在bash的文件中的两行之间添加一行(Add a line in between two lines in a file from bash)

在bash的文件中的两行之间添加一行(Add a line in between two lines in a file from bash)

我有一个名为user.rb文件，如：

class User < ApplicationRecord end

我想添加一个新行，添加行后会看起来：

class User < ApplicationRecord include Company end

但是我想从bash脚本或终端添加这个额外的行。 我尝试使用这个bash代码：

sed -i '' 's/end/include Company\n\end/' app/models/user.rb

但添加线后它不会返回新行。 请帮帮我。

I have file named user.rb as like:

class User < ApplicationRecord end

I want to add a new line and after adding line it will look :

class User < ApplicationRecord include Company end

But I want to add this additional line from bash script or terminal. I tried it with this bash code:

sed -i '' 's/end/include Company\n\end/' app/models/user.rb

But it does not return new line after adding line. Please help me.

最满意答案

在OSX上，您可以使用此sed命令：

sed -i.bak '/ApplicationRecord$/,/^end$/{/end$/i\ include Company }' file

On OSX you can use this sed command:

sed -i.bak '/ApplicationRecord$/,/^end$/{/end$/i\ include Company }' file