Normalizing line endings in Ruby

Question

I have a string in Ruby, s (say) which might have any of the standard line endings (\\n, \\r\\n, \\r). I want to convert

Answer 1

Best is just to handle the two cases that you want to change specifically and not try to get too clever:

s.gsub /\r\n?/, "\n"

Answer 2

I think the cleanest solution would be to use a regular expression:

s.gsub! /\r\n?/, "\n"

Answer 3

Try opening them on NetBeans IDE - Its asked me before, on one of the projects I've opened from elsewhere, if I wanted to fix the line endings. I think there might be a menu option to do it too, but that would be the first thing I would try.

Answer 4

Since ruby 1.9 you can use String::encode with universal_newline: true to get all of your new lines into \n while keeping your encoding unchanged:

s.encode(s.encoding, universal_newline: true)

Once in a known newline state you can freely convert back to CRLF using :crlf_newline. eg: to convert a file of unknown (possibly mixed) ending to CRLF (for example), read it in binary mode, then :

s.encode(s.encoding, universal_newline: true).encode(s.encoding, crlf_newline: true)