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#!/usr/bin/env python3
import argparse
import logging
import yaml
import sys
def parse_arguments():
parser = argparse.ArgumentParser(description="ensure pc gadget has ubuntu-save")
parser.add_argument(
"gadgetyaml", type=argparse.FileType("r"), help="path to gadget.yaml input file"
)
parser.add_argument('--add', help='add ubuntu-save if absent',
action='store_true')
parser.add_argument('--remove', help='remove ubuntu-save if present',
action='store_true')
return parser.parse_args()
def main(opts):
gadget_yaml = yaml.safe_load(opts.gadgetyaml)
structs = gadget_yaml["volumes"]["pc"]["structure"]
save_idx = -1
if opts.add:
for idx, s in enumerate(structs):
role = s.get("role", "")
if role == "system-save":
logging.info("system-save structure already present")
# already has ubuntu-save
return
if role == "system-data":
# ubuntu-save precedes ubuntu-data
save_idx = idx
break
if save_idx == -1:
raise RuntimeError("cannot find a suitable place to insert ubuntu-save")
ubuntu_save = {
"name": "ubuntu-save",
"role": "system-save",
# TODO:UC20: update when pc-amd64-gadget changes
"size": "16M",
"filesystem": "ext4",
"type": "83,0FC63DAF-8483-4772-8E79-3D69D8477DE4",
}
structs.insert(save_idx, ubuntu_save)
elif opts.remove:
for idx, s in enumerate(structs):
role = s.get("role", "")
if role == "system-save":
save_idx = idx
break
if save_idx == -1:
logging.info("system-save structure already absent")
return
del structs[save_idx]
yaml.dump(gadget_yaml, stream=sys.stdout, indent=2, default_flow_style=False)
if __name__ == "__main__":
logging.basicConfig(level=logging.DEBUG)
opts = parse_arguments()
if opts.add and opts.remove:
raise RuntimeError('--add and --remove cannot be used together')
elif not opts.add and not opts.remove:
opts.add = True
main(opts)
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