fix error on missing files

editorconfig/source_file_finder.go

@@ -69,6 +69,21 @@ func FindSourceFiles(searchPaths []string) ([]string, error) {
 			return nil, cli.NewExitError(errMessage, 2)
 		}
 
+		// Check if this is a specific file path (exists and is a file)
+		if fileInfo, err := os.Stat(searchPath); err == nil && !fileInfo.IsDir() {
+			// Don't run on files inside dot directories.
+			if !containsDotDirectoryRegex.MatchString(searchPath) {
+				// For explicitly specified files, always include them regardless of extension
+				files = append(files, searchPath)
+			}
+			continue
+		}
+
+		// If the file doesn't exist, skip it silently (don't error out)
+		if _, err := os.Stat(searchPath); err != nil {
+			continue
+		}
+
 		_ = filepath.Walk(searchPath, func(path string, fileInfo os.FileInfo, err error) error {
 			// Don't add paths that don't exist.
 			if err != nil {