LUA_PATH causes problems with "require"

[Rinart73]

Tested on Windows 10 x64.

If you'll define "LUA_PATH" system variable (for example you installed Lua for some tasks), calling "require" in your ingame scrips may fail.

Ingame Lua will check "LUA_PATH" variable and use it instead of "..steamapps/common/Avorion/". At least this is what happens with mods (maybe because "require" is being called using "pcall"):

 

local ext, err = pcall(require, 'mods/ExtTurretFactory/scripts/entity/merchants/turretfactory')
if not ext then print('Mod: ExtTurretFactory, failed to extend turretfactory.lua!') end

 

module 'mods/ExtTurretFactory/scripts/entity/merchants/turretfactory' not found:
2018-07-20 15-53-31| 	no field package.preload['mods/ExtTurretFactory/scripts/entity/merchants/turretfactory']
2018-07-20 15-53-31| 	no file 'C:\Program Files\Lua\5.2\lua\mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.luac'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file '/data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'data/scripts/lib/mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.lua'
2018-07-20 15-53-31| 	no file 'C:\Program Files (x86)\Steam\steamapps\common\Avorion\bin\mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.dll'
2018-07-20 15-53-31| 	no file 'C:\Program Files (x86)\Steam\steamapps\common\Avorion\bin\loadall.dll'
2018-07-20 15-53-31| 	no file '.\mods/ExtTurretFactory/scripts/entity/merchants/turretfactory.dll'

 

After I removed "LUA_PATH" system variable, everything worked just fine, so it's not mod problem.

So please make ingame Lua ignore "LUA_PATH" variable.

[Kamo]

Wow, kind of a major bug :o. Weird that it hasn't been remarked sooner.

[Shrooblord]

A super interesting bug. Notice also how it does eventually check paths in your Avorion installation, but then it's looking for DLL files. Weird.

[Rinart73]

A super interesting bug. Notice also how it does eventually check paths in your Avorion installation, but then it's looking for DLL files. Weird.

That's normal Lua behaviour. Sadly though you can't use DLL Lua modules in Avorion because Lua is included in exe (no export data).