Emacs：.emacs中延迟加载模式的最佳实践？ [英] Emacs: Best-practice for lazy loading modes in .emacs?

问题描述

遇到相关文件扩展名时，是否有关于延迟加载模式的最佳实践？

Is there a best practice around lazily loading modes when encountering a relevant file extension?

此时，我安装了大约25种不同的Emacs模式，启动变慢了。例如，虽然有很好的clojure模式准备好了，我很少使用它，我想避免加载它，除非我打开一个扩展名为.clj的文件。这样的懒惰需求功能似乎是正确的方式做模式配置一般..

At this point I have roughly 25 different Emacs modes installed, and startup has become slow. For example, although it's great to have clojure-mode at the ready, I rarely use it, and I want to avoid loading it at all unless I open a file with extension .clj. Such a "lazy require" functionality seems like the right way do mode configuration in general..

我没有在网上发现，所以我自己采取了一个裂缝。

I found nothing online, so I've taken a crack at it myself.

而不是：

(require 'clojure-mode)
(require 'tpl-mode) 

我有这个：

(defun lazy-require (ext mode)
  (add-hook
   'find-file-hook
   `(lambda ()
      (when (and (stringp buffer-file-name)
                 (string-match (concat "\\." ,ext "\\'") buffer-file-name))
        (require (quote ,mode))
        (,mode)))))

(lazy-require "soy" 'soy-mode)
(lazy-require "tpl" 'tpl-mode)

一个elisp新手，所以评论是欢迎！），但我不知道在网上找不到任何关于这个话题。这是一个合理的方法吗？

This seems to work (I'm an elisp newbie so comments are welcome!), but I'm unnerved about finding nothing written about this topic online. Is this a reasonable approach?

推荐答案

您想要的工具名为自动加载。 clojure-mode 源文件， clojure-mode.el ，包括如何安排此注释：

The facility you want is called autoloading. The clojure-mode source file, clojure-mode.el, includes a comment for how to arrange this:

;;     Add these lines to your .emacs:
;;       (autoload 'clojure-mode "clojure-mode" "A major mode for Clojure" t)
;;       (add-to-list 'auto-mode-alist '("\\.clj$" . clojure-mode))

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