Ghelp 通用帮助

Emacs-general
2

怎么上手？比如，我需要在 Go Mode 中查看 Go 文档，可以从命令行获得文档

$ go doc -src os.Open
package os // import "os"

// Open opens the named file for reading. If successful, methods on
// the returned file can be used for reading; the associated file
// descriptor has mode O_RDONLY.
// If there is an error, it will be of type *PathError.
func Open(name string) (*File, error) {
	return OpenFile(name, O_RDONLY, 0)
}

假设我已经把这个命令封装成了函数。然后 ghelp-register-backend 怎么用？下面的 nil 是什么意思？

  (ghelp-register-backend 'python-mode
                          nil
                          #'ghelp-eglot--describe-symbol)