Fix file creation for output options (#875)

cmd/attest.go

@@ -153,11 +153,11 @@ func attestExec(ctx context.Context, _ *cobra.Command, args []string) error {
 		return fmt.Errorf("attest command can only be used with image sources fetch directly from the registry, but discovered an image source of %q when given %q", si.ImageSource, userInput)
 	}
 
-	if len(appConfig.Output) > 1 {
+	if len(appConfig.Outputs) > 1 {
 		return fmt.Errorf("unable to generate attestation for more than one output")
 	}
 
-	format := syft.FormatByName(appConfig.Output[0])
+	format := syft.FormatByName(appConfig.Outputs[0])
 	predicateType := formatPredicateType(format)
 	if predicateType == "" {
 		return fmt.Errorf("could not produce attestation predicate for given format: %q. Available formats: %+v", formatAliases(format.ID()), formatAliases(attestFormats...))

cmd/output_writer.go

@@ -58,10 +58,7 @@ func parseOptions(outputs []string, defaultFile string) (out []sbom.WriterOption
 			continue
 		}
 
-		out = append(out, sbom.WriterOption{
-			Format: format,
-			Path:   file,
-		})
+		out = append(out, sbom.NewWriterOption(format, file))
 	}
 	return out, errs
 }

cmd/packages.go

@@ -222,7 +222,7 @@ func validateInputArgs(cmd *cobra.Command, args []string) error {
 }
 
 func packagesExec(_ *cobra.Command, args []string) error {
-	writer, err := makeWriter(appConfig.Output, appConfig.File)
+	writer, err := makeWriter(appConfig.Outputs, appConfig.File)
 	if err != nil {
 		return err
 	}

cmd/power_user.go

@@ -73,10 +73,12 @@ func powerUserExec(_ *cobra.Command, args []string) error {
 	// could be an image or a directory, with or without a scheme
 	userInput := args[0]
 
-	writer, err := sbom.NewWriter(sbom.WriterOption{
-		Format: syftjson.Format(),
-		Path:   appConfig.File,
-	})
+	writer, err := sbom.NewWriter(
+		sbom.NewWriterOption(
+			syftjson.Format(),
+			appConfig.File,
+		),
+	)
 	if err != nil {
 		return err
 	}