Struct SdCppEngine 

pub struct SdCppEngine { /* private fields */ }

Worker-side engine that drives sd-cli per job.

sd-cli is resolved lazily on the first image job and cached: an operator install (env / PATH / ~/.local/bin) wins, otherwise the binary is auto-provisioned into <models_root>/bin/. The Mutex serialises that one-time resolution so two concurrent jobs can’t race the download.

Implementations

impl SdCppEngine

pub fn new(models_root: &Path) -> Self

Build the engine. Always registers: sd-cli is resolved (and provisioned into <models_root>/bin/ if missing) lazily on the first image job, so the engine serves real image work even on a box that has never had a stable-diffusion.cpp build installed. models_root is created on demand by the provisioner / model downloader, so registration touches no filesystem.

Trait Implementations

impl Engine for SdCppEngine

fn name(&self) -> &'static str

fn capabilities(&self) -> EngineCapabilities

fn dispatch(&self, _model: &str, _task: Task) -> Result<TaskResult>

fn dispatch_with_source( &self, model: &str, task: Task, source: &ModelSource, ) -> Result<TaskResult>

Dispatch with the studio’s ModelSource attached. Engines that need it (download URLs / CLI defaults) override this; engines that don’t (synthetic) keep using the plain dispatch method via the default impl below.