Custom API Functions

This is the most common way to extend StepUp Core. It is essentially the same as writing functions as those explained in the No Rules tutorial. The only difference is that you can include such functions in a Python package, and call it a StepUp extension, which makes it easier to share and reuse these functions.

A few things to keep in mind:

• API functions that (indirectly) call the step() function should always return the resulting StepInfo object.
• Keep the computational cost of the API function low. They should only be used to plan the execution of a step and perform do any of the actual work.
• If the execution consists of calling a Python script, you can create a new action instead to improve the performance. The action can run the same script without creating a new process.