#!/usr/bin/env python

import arvados

inputs = arvados.current_job()['script_parameters']['input']
if not isinstance(inputs, (list,tuple)):
    inputs = [inputs]

out_manifest = ''
for locator in inputs:
    out_manifest += arvados.CollectionReader(locator).manifest_text()

arvados.current_task().set_output(arvados.Keep.put(out_manifest))