Function visitFileMethods

tools/metadata/metadata.go:382–429

(updateFile bool, filename string, visit nodeVisitor)

}

func visitFileMethods(updateFile bool, filename string, visit nodeVisitor) error {
	content, err := os.ReadFile(filename)
	if err != nil {
		return err
	}
	content = bytes.ReplaceAll(content, []byte("\r\n"), []byte("\n"))

	fset := token.NewFileSet()
	fileNode, err := parser.ParseFile(fset, "", content, parser.ParseComments)
	if err != nil {
		return err
	}
	cmap := ast.NewCommentMap(fset, fileNode, fileNode.Comments)

	ast.Inspect(fileNode, func(n ast.Node) bool {
		fn, ok := n.(*ast.FuncDecl)
		if !ok {
			return true
		}
		serviceMethod := nodeServiceMethod(fn)
		if serviceMethod == "" {
			return true
		}
		e := visit(serviceMethod, fn, cmap)
		err = errors.Join(err, e)
		return true
	})
	if err != nil {
		return err
	}
	if !updateFile {
		return nil
	}
	fileNode.Comments = cmap.Filter(fileNode).Comments()
	var buf bytes.Buffer
	err = printer.Fprint(&buf, fset, fileNode)
	if err != nil {
		return err
	}
	updatedContent, err := format.Source(buf.Bytes())
	if err != nil {
		return err
	}
	if bytes.Equal(content, updatedContent) {
		return nil
	}
	return os.WriteFile(filename, updatedContent, 0o600)
}

var (
	metaOpRe  = regexp.MustCompile(`(?i)\s*//\s*meta:operation\s+(\S.+)`)