GameAPI Compat Shim
Restores game methods a REPO update removed, so mods built against the old signatures work again. A BepInEx preloader patch that re-adds the removed overloads and stops the MissingMethodException flood.GameAPI Compat Shim
Restores game methods a R.E.P.O. update removed, so mods built against the old signatures work again.
What it does
A R.E.P.O. update added a trailing parameter to several game methods. Mods compiled against the old signatures now throw MissingMethodException on every call. That can leave a modded enemy dealing no damage, and it fills the log with errors. This is a BepInEx preloader patch. It edits the game assembly in memory at load and re-adds the removed overloads as thin forwarders that call the current versions with the new parameter's default.
Restored overloads:
| Method | Forwards with |
|---|---|
PlayerHealth.HurtOther, 4-arg |
hurtByHeal = false |
EnemyNavMeshAgent.Warp, 1-arg |
force = false |
Sound.PlayLoop, 4-arg |
volumeMultiplier = 1.0 |
PhysGrabber.OverrideGrabRelease, 0-arg |
viewID = -1, releaseTime = 0.5 |
Installation
- Install BepInEx.
- Put
GameApiCompatShim.dllinBepInEx/patchers/, notplugins/. In the wrong folder it does nothing. A mod manager puts it in the right place.
Confirmed working with
- OrtonLongGaming-FreddyEnemy: Freddy's attacks deal damage again and the error storm stops
- Rosayy-Echohold: the plasma gun stops throwing
OverrideGrabReleaseerrors every frame
For developers - detailed breakdown
No plugin GUID, this is a preloader patcher. Log source GameApiCompatShim, TargetDLLs = { "Assembly-CSharp.dll" }.
It has to be a preloader because the target is the game assembly, which loads from the Managed folder during preload. Plugin time is too late to add methods, and Harmony cannot patch a method into existence.
For each row in the table, Patch(AssemblyDefinition) uses Mono.Cecil to:
- Find the current overload: same name, non-static, with more parameters than the old count. The shortest such overload wins.
- Stop if the type is missing, the longer overload is gone, or an overload with the old argument count already exists. Each case is logged. A future game update that reverts the signature makes this a no-op.
- Emit a new public instance method with the old parameter list whose body is
ldarg.0, load each parameter, push the default constant for the added trailing parameter,callthe current overload,popany non-void return,ret.
The edit happens on the in-memory AssemblyDefinition during BepInEx's preload chain. Nothing on disk changes.
It restores exactly the overloads listed in the table above. A mod that throws MissingMethodException on some other signature is not covered, and the exception text names the method a future version would need. Old callers get the new parameter's default, which is all they could ever have used, since the parameter did not exist when they were compiled.