I'm trying to install a git version of heckle using bundler.
At first I tried
gem "heckle", :github => 'phiggins/heckle', :branch => "ruby_parser"
But that didn't work, with
Could not find gem 'heckle (>= 0) ruby' in git://github.com/phiggins/heckle.git (at master).
Source does not contain any versions of 'heckle (>= 0) ruby'
I then specified the version of heckle, as per https://stackoverflow.com/a/3952045/38765 but bundler doesn't try installing any dependencies of heckle:
$ bundle exec heckle
gives me
cannot load such file -- ruby_parser (LoadError)
How do I tell bundler to find heckle's dependencies when there isn't a .gemspec?