Provide passive per-source resource contexts

internal/engine/load_input.go

@@ -12,6 +12,7 @@ type assembledInput struct {
 	document    *document.Node
 	composition *composedDocument
 	sources     []SourceInfo
+	contexts    map[string]ResourceContext
 }
 
 func assembleBaseInput[T any](source Source, options Options[T]) (assembledInput, []Diagnostic) {
@@ -56,6 +57,13 @@ func assembleBaseInputTracked[T any](source Source, options Options[T], accounti
 		accounting.bytes += parsed.bytes
 		accounting.nodes += countInputNodes(input.document)
 	}
+	if !activeOverlay(options.Overlay) || options.Imports {
+		contexts, diagnostic := contextsForAcquiredSources(source, options.Filesystem, parsed.source, input.sources)
+		if diagnostic != nil {
+			return input, []Diagnostic{*diagnostic}
+		}
+		input.contexts = contexts
+	}
 	return input, nil
 }
 
@@ -94,6 +102,11 @@ func applyInputLayers[T any](source Source, options Options[T], input assembledI
 		if len(diagnostics) != 0 {
 			return input, diagnostics
 		}
+		contexts, diagnostic := contextsForAcquiredSources(source, options.Filesystem, input.parsed.source, input.sources[len(input.sources)-1:])
+		if diagnostic != nil {
+			return input, []Diagnostic{*diagnostic}
+		}
+		mergeResourceContexts(&input.contexts, contexts)
 	}
 	if len(options.Overrides) != 0 {
 		input.sources, diagnostics = assembly.applyOverrides(