migrate.rb

#!/usr/bin/env ruby
# Script to help with rails migrations


cmd = "rake db:migrate"

rev = ARGV[0].to_i

if rev > 0
  cmd << " VERSION=#{rev}"
elsif rev == -1
  versions = []

  Dir["db/migrate/*.rb"].each do |f|
    if File.basename(f) =~ /^(\d+)/
      versions << $1.to_i
    end
  end

  rev = versions.sort.reverse
  rev.shift
  cmd << " VERSION=#{rev.first}"
end

puts cmd
system(cmd)