feat: control systemd Docker daemon target

internal/target/target.go

@@ -44,5 +44,8 @@ type Target interface {
 	Description() Description
 	Availability(context.Context) Availability
 	Inspect(context.Context, *profile.Profile) Inspection
+	// Confirmation returns a warning that must be accepted before SetDesired.
+	// An empty string means the operation needs no confirmation.
+	Confirmation(enabled bool) string
 	SetDesired(context.Context, bool, *profile.Profile) OperationResult
 }

internal/target/target_test.go

@@ -20,6 +20,7 @@ func (seamTarget) Availability(context.Context) target.Availability {
 func (seamTarget) Inspect(context.Context, *profile.Profile) target.Inspection {
 	return target.Inspection{State: target.Disabled, Evidence: "absent"}
 }
+func (seamTarget) Confirmation(bool) string { return "" }
 func (seamTarget) SetDesired(context.Context, bool, *profile.Profile) target.OperationResult {
 	return target.OperationResult{Inspection: target.Inspection{State: target.Enabled}}
 }