WIP: checkpoint current tree

audit/internal/platform/install_to_ram.go

@@ -120,10 +120,45 @@ func (s *System) RunInstallToRAM(ctx context.Context, logFunc func(string)) erro
 		log(fmt.Sprintf("Warning: rebind /run/live/medium failed: %v", err))
 	}
 
+	log("Verifying live medium now served from RAM...")
+	status := s.LiveBootSource()
+	if err := verifyInstallToRAMStatus(status); err != nil {
+		return err
+	}
+	log(fmt.Sprintf("Verification passed: live medium now served from %s.", describeLiveBootSource(status)))
 	log("Done. Installation media can be safely disconnected.")
 	return nil
 }
 
+func verifyInstallToRAMStatus(status LiveBootSource) error {
+	if status.InRAM {
+		return nil
+	}
+	return fmt.Errorf("install to RAM verification failed: live medium still mounted from %s", describeLiveBootSource(status))
+}
+
+func describeLiveBootSource(status LiveBootSource) string {
+	source := strings.TrimSpace(status.Device)
+	if source == "" {
+		source = strings.TrimSpace(status.Source)
+	}
+	if source == "" {
+		source = "unknown source"
+	}
+	switch strings.TrimSpace(status.Kind) {
+	case "ram":
+		return "RAM"
+	case "usb":
+		return "USB (" + source + ")"
+	case "cdrom":
+		return "CD-ROM (" + source + ")"
+	case "disk":
+		return "disk (" + source + ")"
+	default:
+		return source
+	}
+}
+
 func copyFileLarge(ctx context.Context, src, dst string, logFunc func(string)) error {
 	in, err := os.Open(src)
 	if err != nil {