86 lines
2.6 KiB
Python
86 lines
2.6 KiB
Python
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#!/usr/bin/env python3
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"""Read-only environment report used before installing the persistent node."""
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from __future__ import annotations
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import argparse
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import json
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import os
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import platform
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import shutil
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import subprocess
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from pathlib import Path
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from typing import Any
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def command(argv: list[str], timeout: int = 20) -> dict[str, Any]:
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if shutil.which(argv[0]) is None:
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return {"available": False}
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try:
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result = subprocess.run(
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argv,
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stdin=subprocess.DEVNULL,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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text=True,
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timeout=timeout,
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shell=False,
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)
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return {
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"available": True,
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"exit_code": result.returncode,
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"output": result.stdout[:32_000],
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}
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except subprocess.TimeoutExpired:
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return {"available": True, "error": "timeout"}
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def inspect() -> dict[str, Any]:
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efi = command(["efibootmgr", "-v"])
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disks = command(["lsblk", "-J", "-o", "NAME,FSTYPE,LABEL,MOUNTPOINTS"])
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virt = command(["systemd-detect-virt"])
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boot_text = str(efi.get("output", "")).lower()
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disk_text = str(disks.get("output", "")).lower()
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windows_hint = any(
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marker in boot_text or marker in disk_text
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for marker in ("windows boot manager", "microsoft", "ntfs", "bitlocker")
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)
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return {
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"schema": "canger-node-preflight/v1",
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"hostname": platform.node(),
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"platform": platform.platform(),
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"machine": platform.machine(),
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"systemd_running": os.path.isdir("/run/systemd/system"),
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"virtualization": virt,
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"efi_boot_entries": efi,
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"block_filesystems": disks,
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"possible_windows_dual_boot": windows_hint,
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"continuity": {
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"while_linux_is_booted": "supported",
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"after_reboot_back_into_linux": "supported",
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"while_another_dual_boot_os_is_active": "not_possible_from_linux",
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},
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"note": (
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"A dual-boot switch powers off Linux. Cross-OS continuity requires "
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"a companion agent in the other OS, a virtual machine, or separate hardware."
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),
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}
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def main() -> None:
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parser = argparse.ArgumentParser()
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parser.add_argument("--output")
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args = parser.parse_args()
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report = inspect()
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text = json.dumps(report, ensure_ascii=False, indent=2) + "\n"
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if args.output:
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target = Path(args.output)
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target.parent.mkdir(parents=True, exist_ok=True)
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target.write_text(text, encoding="utf-8")
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os.chmod(target, 0o600)
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print(text, end="")
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if __name__ == "__main__":
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main()
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