Command line utility to replace file names

replacer

#!/usr/bin/env ruby

# Example:
#
# $ ./replacer foo bar *.*
#
# foo.app > bar.app
# foo.erl > bar.erl
# foo_app.erl > bar_app.erl
# foo_sup.erl > bar_sup.erl
# foo_deps.erl > bar_deps.erl
# foo_server.erl > bar_server.erl

from = ARGV[0]
to   = ARGV[1]

puts "Replacing '#{from}' to '#{to}' in the file names"

ARGV.each do |current_file|
  next if current_file == from or current_file == to
  next unless File.exist? current_file
  next unless current_file.include? from
  
  new_file = current_file.gsub(from, to)
  puts "#{current_file} > #{new_file}"
  File.rename current_file, new_file
end