Struct ManifestBuilder 

pub struct ManifestBuilder { /* private fields */ }

Builder for constructing a WasmManifest-compatible JSON string.

Collects metadata from scenario tags, JTBD blocks, and parsed predicates to produce a complete manifest for embedding in generated WASM modules.

Examples

use converge_tool::codegen::ManifestBuilder;
use converge_tool::gherkin::{ScenarioMeta, ScenarioKind, InvariantClassTag};

let meta = ScenarioMeta {
    name: "Brand Safety".to_string(),
    kind: Some(ScenarioKind::Invariant),
    invariant_class: Some(InvariantClassTag::Structural),
    id: Some("brand_safety".to_string()),
    provider: None,
    is_test: false,
    raw_tags: vec![],
};

let json = ManifestBuilder::new()
    .from_scenario_meta(&meta)
    .build()
    .unwrap();

assert!(json.contains("brand_safety"));
assert!(json.contains("Structural"));

Implementations

impl ManifestBuilder

pub fn new() -> Self

Create a new empty manifest builder.

pub fn from_scenario_meta(self, meta: &ScenarioMeta) -> Self

Populate from extracted scenario metadata (tags).

Sets kind, invariant class, and name from the scenario’s parsed tags. The @id:<value> tag becomes the module name; if absent, the scenario name is sanitized to a valid identifier.

pub fn from_jtbd(self, jtbd: &JTBDMetadata) -> Self

Populate JTBD metadata from a parsed JTBD block.

pub fn from_predicates(self, predicates: &[Predicate]) -> Self

Infer dependencies and capabilities from parsed predicates.

Extracts context key references from predicates as dependencies. Automatically adds ReadContext capability when dependencies exist.

pub fn with_version(self, version: &str) -> Self

Set the module version.

pub fn with_source_hash(self, hash: &str) -> Self

Set the source hash (SHA-256 of the .truth file content).

pub fn with_truth_id(self, id: &str) -> Self

Set the truth file ID.

pub fn build(self) -> Result<String, ManifestError>

Build the manifest JSON string.

Errors

Returns ManifestError::MissingInvariantClass if kind is Invariant but no class tag was provided.

Returns ManifestError::MissingDependencies if kind is Agent but no context key dependencies were found.

Returns ManifestError::MissingName if no name could be determined.

Trait Implementations

impl Default for ManifestBuilder

fn default() -> Self

Returns the “default value” for a type.