module Reap

  class Project

    # Update VERSION stamp file.
    #
    # This file is either called VERSION, or meta/version
    # (case-insensitive and with optional .txt extension).
    #
    # The format of the files is:
    #
    #   x.y.z status (date)
    #
    # For exmaple:
    #
    #   1.2.4 alpha (2008-10-10)
    #
    # On the command line:
    #
    #    --major    will bump the major number
    #    --minor    will bump the minor number
    #    --tiny     will bump the tiny  number
    #    --teeny    will bump the teeny number
    #
    # One can alternately specify the entire version:
    #
    #   --version=x.y.z
    #
    # As well as status:
    #
    #   --status=(alpha, beta, rc1, rc2, ...)
    #
    # TODO: Should we also update a lib/version.rb file?
    # TODO: Considerding createing a standard status marker (a=alpha, b=beta, r=release candidate)
    #       So a version would read, eg. 1.2.4a, or with status number, eg. 1.2.4r1).

    def stamp(options={})
      version = options['version']
      status  = options['status']

      bumps = [ options['major'], options['minor'], options['tiny'], options['teeny'] ]
      bump  = bumps.any?{|x|x}

      abort "Specify bumps or version, not both." if bump and version

      #options = configure_options(options, 'stamp')

      version = version || metadata.version || '0.0.0'
      status  = status  || metadata.status  || '0.0.0'

      if bump
        points = []
        version.to_s.split(/[.]/).each_with_index do |x, i|
          points[i] = (bumps[i] ? x.to_i + 1 : x).to_s
        end
        version = points.join('.').sub(/[.0]$/,'')
      else
        abort "Invalid version -- #{version}" unless String===version && /^[0-9]/ =~ version
      end

      meta = File.directory?('meta')

      file = glob('{,meta/}version{,.txt}', File::FNM_CASEFOLD).first
      file = (meta ? 'meta/version' : 'VERSION') unless file

      text = "#{version} #{status} (#{Time.now.strftime('%Y-%m-%d')})"

      if File.exist?(file)
        old_text = File.read(file).strip
        old_version, old_status, old_date = *old_text.split(/\s/)
        if old_version == "#{version}" && old_status == status
          puts old_text
          return
        end
      end

      if dryrun?
        puts "echo '#{text}' > #{file}"
      else
        write(file, text)
        puts text
        puts "#{file} updated."

        metadata.version  = version
        metadata.status   = status
        metadata.released = Time.now
      end

      # TODO: Stamp .roll if roll file exists.
      # should we read current .roll file and use as defaults?
      if File.exist?('.roll')
        str = []
        str << "name    = #{metadata.name}"
        str << "version = #{metadata.version}"
        str << "status  = #{metadata.status}"
        str << "date    = #{metadata.date}"
        str << "default = #{metadata.default}"
        str << "libpath = #{metadata.libpath}"
        # File.open('.roll','w'){ |f| f << str.join("\n") }
      end
    end

  end

end