Rip Audio CD on Linux / Debian / Ubuntu in command line

rip_cd_audio.rb

#!/usr/bin/env ruby
#
# Convert CD to mp3 on Linux
#
# reference: https://www.cyberciti.biz/faq/linux-ripping-and-encoding-audio-files/
#
# Run extraction with
#   cdparanoia -B
#
# Convert wav to mp3 with lame
#
# Dependency
#  - lame
#  - cdparanoia
#
# How to run ?
#
# Run this script where you want to extract the CD audio.

wav_files = Dir.glob('*.wav')

if wav_files.size == 0
 puts "no wave file found"
 puts "extract cd audio to wave files"
 puts `cdparanoia -B`
 wav_files = Dir.glob('*.wav')

 if wav_files.size == 0
  puts "oops no wav files extracted!"
  exit 1
 end
end

wav_files.each do |path|
 mp3_path = path.gsub(/\.wav$/, '.mp3')
 mp3_final_path = mp3_path.gsub('.cdda', '')

 if File.exist?(mp3_final_path)
  puts "skip #{path}"
  next
 end

 print "> #{path}..."
 `lame #{path}`
 `mv #{mp3_path} #{mp3_final_path}`
 puts "done"
end

puts "all files extracted"
exit 0