Assembly Post Processing

Hello,

i've written a post processor which rewrites some CIL-Code (Mainly generating specific functions to get rid of switch/case). Everything is working nicely inside the Editor (InitializeOnLoad) and its a huge performance benefit.

Trouble comes when i create a player since all scripts are compiled again - but this time without calling my post processor. This means, that the base for e.g. ILCPP will be the unmodified assembly instead of the optimized one.

Can i somehow create a hook between compilation and actual writing of the generated assembly-csharp file for the player?

The only solution i know (and i think will work) is to create a dll with optimizations outside of unity, but the workflow will be a mess then.

Greetings
Michael

 

Support for this has been requested for a while now: https://feedback.unity3d.com/suggestions/access-to-final-assemblies-before-they-put-in-build

 

Thanks, i guess i've got to stop my efforts then since it will probably never be done. Anyway, voted on this.

 

Voted too. With the new development model Unity is following, it's probably more likely to happen now than it was before, you just need to somehow remind Unity about it. Poking some devs might help!

 

Any updates on this? Is it possible to modify "Library/ScriptAssemblies/Assembly-CSharp.dll" within build pipeline?

Related question: https://forum.unity3d.com/threads/an-assembly-mono-cecil-has-already-been-imported.473254/

 

You can try something like

Code (CSharp):

1. #if UNITY_EDITOR
2. class PostprocessBuild : UnityEditor.Build.IPostBuildPlayerScriptDLLs
3. {
4.     public int callbackOrder {
5.         get { return 1; }
6.     }
7.  
8.     public void OnPostBuildPlayerScriptDLLs(UnityEditor.Build.Reporting.BuildReport report)
9.     {
10.         // Your code
11.     }
12. }
13. #endif

That seems to be invoked at the appropriate time to do assembly transformations.

 

Can you access the DLL paths from the passed BuidlReport object? if not, it should've been designed that way, so you can actually easily get the paths to modify the assemblies you want.