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#!/usr/bin/ruby # # Increments the number in Rails migrations from a given starting index. Run # this in the db/migrations directory only. # # Example: # # increment_migrations 3 RUN # # this would add 1 to to all your migrations from 003_create_XXXXX.rb onwards case ARGV.size when 1, 2 from_index = ARGV[0].to_i dir = Dir.new('.') file_list = dir.to_a.sort file_list.each do |fn| if fn =~ /(\d{3})(.*\.rb)/ index = $1.to_i if index >= from_index index += 1 new_name = case index.to_s.length when 1 "00#{index}#{$2}" when 2 "0#{index}#{$2}" else "#{index}#{$2}" end puts "Converting '#{fn}' to '#{new_name}'" File.rename fn, new_name if ARGV[1] == "RUN" else puts "Skipping '#{fn}'" end else puts "Ignoring '#{fn}'" end end else puts "Usage: #{$0} <number> [RUN]" puts " where" puts " number - migration number to start from (mandatory)" puts " RUN - add to run to make the changes (default does not rename)" end

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