build a local STAC to upload later

local_pystac.py

"""Generate a STAC catalog."""
import os
import subprocess

import datetime
import pystac


output = subprocess.check_output(
    'gsutil ls gs://my-bucket-with-geotiffs', shell=True)
file_list = [x.rstrip() for x in output.decode('utf-8').split('\n') if x]

catalog = pystac.Catalog(
    id='mygsstac',
    description='mygsstac',
    href='gs://my-bucket-with-geotiffs')

for gs_uri in file_list:
    base_id = os.path.basename(os.path.splitext(gs_uri)[0])
    item = pystac.Item(
        id=base_id,
        geometry=None,
        bbox=None,
        datetime=datetime.datetime.utcnow(),
        properties={}
        )
    item.add_asset(
        key=base_id,
        asset=pystac.Asset(
            href=gs_uri,
            media_type=pystac.MediaType.GEOTIFF))
    catalog.add_item(item)

catalog.normalize_hrefs('mygsstac')
catalog.save('SELF_CONTAINED')