Prepare sequence registration preflight

internal/engine/load.go

@@ -16,6 +16,8 @@ type Definition[T any] struct {
 	Validate func(*T, *Validation)
 	Version  *VersionRule
 	Secret   func(Path) bool
+
+	sequenceRegistrations []sequenceRegistration
 }
 
 // Options contains the application definition and per-load input selections.
@@ -137,12 +139,16 @@ func Load[T any](source Source, secrets SecretBinding, supplied ...Options[T]) (
 
 func loadWithSecretLookup[T any](source Source, secrets SecretBinding, lookup secretLookup, supplied ...Options[T]) (*Loaded[T], error) {
 	options, diagnostics := selectOptions(source, supplied)
+	policy, policyDiagnostics := compileSequencePolicy(options.Definition.sequenceRegistrations)
+	diagnostics = append(diagnostics, policyDiagnostics...)
 	if len(diagnostics) != 0 {
 		return nil, (&diagnosticAccumulator{diagnostics: diagnostics}).loadError()
 	}
+	definition := options.Definition
+	definition.sequenceRegistrations = nil
 	request := loadRequest[T]{
 		main:       loadInput{source: source, imports: options.Imports, filesystem: options.Filesystem},
-		definition: options.Definition, overlay: options.Overlay,
+		definition: definition, sequencePolicy: policy, overlay: options.Overlay,
 		overrides: options.Overrides, ordinary: true,
 		sourceVersionMode: options.SourceVersionMode,
 		effectiveVersion:  effectiveSourceVersionRule(options.Definition.Version, Path{}, options.SourceVersionMode),