module Jeweler::Specification

def self.filelist_attribute(name)
  code = %{
    def #{name}
      if @#{name} && @#{name}.class != FileList
        @#{name} = FileList[@#{name}]
      end
      @#{name} ||= FileList[]
    end
    def #{name}=(value)
      @#{name} = FileList[value]
    end
  }
  module_eval code, __FILE__, __LINE__ - 9
end

def blank?(value)
  value.nil? || value.empty?
end

def bundler_dependencies_for(bundler_runtime, *groups)
  if groups.empty?
    bundler_runtime.dependencies
  else
    bundler_runtime.dependencies.select {|d| (groups & d.groups).any? }
  end
end

def ruby_code(obj)
  case obj
  when Rake::FileList then obj.uniq.to_a.inspect
  else super
  end
end

def set_jeweler_defaults(base_dir, git_base_dir = nil)
  base_dir = File.expand_path(base_dir)
  git_base_dir = if git_base_dir
                   File.expand_path(git_base_dir)
                 else
                   base_dir
                 end
  can_git = git_base_dir && base_dir.include?(git_base_dir) && File.directory?(File.join(git_base_dir, '.git'))
  Dir.chdir(git_base_dir) do
    repo = if can_git
             require 'git'
             Git.open(git_base_dir)
           end
    if blank?(files) && repo
      base_dir_with_trailing_separator = File.join(base_dir, '')
      ignored_files = repo.lib.ignored_files + ['.gitignore']
      self.files = (repo.ls_files(base_dir).keys - ignored_files).compact.map do |file|
        File.expand_path(file).sub(base_dir_with_trailing_separator, '')
      end
    end
    if blank?(executables) && repo
      self.executables = (repo.ls_files(File.join(base_dir, 'bin')).keys - repo.lib.ignored_files).map do |file|
        File.basename(file)
      end
    end
    if blank?(extensions)
      self.extensions = FileList['ext/**/{extconf,mkrf_conf}.rb']
    end
    if blank?(extra_rdoc_files)
      self.extra_rdoc_files = FileList['README*', 'ChangeLog*', 'LICENSE*', 'TODO']
    end
    if File.exist?('Gemfile')
      require 'bundler'
      bundler_runtime = Bundler.load
      bundler_dependencies_for(bundler_runtime, :default, :runtime).each do |dependency|
        add_dependency dependency.name, *dependency.requirement.as_list
      end
      bundler_dependencies_for(bundler_runtime, :development).each do |dependency|
        add_development_dependency dependency.name, *dependency.requirement.as_list
      end
    end
  end
end