adding script for partitioning and nixos instalation

scripts/wipe-install.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python3 -p grub2 rsync utillinux shadow utillinux e2fsprogs
+from subprocess import run
+from pathlib import Path
+from tempfile import TemporaryDirectory
+import argparse
+import json
+import os
+import sys
+import time
+
+root_device = Path('/dev/disk/by-id/ata-Crucial_CT250MX200SSD1_1537108FC44F')
+bios_boot_part_type = '21686148-6449-6E6F-744E-656564454649'
+config_dir = Path(__file__).parent.parent.absolute()
+
+if os.getlogin() != 'root':
+    print("ERROR: must be run as root", file=sys.stderr)
+    sys.exit(1)
+
+if not root_device.exists():
+    print(f"ERROR: {root_device} not found", file=sys.stderr)
+    sys.exit(1)
+
+print(f"WARNING: this script will WIPE all data on {root_device}")
+if input('Write "Yes" to continue:') != 'Yes':
+    sys.exit(1)
+
+with TemporaryDirectory() as tmp_path:
+    tmp = Path(tmp_path)
+    print(f"Created temporary directory {tmp}")
+
+    parts = (
+        'label: gpt\n'
+        f'name=grub start=2MiB size=10MiB type={bios_boot_part_type}\n'
+        'name=root size=100GiB\n'
+    )
+    run(['sfdisk', root_device], input=parts.encode())
+
+    parts_info = json.loads(run(['sfdisk', '--json', root_device], capture_output=True, check=True).stdout.decode())
+    root_part = Path(parts_info["partitiontable"]["partitions"][1]['node']).resolve()
+
+    for i in range(40):
+        if root_part.exists():
+            break
+        time.sleep(0.2)
+    else:
+        print(f"ERROR: create partition not exists: {root_part}", file=sys.stderr)
+        sys.exit(1)
+
+    run(['mkfs.ext4', root_part])
+
+    root = tmp.joinpath('root')
+    root.mkdir()
+
+    try:
+        run(['mount', root_part, root], check=True)
+
+        run(['mkdir', '-p', root.joinpath('etc', 'nixos')], check=True)
+        run(['rsync', '-r', '--progress', f'{config_dir!s}/', root.joinpath('etc', 'nixos')], check=True)
+
+        root_uuid = parts_info["partitiontable"]["partitions"][1]['uuid'].lower()
+        root.joinpath('etc', 'nixos', 'hw.json').write_text(json.dumps({
+            "rootUUID": f'{root_uuid}',
+        }))
+
+        run(['nixos-install', '--no-root-passwd', '--root', root], check=True)
+        run(['grub-install', f'--root-directory={root!s}', f'--boot-directory={root.joinpath("boot")!s}', root_device], check=False)
+        run(['chpasswd', '--root', root], input=b'root:toor')
+
+    finally:
+        run(['umount', root])