Rename selected configuration profiles to overlays

lifecycle.go

@@ -18,17 +18,17 @@ type Definition[T any] struct {
 }
 
 // Options contains the application definition and per-load input selections.
-// Imports enables explicit path and glob imports; Profile selects one fixed profile
-// overlay; Overrides contains only values explicitly supplied by an application CLI.
+// Imports enables explicit path and glob imports; Overlay selects one fixed overlay;
+// Overrides contains only values explicitly supplied by an application CLI.
 type Options[T any] struct {
 	Definition Definition[T]
 	Imports    bool
-	Profile    string
+	Overlay    string
 	Filesystem *FilesystemContext
 	Overrides  []Override
 }
 
-// FilesystemContext supplies filesystem roots for imports and profiles.
+// FilesystemContext supplies filesystem roots for imports and overlays.
 type FilesystemContext struct {
 	BaseDir string
 	Root    string
@@ -75,7 +75,7 @@ type Result[T any] struct {
 }
 
 // Load parses and strictly decodes zero or one selected source, explicitly enabled
-// imports, and one selected profile. It accepts at most one Options value and
+// imports, and one selected overlay. It accepts at most one Options value and
 // returns no result when any error is reported.
 func Load[T any](source Source, supplied ...Options[T]) (*Result[T], error) {
 	options := make([]engine.Options[T], len(supplied))
@@ -219,7 +219,7 @@ func toEngineOptions[T any](options Options[T]) engine.Options[T] {
 	result := engine.Options[T]{
 		Definition: toEngineDefinition(options.Definition),
 		Imports:    options.Imports,
-		Profile:    options.Profile,
+		Overlay:    options.Overlay,
 	}
 	if options.Filesystem != nil {
 		result.Filesystem = &engine.FilesystemContext{BaseDir: options.Filesystem.BaseDir, Root: options.Filesystem.Root}