Function bootctl_systemd_version

crates/lib/src/bootloader.rs:330–343

()

#[context("Querying bootctl version")]
pub(crate) fn bootctl_systemd_version() -> Result<u32> {
    static VERSION: OnceLock<u32> = OnceLock::new();

    if let Some(v) = VERSION.get() {
        return Ok(*v);
    };

    let out = Command::new("bootctl").arg("--version").run_get_string()?;
    let v = parse_systemd_version(&out).context("Failed to parse version to integer")?;

    let version = VERSION.get_or_init(|| v);

    Ok(*version)
}

/// Parse the systemd major version from `bootctl --version` output, whose first
/// line looks like `systemd 259 (259.5-0ubuntu3)`.