Contents

require "optimist"
require "rubygems/commands/install_command"

module RBEMigrate
  class CLI
    def initialize
      @options = Optimist::options do
        version "rbenv-migrate #{File.read(File.expand_path("../../VERSION", __FILE__)).strip}"
        banner self.version
        banner "Usage:"
        banner "  rbenv-migrate OLD_VERSION"
        banner "\nOptions:"
        opt :version, "display version number"
        opt :help, "display this message"
        educate_on_error
      end

      @old_version = ARGV.first

      if @old_version.nil? || @old_version == RUBY_VERSION ||
         !Dir["#{ENV['RBENV_ROOT']}/versions/**"].map { |f| File.basename f }.include?(@old_version)
        Optimist::educate
      end
    end

    def run
      old_gems = gemspecs_for(@old_version).select do |gem|
        if gem.required_ruby_version =~ Gem::Version.new(RUBY_VERSION)
          true
        else
          $stderr.puts "#{gem.name} #{gem.version} is not compatible with Ruby #{RUBY_VERSION}, skipping."
          false
        end
      end.map(&:name)

      current_gems = gemspecs_for(RUBY_VERSION).map(&:name)

      if (gems_to_install = old_gems - current_gems).any?
        command = Gem::Commands::InstallCommand.new.tap { |c| c.handle_options gems_to_install }
      else
        puts "Your gems in #{RUBY_VERSION} appear to be up-to-date with #{@old_version}."
        exit
      end

      begin
        command.execute
      rescue Gem::SystemExitException
        # Done
        nil
      end
    end

    private

    def gemspecs_for(version)
      gemspecs = "#{ENV['RBENV_ROOT']}/versions/#{version}/lib/ruby/gems/*/specifications/*.gemspec"
      Dir.glob(File.join gemspecs).map { |s| Gem::Specification.load(s) }
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
rbenv-migrate-0.2.1	lib/rbenv_migrate.rb
rbenv-migrate-0.2	lib/rbenv_migrate.rb