Acelogic
1510d8c6ce
An EL2 monitor/hypervisor and toolchain that boots macOS 27 on the ASUS A16 (Snapdragon X2 Elite), with an Adreno Metal plug-in and IOGPU kext, and air2ir3, an AIR to Mesa ir3 shader compiler. MIT, with GPL-2.0 components listed in LICENSE and THIRD_PARTY_NOTICES.md. No Apple, Qualcomm, ASUS or Microsoft binaries are included.
70 lines
2.5 KiB
Python
Executable File
70 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: MIT
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"""Resumable IPSW downloader.
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Apple's restore images are ~27GB and the CDN drops connections, so this resumes
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with Range requests rather than restarting. Progress goes to stdout so it can be
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followed with tail(1) when run in the background.
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python3 tools/fetch-ipsw.py <url> [destination]
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"""
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import os
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import sys
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import time
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import urllib.request
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from pathlib import Path
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CHUNK = 1 << 20
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def fetch(url, path):
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for attempt in range(1, 41):
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have = path.stat().st_size if path.exists() else 0
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request = urllib.request.Request(url)
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if have:
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request.add_header('Range', f'bytes={have}-')
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try:
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with urllib.request.urlopen(request, timeout=60) as response:
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if have and response.status != 206:
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print(f'server ignored Range (status {response.status}); restarting')
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path.unlink(missing_ok=True)
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have = 0
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total = have + int(response.headers.get('Content-Length', 0))
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start, last = time.monotonic(), 0.0
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with path.open('ab' if have else 'wb') as out:
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while True:
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block = response.read(CHUNK)
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if not block:
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break
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out.write(block)
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have += len(block)
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now = time.monotonic()
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if now - last > 5:
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rate = have / max(now - start, 1e-9) / 1e6
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pct = 100.0 * have / total if total else 0.0
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print(f'{have/1e9:6.2f} / {total/1e9:.2f} GB '
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f'{pct:5.1f}% {rate:5.1f} MB/s', flush=True)
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last = now
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if total and have >= total:
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print(f'complete: {have/1e9:.2f} GB -> {path}', flush=True)
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return 0
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except Exception as error: # noqa: BLE001 - resume on anything
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print(f'attempt {attempt}: {type(error).__name__}: {error}; resuming', flush=True)
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time.sleep(min(5 * attempt, 60))
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print('gave up', flush=True)
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return 1
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def main():
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if len(sys.argv) < 2:
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print(__doc__)
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return 2
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url = sys.argv[1]
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path = Path(sys.argv[2]) if len(sys.argv) > 2 else Path(os.path.basename(url))
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path.parent.mkdir(parents=True, exist_ok=True)
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return fetch(url, path)
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if __name__ == '__main__':
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sys.exit(main())
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