Improve visibility of the files with unsupported extensions

Author: IvanRibakov

addlicense/main.go

@@ -241,6 +241,7 @@ func processFile(f *file, t *template.Template, license LicenseData, checkonly b
 			return err
 		}
 		if lic == nil { // Unknown fileExtension
+			logger.Printf("[WARN] %s - unknown file extension", f.path)
 			return nil
 		}
 		// Check if file has a license
@@ -259,8 +260,12 @@ func processFile(f *file, t *template.Template, license LicenseData, checkonly b
 			logger.Printf("%s: %v", f.path, err)
 			return err
 		}
-		if verbose && modified {
-			logger.Printf("%s modified", f.path)
+		if verbose {
+			if modified {
+				logger.Printf("%s modified", f.path)
+			} else {
+				logger.Printf("[WARN] %s - unknown file extension", f.path)
+			}
 		}
 	}
 	return nil