Capture and return output from Bash Leptons

[araghukas]

What should we add?

Make things like this work by capturing stdout from the command, or returning None or '' (empty string) if there is no output.

(As is, the workflow below fails on second with "NoneType has no attribute split".)

import covalent as ct

@ct.leptons.bash(display_name="Run a bash script")
def list_cwd():
    return "ls -lth"

@ct.electron
def break_into_lines(output: str):
    return output.split("\n")

@ct.lattice
def workflow():
    return break_into_lines(list_cwd())

runid = ct.dispatch(workflow)()
print(ct.get_result(runid, wait=True).result)

Describe alternatives you've considered.

No response