pc-backup/start.py

import os
import subprocess
import socket
from pathlib import Path, PurePosixPath

is_windows = os.name == "nt"


def read_data_sources(file: Path) -> list[Path]:
    with open(file) as f:
        paths = f.readlines()
        return [Path(p_str.strip()).expanduser() for p_str in paths]


def to_source_path(path: Path):
    mount_base = PurePosixPath("/mnt") / "source"
    inner_path = PurePosixPath(path)
    with_drive = PurePosixPath(inner_path.parts[0].replace(":", "")).joinpath(*inner_path.parts[1:])
    return mount_base / with_drive.relative_to(with_drive.anchor)


def main():
    data_sources = read_data_sources(Path("./data_sources"))
    hostname = socket.gethostname()
    container_name = "borgmatic"
    ssh_auth_sock = os.getenv("SSH_AUTH_SOCK")
    config_d_path = Path.cwd() / "data" / "borgmatic.d"
    config_path = Path.cwd() / "data" / "borgmatic"
    credentials_path = Path.cwd() / "data" / "credentials"
    storage_box_env = credentials_path / "storage_box_env"
    ssh_config_path = Path.home() / ".ssh"
    volumes = [
        f"{config_d_path}:/etc/borgmatic.d/",
        f"{config_path}:/etc/borgmatic/",
        f"{credentials_path}:/credentials/",
        f"{ssh_config_path}:/root/.ssh",
        "borg_config:/root/.config/borg",
        "borg_cache:/root/.cache/borg",
        "borgmatic_state:/root/.local/state/borgmatic",
    ]
    if ssh_auth_sock:
        volumes += [f"{ssh_auth_sock}:{ssh_auth_sock}:Z"]

    if is_windows:
        ssh_key_name = "theenglishway-windows"
    else:
        ssh_key_name = "theenglishway.pub"

    volumes += [
        f"{vol}:{to_source_path(vol)}:ro" for vol in data_sources
    ]

    volume_args = [a for vol in volumes for a in ["-v", vol]]
    image_name = "ghcr.io/borgmatic-collective/borgmatic"

    args = [
        "podman",
        "run",
        "-h",
        hostname,
        "--detach",
        "--name",
        container_name,
        "-e",
        "SSH_AUTH_SOCK",
        "-e",
        "TZ=Europe/Paris",
        "-e",
        f"SSH_KEY_NAME={ssh_key_name}",
        "--env-file",
        storage_box_env,
        "--security-opt=label=disable"
    ] + volume_args + [image_name]
    print(args)
    subprocess.run(args)

if __name__ == "__main__":
    main()