[#154] Improve UX for rejected / allowed files

Signed-off-by: Knut Ahlers <knut@ahlers.me>

cmd/ots-cli/cmd_create.go

@@ -45,6 +45,8 @@ func init() {
 }
 
 func createRunE(cmd *cobra.Command, _ []string) (err error) {
+	cmd.SilenceUsage = true
+
 	var secret client.Secret
 
 	if client.HTTPClient, err = constructHTTPClient(cmd); err != nil {

cmd/ots-cli/cmd_fetch.go

@@ -16,7 +16,7 @@ import (
 const storeFileMode = 0o600 // We assume the attached file to be a secret
 
 var fetchCmd = &cobra.Command{
-	Use:   "fetch url",
+	Use:   "fetch <url>",
 	Short: "Retrieves a secret from the instance by its URL",
 	Long:  "",
 	Args:  cobra.ExactArgs(1),
@@ -39,6 +39,8 @@ func checkDirWritable(dir string) error {
 }
 
 func fetchRunE(cmd *cobra.Command, args []string) error {
+	cmd.SilenceUsage = true
+
 	fileDir, err := cmd.Flags().GetString("file-dir")
 	if err != nil {
 		return fmt.Errorf("getting file-dir parameter: %w", err)

pkg/client/sanity.go

@@ -73,12 +73,15 @@ func SanityCheck(instanceURL string, secret Secret) error {
 
 func attachmentAllowed(file SecretAttachment, allowed []string) bool {
 	mimeType, _, _ := strings.Cut(file.Type, ";")
+	logger := Logger.WithField("content-type", mimeType)
+
 	for _, a := range allowed {
 		switch {
 		case mimeRegex.MatchString(a):
 			// That's a mime type
 			if glob.Glob(a, mimeType) {
 				// The mime "glob" matches the file type
+				logger.WithField("allowed_by", a).Debug("attachment allowed")
 				return true
 			}
 
@@ -86,12 +89,13 @@ func attachmentAllowed(file SecretAttachment, allowed []string) bool {
 			// That's a file extension
 			if strings.HasSuffix(file.Name, a) {
 				// The filename has the right extension
+				logger.WithField("allowed_by", a).Debug("attachment allowed")
 				return true
 			}
 		}
 	}
 
-	Logger.WithField("content-type", mimeType).Debug("attachment type not allowed")
+	logger.Debug("attachment type not allowed")
 	return false
 }