Multifile replacer by Narzew

# Multifile replacer v 1.00 by Narzew
# Usage:
# replace.rb is name of this script
# replace.rb directory oldphrase newphrase
# for example:
# replace.rb dira lorem kek
# will replace all occurences of word 'lorem' in all files in 'dira' directory by word 'kek'
# Make backup of files in targetting directory before using this script, because it will modify all files within that directory!
# (C) Narzew, 30.12.2016
# Share where you want but keep original credits!
require 'find'
dir = ARGV[0]
oldphrase = ARGV[1]
newphrase = ARGV[2]
unless Dir.exist?(dir) || ARGV.size != 3
    print "Multifile replacer by Narzew\nUsage:\nreplace.rb directory oldphrase newphrase\ndirectory - directory of all files\noldphrase - old phrase which be replaced\nnewphrase - this will be in place of oldphrase\n"
    exit
else
    print "Multifile replacer by Narzew\n"
end
Find.find(dir).each{|x|
    next if x == "." || x == ".." || File.directory?(x)
    lambda {
        data = File.read(x)
        File.open(x,'wb'){|w| w.write(data.gsub(oldphrase, newphrase)) }
        print "#{x} processed.\n"
    }.call rescue print "#{x} process failed.\n"
}