Function generate_target 

pub fn generate_target(
    target: &TargetSpec,
    output_dir: &Path,
    force: bool,
    provenance: &SourceProvenance,
) -> Result<GeneratedArtifact>

Generate one target and its deterministic provenance manifest.

Source provenance must be captured before this function is called. If either deterministic destination exists, generation fails unless force is true.

Errors

Returns an error on lowering, serialization, directory, overwrite, or file write failures.