Contents

module Rake

  #
  # Simple helper class for maintaining a Version number within a Rakefile.
  # Provides an easy way increase the version tags. Supports purely numeric
  # version tags only.
  #
  class Version

      def self.increment( symbol )
          Version.new.increment symbol
      end

      def initialize( config = {} )
          @config = config
          @config[ :version_file ] ||= 'Version'
          @config[ :version_regex ] ||= /\A(\d+)\.(\d+).(\d+)\Z/
          @config[ :version_tags ] ||= [ :release, :version, :build ]
          @tag_values = {}
          read
      end

      def increment( symbol )
          raise "Unknown tag: #{symbol}" unless version_tags.include? symbol
          read
          @tag_values[ symbol ] += 1
          write
          current_version
      end

      def current_version
          version_tags.map { |tag| @tag_values[ tag ] }.join( '.' )
      end

      alias version current_version

      alias to_s version

      private

      def read
          version = IO.read version_file
          raise "Error reading #{version_file}" unless version_regex =~ version
          version_tags.each_index do |idx|
              @tag_values[ version_tags[ idx ] ] = Regexp.last_match[ 1 + idx ].to_i
          end
          self
      end

      def write
          File.open( version_file, 'w' ) do |file|
              file.write current_version
          end
          self
      end

      def version_file
          @config[ :version_file ]
      end

      def version_regex
          @config[ :version_regex ]
      end

      def version_tags
          @config[ :version_tags ]
      end

  end

end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
BitStructEx-0.0.54	lib/ruby/rake/version.rb
BitStructEx-0.0.64	lib/ruby/rake/version.rb