emacs自动添加文件头

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

(setq auto-insert-query nil) ;; 不提醒

自定义文件头

(setq auto-insert-alist
      '(((python-mode . "Python program") nil
         "#!/usr/bin/env python\n"
         "# -*- coding: utf-8 -*-\n"
         "# **************************************************************************\n"
         "# Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
         "# File Name: " (file-name-nondirectory buffer-file-name) "\n"
         "# Author: " (user-full-name)"\n"
         "# Email: " user-mail-address "\n"
         "# Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
         "# Last Update: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
         "#          By: \n"
         "# Description: \n"
         "# **************************************************************************\n")
        ((c-mode . "C program") nil
         "/**************************************************************************\n"
         " Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
         " File Name: " (file-name-nondirectory buffer-file-name) "\n"
         " Author: " (user-full-name)"\n"
         " Email: " user-mail-address "\n"
         " Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
         " Last Update: \n"
         "           By: \n"
         " Description: \n"
         " **************************************************************************/\n"
         "#include<stdio.h>\n"
         "#include<string.h>\n")
        ((sh-mode . "Shell script") nil
         "#!/bin/bash\n"
         "# **************************************************************************\n"
         "# Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
         "# File Name: " (file-name-nondirectory buffer-file-name) "\n"
         "# Author: " (user-full-name)"\n"
         "# Email: " user-mail-address "\n"
         "# Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
         "# Last Update: \n"
         "#          By: \n"
         "# Description: \n"
         "# **************************************************************************/\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

  (defun maple//insert-string()
    (concat
     (make-string 80 ?*)
     "\n"
     "Copyright © " (substring (current-time-string) -4) " " (user-full-name) "\n"
     "File Name: " (file-name-nondirectory buffer-file-name) "\n"
     "Author: " (user-full-name)"\n"
     "Email: " user-mail-address "\n"
     "Created: " (format-time-string "%Y-%m-%d %T (%Z)" (current-time)) "\n"
     "Last Update: \n"
     "         By: \n"
     "Description: \n"
     (make-string 80 ?*)))

• 插入注释信息 <2018-03-16 五>更新:

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

  原代码:

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

• 更改模板

  (setq auto-insert-alist
        '(((ruby-mode . "Ruby program") nil
           "#!/usr/bin/env ruby\n"
           "# -*- encoding: utf-8 -*-\n"
           (maple/insert-string) "\n")
          ((python-mode . "Python program") nil
           "#!/usr/bin/env python\n"
           "# -*- coding: utf-8 -*-\n"
           (maple/insert-string) "\n")
          ((c-mode . "C program") nil
           "/*"
           (string-trim-left (maple/insert-string " ")) "*/\n"
           "#include<stdio.h>\n"
           "#include<string.h>\n")
          ((sh-mode . "Shell script") nil
           "#!/bin/bash\n"
           (maple/insert-string) "\n")
          ((go-mode . "Go program") nil
           "/*"
           (string-trim-left (maple/insert-string " ")) "*/\n")))

相关的配置可以在我的github上找到