class Bundler::CLI::Pristine

def initialize(gems)
  @gems = gems
end

def run
  CLI::Common.ensure_all_gems_in_lockfile!(@gems)
  definition = Bundler.definition
  definition.validate_runtime!
  installer = Bundler::Installer.new(Bundler.root, definition)
  Bundler.load.specs.each do |spec|
    next if spec.name == "bundler" # Source::Rubygems doesn't install bundler
    next if !@gems.empty? && !@gems.include?(spec.name)
    gem_name = "#{spec.name} (#{spec.version}#{spec.git_version})"
    gem_name += " (#{spec.platform})" if !spec.platform.nil? && spec.platform != Gem::Platform::RUBY
    case source = spec.source
    when Source::Rubygems
      cached_gem = spec.cache_file
      unless File.exist?(cached_gem)
        Bundler.ui.error("Failed to pristine #{gem_name}. Cached gem #{cached_gem} does not exist.")
        next
      end
      FileUtils.rm_rf spec.full_gem_path
    when Source::Git
      if source.local?
        Bundler.ui.warn("Cannot pristine #{gem_name}. Gem is locally overridden.")
        next
      end
      source.remote!
      if extension_cache_path = source.extension_cache_path(spec)
        FileUtils.rm_rf extension_cache_path
      end
      FileUtils.rm_rf spec.extension_dir
      FileUtils.rm_rf spec.full_gem_path
    else
      Bundler.ui.warn("Cannot pristine #{gem_name}. Gem is sourced from local path.")
      next
    end
    Bundler::GemInstaller.new(spec, installer, false, 0, true).install_from_spec
  end
end