prune_cache is pruning folder that doesn't exist.

[orta]

I'm downloading with these options { :git => "https://github.com/0xced/ABGetMe.git", :tag => "1.0.0" } and the gem is correctly cloning but at the end its trying to access a folder that doesn't exist.

spec = eval( File.open(podfile_file_path).read )
download_location = current_dir + "/download/#{spec.name}/#{spec.version}"

unless File.exists? download_location
  downloader = Pod::Downloader.for_target(download_location, spec.source)
  downloader.cache_root = ''
  downloader.max_cache_size = 500
  downloader.download  
end

Updating cache git repo (/Volumes/Cache/orta/spiel/html/cocoadocs-host/GitHub/40a05edf506a6dcfcce5f1353a001b55f4467cd9)
Fetching origin
Initialized empty Git repository in /Volumes/Cache/orta/spiel/html/cocoadocs-host/download/ABGetMe/1.0.0/.git/

From /Volumes/Cache/orta/spiel/html/cocoadocs-host/GitHub/40a05edf506a6dcfcce5f1353a001b55f4467cd9
 * tag               1.0.0      -> FETCH_HEAD
HEAD is now at 8d8d7ca Add MIT license file
Switched to a new branch 'activated-pod-commit'
/Volumes/Cache/orta/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/pathname.rb:397:in `open': No such file or directory - /Volumes/Cache/orta/spiel/html/cocoadocs-host/GitHub/GitHub (Errno::ENOENT)
    from /Volumes/Cache/orta/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/pathname.rb:397:in `foreach'
    from /Volumes/Cache/orta/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/pathname.rb:397:in `children'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/base.rb:185:in `block in prune_cache'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/base.rb:184:in `chdir'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/base.rb:184:in `prune_cache'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/base.rb:102:in `block in download'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/api.rb:43:in `ui_action'
    from /Volumes/Cache/orta/.rvm/gems/ruby-1.9.3-p385/gems/cocoapods-downloader-0.1.0/lib/cocoapods-downloader/base.rb:99:in `download'
    from Rakefile:26:in `<main>'

[fabiopelosin]

This line https://github.com/CocoaPods/cocoapods-downloader/blob/master/lib/cocoapods-downloader/base.rb#L160 should be updated to something like:

Pathname.new(File.expand_path(Pathname.pwd + cache_root)) + name