needing to create symbolic links in every source port's folder.This affects the IWAD selection screen,
-iwadCLI argument (you can use-iwad doom2directly without specifying a file path or extension[^1]) and-fileCLI argument as well.[^1]: Make sure to check for both
.WADand.waddue to filesystems being case-sensitive (not just on Linux, as macOS and even Windows can be configured to be case-sensitive).DOOMWADPATHalso exists as an alternative that allows specifying multiple folders (separated by:on macOS/Linux and;on Windows). If both are defined,DOOMWADDIRis read first, thenDOOMWADPATHis parsed for a list of additional WAD folders.The
DOOMWADDIRenvironment variable is supported in pretty much every source port out there, including GZDoom, dsda-doom, DOOM Retro, Crispy Doom and more.DOOMWADPATHisn't supported as commonly, but DOOM Retro supports it.