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.
With sed, append (a) the desired portion after match (here i am matching < ApplicationRecord at the end of the line):
sed '/<[[:blank:]]*ApplicationRecord$/a\ include Company' file.rb To edit the file in-place with original one backed up with a .bak extension:
sed -i.bak '/<[[:blank:]]*ApplicationRecord$/a\ include Company' file.rb Without any backup:
sed -i '' '/<[[:blank:]]*ApplicationRecord$/a\ include Company' file.rb Example:
$ cat file.rb class User < ApplicationRecord end $ sed '/<[[:blank:]]*ApplicationRecord$/a\ include Company' file.rb class User < ApplicationRecord include Company end On OSX you can use this sed command:
sed -i.bak '/ApplicationRecord$/,/^end$/{/end$/i\ include Company }' file