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Note: This guide is not for cygwin, and assumes you have installed Ruby via the one-click installer.

Ruby Development Kit

You can skip this step if you already have this installed.

  1. Download the Ruby Development Kit from here:
  2. Unpack it somewhere (e.g. C:\RubyDevKit)
  3. cd to where you unpacked it too
  4. Run dk.rb init. This will generate a config.yml file that details the list of Rubies found on your system. You can configure this before installing if need be. Run dk.rb review to review the install
  5. Finally run dk.rb install.

For more information see

Installing RMagick and ImageMagick

The following guide is for Ruby 1.9

  1. Download ImageMagick from here: e.g. ImageMagick-6.7.6-6-Q16-windows-dll.exe at the time of writing. N.B. ImageMagick x64 doesn't build with the rubygem, use the regular release
  2. Install to a path without spaces. E.g. C:\ImageMagick
  3. Make sure Add application directory to your system path and Install development headers and libraries for C and C++ are checked: ImageMagick installation
  4. Close and reopen Command Prompt to reload your PATH variables (you can run PATH or convert -v to ensure ImageMagick is there)
  5. Run the following command (replacing the location of ImageMagick on your system if you opted for something different):
gem install rmagick --platform=ruby -- --with-opt-dir=C:\ImageMagick

It will take a while to build the native extensions, but it should install it cleanly now.

If you run into any issues, there's probably a solution on Google.


Woo, all the prerequisites have been taken care of, now all you need to do is install lolcommits:

gem install lolcommits
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