I have the following step as part of a work flow which has two integer inputs startFrame and numFrames
cwl.WorkflowStep( in_=[ cwl.WorkflowStepInput(id="startFrame",source="startFrame"), cwl.WorkflowStepInput(id="endFrame",source="startFrame"), cwl.WorkflowStepInput(id="stepFrame",source="startFrame"),
for one of the step, I would like to have endFrame and stepFrame be calculate base on the workflow inputs as it is not a simple source but calculated base on the value of some source. They calculation are simple integer arithmetic.
e.g. I would like endFrame to be numFrames - 1 + startFrame