如何在跨多行的模式之後插入一行文件

Question

我想在第一次使用bash顯示此模式時插入一行。我該怎麼去做呢？我想嘗試使用模式來匹配位置/ {*}

location/{ 
      # First attempt to serve request as file, then 
      # as directory, then fall back to displaying a 404. 
      try_files $uri $uri/ =404; 
      # Uncomment to enable naxsi on this location 
      # include /etc/nginx/naxsi.rules 
    } 

，我希望它成爲

location/{ 
      # First attempt to serve request as file, then 
      # as directory, then fall back to displaying a 404. 
      try_files $uri $uri/ =404; 
      # Uncomment to enable naxsi on this location 
      # include /etc/nginx/naxsi.rules 
    } 
    location /hbnb_static 

謝謝，我會很感激的幫助。

Answer 1

我嘗試了Perl的一行程序：

perl -e '$s.=$_ while <>; $s=~s|location/\{.*?\}|$&\n location /hbnb_static|s; print $s' inputfile 

一些說明：

• 啜食的inputfile成可變$s
• 的s正則表達式改性劑使得.匹配換行符以及
• .*?很懶，所以在遇到後續的時會停止
• 我假設你想在插入的行前插入4個空格縮進。
• 打印結果到stdout

使成一個bash腳本讀取STDIN或在命令行上的文件這一點，並打印修改後的文本到stdout：

#!/bin/bash 
perl -e '$s.=$_ while <>; $s=~s|location/\{.*?\}|$&\n location /hbnb_static|s; print $s' $1