Struct HarnessBuilder 

pub struct HarnessBuilder { /* private fields */ }

Builder: .venture(..), .module(..), .runtime(..), .template(..), then .build().

Implementations

impl HarnessBuilder

pub fn venture(self, venture: Venture) -> Self

pub fn module(self, module: impl Module) -> Self

Adds a module. Composition is compile-time: the wasm binary contains exactly the modules listed here (ADR 0003).

pub fn module_arc(self, module: Arc<dyn Module>) -> Self

Adds an already-shared module (cratefield-testing keeps handles to apply migrations and run conformance).

pub fn runtime(self, runtime: impl Runtime) -> Self

Declares the runtime: its provides() set drives build-time checking of every module’s requires(). The runtime is kept on the built harness for tooling (fz doctor, scheduled fan-out).

pub fn templates( self, templates: impl IntoIterator<Item = (String, Box<dyn Template>)>, ) -> Self

Registers module default templates (<module>/<template> ids). Call before overrides; see template.rs for the convention.

pub fn ui(self, ui: impl UiMount) -> Self

Mounts a UI renderer at /ui (ADR 0010): cratefield_ui::Ui. Off unless called, so a venture without a UI serves nothing there.

pub fn template( self, id: impl Into<String>, template: Box<dyn Template>, ) -> Self

Venture template override. Wins over any module default with the same id; the id’s module part must name a registered module.

pub fn build(self) -> Result<Harness, ConfigError>

Validates everything, collecting all problems before failing (issue #2).

Errors

Err whose Display lists every problem: invalid venture, unknown or duplicated port declarations, duplicate module names, tables or /.well-known routers, harness_api mismatches, invalid UI surfaces, unprovided required ports, and template ids naming unregistered modules.

Trait Implementations

impl Default for HarnessBuilder

fn default() -> HarnessBuilder

Returns the “default value” for a type.