A virtual machine for using rake-compiler.
rake-compiler is totally awesome, and you should be using it if you maintain a Ruby gem with C or Java extensions to build native binaries for your users.
However, getting your local environment set up to build for all the assorted platforms can be a pain. Thankfully, we have the amazing tool Vagrant for "lightweight, reproducible, and portable development environments."
rake-compiler + Vagrant = easy native gems for all.
How to Build the Virtual Machine
$ git clone https://github.com/tjschuck/rake-compiler-dev-box.git $ cd rake-compiler-dev-box $ vagrant up
That's it! Go grab a cup of coffee, though -- it can take a couple of minutes to build the first time.
Building Your Native Gems
Once you have your gem ready to package, clone or move your repo into the same directory as the rake-compiler-dev-box:
$ pwd /Users/tjschuck/Code/rake-compiler-dev-box $ git clone firstname.lastname@example.org:codahale/bcrypt-ruby.git Cloning into 'bcrypt-ruby'... [...], done.
Now fire up your virtual machine (if you haven't already):
$ vagrant up
And SSH in:
$ vagrant ssh
You'll now be inside the virtual machine. The directory on your host machine with your gem in it and the scripts to build it will be mounted at
vagrant@precise64:~$ cd /vagrant vagrant@precise64:/vagrant$ ls bcrypt-ruby bin bootstrap.sh LICENSE.txt README.md sample_gem Vagrantfile
To build all gem binaries (native, Java, and Windows versions), run:
vagrant@precise64:/vagrant$ package_all YOUR_GEM'S_DIR_NAME
And wait for everything to build. Replace
YOUR_GEM'S_DIR_NAME with the correct value -- above, it would be
bcrypt-ruby. There's a
sample_gem dir in there as well if you'd like to experiment.
All of your gem binaries will be put into
vagrant@precise64:/vagrant$ ls bcrypt-ruby/pkg/ bcrypt-ruby-3.1.0 bcrypt-ruby-3.1.0-x86-linux.gem bcrypt-ruby-3.1.0.gem bcrypt-ruby-3.1.0-x86-mingw32 bcrypt-ruby-3.1.0-java bcrypt-ruby-3.1.0-x86-mingw32.gem bcrypt-ruby-3.1.0-java.gem bcrypt-ruby-3.1.0-x86-mswin32-60 bcrypt-ruby-3.1.0-x86-linux bcrypt-ruby-3.1.0-x86-mswin32-60.gem
Limiting Target Rubies
Some gems might choose not to support older versions of Ruby (like Nokogiri, which no longer supports 1.8).
If you wish to limit the versions of Ruby that your cross-compiled Windows binaries supports, you can use the environment variables
BASE_VERSION: the native version of Ruby that will be used as a base for cross-compilation
RUBY_CC_VERSION: a colon-separated list of target versions for cross-compilation
Note: If you wish to target 1.8.x, your base version must be 1.8.x -- versions 1.9+ cannot cross-build 1.8.
Use Ruby 1.9.3 to cross-compile a fat binary that includes 1.9 and 2.0 binaries:
vagrant@precise64:/vagrant$ BASE_VERSION=1.9.3 RUBY_CC_VERSION=1.9.3:2.0.0 package_all nokogiri
Use Ruby 2.0.0 to cross-compile a fat binary that includes 2.0 and 2.1 binaries:
vagrant@precise64:/vagrant$ BASE_VERSION=2.0.0 RUBY_CC_VERSION=2.0.0:2.1.3 package_all nokogiri
By default, with no environment variables, rake-compiler-dev-box will try to cross-compile for all available versions, using 1.8 as a base.
Log out of the virtual machine (
To shut down the virtual machine:
$ vagrant halt
To start it up again:
$ vagrant up
To completely remove the VM, clearing it from disk and destroying all contents:
$ vagrant destroy
To reinstantiate it for future compiling, it can be recreated with:
$ vagrant up
See the Vagrant docs for more info.