35 lines
1.6 KiB
Python
35 lines
1.6 KiB
Python
"""Pinned official EEPROM configuration tool and Pi 5 preview image."""
|
|
import fcntl
|
|
import hashlib
|
|
import json
|
|
import os
|
|
from pathlib import Path
|
|
import subprocess
|
|
import tempfile
|
|
|
|
PROJECT=Path(__file__).resolve().parents[1]
|
|
|
|
def sha256(path):
|
|
with Path(path).open('rb') as stream:return hashlib.file_digest(stream,'sha256').hexdigest()
|
|
|
|
def prepare():
|
|
pin=json.loads((PROJECT/'config/eeprom/inputs.json').read_text())
|
|
cache=PROJECT/'.host/eeprom'/pin['commit'];cache.mkdir(parents=True,exist_ok=True)
|
|
with (cache/'.lock').open('a') as lock:
|
|
fcntl.flock(lock,fcntl.LOCK_EX)
|
|
for item in pin['files']:
|
|
target=cache/item['name']
|
|
if not target.exists():
|
|
if os.environ.get('FDS_OFFLINE')=='1':raise ValueError(f'Missing offline EEPROM input: {target}')
|
|
url=f'https://raw.githubusercontent.com/raspberrypi/rpi-eeprom/{pin["commit"]}/{item["path"]}'
|
|
fd,name=tempfile.mkstemp(prefix='.download-',dir=cache);os.close(fd)
|
|
temporary=Path(name)
|
|
try:
|
|
subprocess.run(['curl','--fail','--location','--silent','--show-error',url,'--output',str(temporary)],check=True)
|
|
if sha256(temporary)!=item['sha256']:raise ValueError(f'EEPROM input checksum mismatch: {item["name"]}')
|
|
temporary.replace(target)
|
|
finally:temporary.unlink(missing_ok=True)
|
|
if not target.is_file() or sha256(target)!=item['sha256']:
|
|
raise ValueError(f'Cached EEPROM input changed: {target}')
|
|
return cache,pin
|