Implement this function to receive a callback before the build is started.
using UnityEditor; using UnityEditor.Build; class MyCustomBuildProcessor : IPreprocessBuild { public int CallbackOrder { get { return 0; } } public void OnPreprocessBuild(BuildTarget target, string path) { Debug.Log("MyCustomBuildProcessor.OnPreprocessBuild for target " + target + " at path " + path); } }