How to install on MacOS 10.10 Yosemite

Starting with MacOS 10.10 Yosemite RubyCocoa is no longer bundled.

To get wkpdf working on Yosemite, do this on your terminal:

1. Install Ruby 1.8.7 through RVM with specific options:
   rvm install 1.8.7-head --debug --reconfigure -C --enable-shared=yes

2. Start using the newly installed ruby: rvm use 1.8.7

3. Install wkpdf gem install wkpdf and edit its bin nano /usr/bin/wkpdf so that in the first #! line it uses your newly installed ruby (do a which ruby and it should be something like ~/.rvm/rubies/ruby-1.8.7-head/bin/ruby) and not system ruby (which as of Yosemite is Ruby 2.0, which isn't compatible with RubyCocoa).

4. Download the latest RubyCocoa version:
   wget http://sourceforge.net/projects/rubycocoa/files/RubyCocoa/1.2.0/RubyCocoa-1.2.0.tar.gz/download RubyCocoa-1.2.0.tar.gz -O RubyCocoa-1.2.0.tar.gz

5. Uncompress into a folder and move into it: tar xzf RubyCocoa-1.2.0.tar.gz && rm RubyCocoa-1.2.0.tar.gz && cd RubyCocoa-1.2.0

6. Config the RubyCocoa installation: ruby install.rb config --target-archs="x86_64" (see this gist)

7. Setup & run the RubyCocoa installation:
   ruby install.rb setup
sudo ruby install.rb install

8. That's it, run wkpdf's help to test it works: wkpdf --help