The project is too big to be migrated at once this is why my plan is to start from the top (the projects with the most dependencies) to bottom. The process during the migration will include 2 steps: 1. Build with the old build system 2. Finish with the new build system

My question is: Is it possible to create a preprocess actions (actions that are not related to any targets and are executed before the dependencies are tracked). This will allow me to execute the first step from inside the bjam project with providing all necessary arguments to the old build system without need to create a sophisticated shell/batch scripts to do that.

Thanks in advance.
-g