Struct Inlined 

pub struct Inlined;

Pick an inlined Kamaji backend from a caller-supplied preference list.

prefer is walked in order; the first backend whose probe came back available is selected, the matching factory is invoked, and the resulting trait object is returned. If none of the preferred backends are available, the function returns the probe error for the last entry in the preference list (its install hint is what the caller most wanted).

Example shape

let availability = BackendAvailability::probe().await;
let kamaji = Inlined::pick(
    &availability,
    &[Backend::Docker, Backend::Containerd],
    |backend| match backend {
        Backend::Docker => Ok(Arc::new(docker::DockerRuntime::new()) as Arc<dyn Kamaji>),
        Backend::Containerd => Ok(Arc::new(containerd::ContainerdRuntime::connect_at(socket).await?) as _),
        Backend::Native => unreachable!("not in preference list"),
    },
)?;

The factory closure is invoked only for the selected backend, so callers can construct backends that themselves require I/O without paying for the ones they don’t pick.

Implementations

impl Inlined

pub fn pick<F>( availability: &BackendAvailability, prefer: &[Backend], factory: F, ) -> Result<Arc<dyn Kamaji>, BackendUnavailable>

where F: FnOnce(Backend) -> Arc<dyn Kamaji>,

Walk prefer in order and return the first available backend.

The factory is invoked exactly once with the chosen backend tag. Returns BackendUnavailable for the last preferred backend if none are available (callers who prefer Docker but accept Containerd see the Docker install hint).