AssetPostprocessor and Version Control

Hi Everyone,

I have an issue with an AssetPostprocessor script.

Let make it simple:

public class PostProcessorMaster : AssetPostprocessor {

     void OnPreprocessModel ()
     {
         ModelImporter importer = assetImporter as ModelImporter;
         importer.materialSearch = ModelImporterMaterialSearch.Everywhere;
         importer.materialName = ModelImporterMaterialName.BasedOnMaterialName;
         importer.isReadable = false;
     }    

}

Nothing fancy. It works fine, when I import a model.

But let's say I have my project on version control

• I open a new empty workspace

• get the last version of my project,

• the AssetPostprocessor will trigger again even though the asset is already setup correctly because it has been done before when committed to source control.

How can I avoid that ?

How do you know that it's really the firsttime that an asset as been imported ?

Thanks a lot