Enum ToolProbe 

pub enum ToolProbe {
    Available,
    Unavailable,
    ProbeFailed(Error),
}

Outcome of a spawn-probe availability check (runs).

The NotFound-folds-into-Unavailable decision is made exactly once, here — and a genuine probe failure is a distinct variant so no call site can silently masquerade a broken probe as clean tool absence.

Variants

Available

The probe ran and exited zero — the tool is available.

Unavailable

The tool is cleanly absent: not on PATH (spawn failed with NotFound), or it ran but exited non-zero on its version flag (stub binary / version-flag mismatch).

ProbeFailed(Error)

The probe itself failed for a non-NotFound reason (permission denied, exec-format error, …): presence is UNKNOWN, not “absent”. Callers must surface the error rather than collapse it to ToolProbe::Unavailable.

Trait Implementations

impl Debug for ToolProbe

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.