脚本中的最终命令（sed 命令）不起作用

Question

我这里有一个脚本文件，叫做editfile.script:

#!/bin/bash

sed '{
1i \Game Commence\nAre You Ready???\ 
s/game/Game/g
s/points/Points/g
s/the\sthe/the/g 
/^ *$/d
$a It's time
}' "$1"

编辑这个名为GameOverview的文件

This game will begin in 3 minutes.
The objective is to score 10 points.
If you score 10 points, u move to the the next round

Good luck, may the the force b w u

现在，当我运行 .\editfile.script GameOverview（从 C shell）命令行时，我会收到以下输出：

Game Commence 
Are You Ready???
This Game will begin in 3 minutes.
The objective is to score 10 Points.
If you score 10 points, u move to the next round
Good luck, may the force b w u

如您所见，每个命令都已执行：除了追加命令$a It's time。为什么会发生这种情况，以及如何解决？而且我相信它与前面的“删除所有空白行”命令/^ *$/d有关，因为当我摆脱它时，附加了“是时候”了：

Game Commence 
Are You Ready???
This Game will begin in 3 minutes.
The objective is to score 10 Points.
If you score 10 points, u move to the next round

Good luck, may the force b w u
It's time

Answer 1

问题是您要附加的字符串中的单引号It's time。它结束了 sed 命令的开头单引号。

你可以通过结束第一个引号得到一个单引号，把你的单引号放在双引号之间，然后开始另一个单引号字符串：

$a It'"'"'s time

为完全避免该问题，您可以将 sed 命令放入单独的文件中，而不是将其包装在 shell 脚本中：

$ cat sedscr.sed
1i\
Game Commence\nAre You Ready???
s/game/Game/g
s/points/Points/g
s/the\sthe/the/g
/^ *$/d
$a\
It's time

我还将i 和a 命令分成两行，这应该是发出这些命令的最便携的方式。

你可以这样称呼它：

$ sed -f sedscr.sed GameOverview
Game Commence
Are You Ready???
This Game will begin in 3 minutes.
The objective is to score 10 Points.
If you score 10 Points, u move to the next round
Good luck, may the force b w u
It's time

这样，你不必特殊对待单引号。