想要在emacs中添加文件头有好几种方法:

• 直接手打

• 使用模板yasnippet

• 使用header2

• 使用内置的package auto-insert

header2可能是最方便的一种自动添加文件头的方式，但我之前使用过，想要自定义自己想要的内容很难，而且白白浪费header2的功能

今天主要说一说emacs内置里auto-insert,使用它在创建文件时自动添加文件头信息

基础使用

直接(auto-insert-mode) 并且设置

1(setq auto-insert-query nil) ;; 不提醒

自定义文件头

 1(setq auto-insert-alist
 2      '(((python-mode . "Python program") nil
 3         "#!/usr/bin/env python\n"
 4         "# -*- coding: utf-8 -*-\n"
 5         "# **************************************************************************\n"
 6         "# Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
 7         "# File Name: " (file-name-nondirectory buffer-file-name) "\n"
 8         "# Author: " (user-full-name)"\n"
 9         "# Email: " user-mail-address "\n"
10         "# Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
11         "# Last Update: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
12         "#          By: \n"
13         "# Description: \n"
14         "# **************************************************************************\n")
15        ((c-mode . "C program") nil
16         "/**************************************************************************\n"
17         " Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
18         " File Name: " (file-name-nondirectory buffer-file-name) "\n"
19         " Author: " (user-full-name)"\n"
20         " Email: " user-mail-address "\n"
21         " Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
22         " Last Update: \n"
23         "           By: \n"
24         " Description: \n"
25         " **************************************************************************/\n"
26         "#include<stdio.h>\n"
27         "#include<string.h>\n")
28        ((sh-mode . "Shell script") nil
29         "#!/bin/bash\n"
30         "# **************************************************************************\n"
31         "# Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
32         "# File Name: " (file-name-nondirectory buffer-file-name) "\n"
33         "# Author: " (user-full-name)"\n"
34         "# Email: " user-mail-address "\n"
35         "# Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
36         "# Last Update: \n"
37         "#          By: \n"
38         "# Description: \n"
39         "# **************************************************************************/\n")))

提取文件头公共信息

之前的模板有很多重复的内容，写一个函数把公共的信息提取出来

• 基础信息

   1(defun maple//insert-string()
   2  (concat
   3   (make-string 80 ?*)
   4   "\n"
   5   "Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
   6   "File Name: " (file-name-nondirectory buffer-file-name) "\n"
   7   "Author: " (user-full-name)"\n"
   8   "Email: " user-mail-address "\n"
   9   "Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
  10   "Last Update: \n"
  11   "         By: \n"
  12   "Description: \n"
  13   (make-string 80 ?*)))

• 插入注释信息 <2018-03-16 五>更新:

  1(defun maple/insert-string(&optional prefix)
  2  (replace-regexp-in-string
  3   "^" (or prefix comment-start)
  4   (maple//insert-string)))

  原代码:

  1(defun maple/insert-string(&optional prefix)
  2  (or prefix (setq prefix comment-start))
  3  (mapconcat
  4   (lambda (x) (concat prefix x))
  5   (split-string (maple//insert-string) "\n") "\n"))

• 更改模板

   1(setq auto-insert-alist
   2      '(((ruby-mode . "Ruby program") nil
   3         "#!/usr/bin/env ruby\n"
   4         "# -*- encoding: utf-8 -*-\n"
   5         (maple/insert-string) "\n")
   6        ((python-mode . "Python program") nil
   7         "#!/usr/bin/env python\n"
   8         "# -*- coding: utf-8 -*-\n"
   9         (maple/insert-string) "\n")
  10        ((c-mode . "C program") nil
  11         "/*"
  12         (string-trim-left (maple/insert-string " ")) "*/\n"
  13         "#include<stdio.h>\n"
  14         "#include<string.h>\n")
  15        ((sh-mode . "Shell script") nil
  16         "#!/bin/bash\n"
  17         (maple/insert-string) "\n")
  18        ((go-mode . "Go program") nil
  19         "/*"
  20         (string-trim-left (maple/insert-string " ")) "*/\n")))

相关的配置可以在我的github上找到