fix: includes/excludes and stdin

format/formatter.go

@@ -90,7 +90,18 @@ func (f *Formatter) Apply(ctx context.Context, files []*walk.File) error {
 
 	// append paths to the args
 	for _, file := range files {
-		args = append(args, file.RelPath)
+		// start with the path override, fallback to the normal path
+		path := file.PathToFormat
+		if path == "" {
+			path = file.RelPath
+		}
+
+		// sanity check that a path has been set
+		if path == "" {
+			return fmt.Errorf("file has no path: %v", file)
+		}
+
+		args = append(args, path)
 	}
 
 	// execute the command

walk/stdin.go

@@ -43,15 +43,16 @@ func (s StdinReader) Read(_ context.Context, files []*File) (n int, err error) {
 		return 0, fmt.Errorf("failed to get file info for temporary file: %w", err)
 	}
 
-	relPath, err := filepath.Rel(s.root, file.Name())
+	relPath, err := filepath.Rel(s.root, s.path)
 	if err != nil {
-		return 0, fmt.Errorf("failed to get relative path for temporary file: %w", err)
+		return 0, fmt.Errorf("failed to get relative path for file: %w", err)
 	}
 
 	files[0] = &File{
-		Path:    file.Name(),
-		RelPath: relPath,
-		Info:    info,
+		Path:         s.path,
+		RelPath:      relPath,
+		Info:         info,
+		PathToFormat: file.Name(),
 	}
 
 	// dump the temp file to stdout and remove it once the file is finished being processed

walk/walk.go

@@ -37,6 +37,9 @@ type File struct {
 	RelPath string
 	Info    fs.FileInfo
 
+	// PathToFormat is an optional override for Path, allowing us to match against Path but format PathToFormat.
+	PathToFormat string
+
 	// FormattedInfo is the result of os.stat after formatting the file.
 	FormattedInfo fs.FileInfo