Allow relative OS package URL in CreateOSPackage

ospkg/ospkg.go

@@ -76,10 +76,10 @@ func CreateOSPackageCtx(ctx context.Context, label, pkgURL, kernel, initramfs, c
 			return nil, fmt.Errorf("invalid package URL %q, %w", pkgURL, err)
 		}
 
-		if uri.Scheme == "" || uri.Scheme != "http" && uri.Scheme != "https" {
-			stlog.Debug("os package: OS package URL: missing or unsupported scheme in %s", uri.String())
+		if uri.IsAbs() && (uri.Scheme != "http" && uri.Scheme != "https") {
+			stlog.Debug("os package: OS package URL: unsupported scheme in %s", pkgURL)
 
-			return nil, fmt.Errorf("invalid package URL %q, missing or unsupported scheme", pkgURL)
+			return nil, fmt.Errorf("invalid package URL %q, unsupported scheme", pkgURL)
 		}
 
 		osp.descriptor.PkgURL = pkgURL
@@ -104,7 +104,7 @@ func CreateOSPackageCtx(ctx context.Context, label, pkgURL, kernel, initramfs, c
 	}
 
 	if err := osp.validate(); err != nil {
-		return nil, fmt.Errorf("OS package faield to validate: %w", err)
+		return nil, fmt.Errorf("OS package failed to validate: %w", err)
 	}
 
 	return osp, nil