If you want to contribute then you might want to install Crystal from sources.
Install the latest Crystal release. To compile Crystal, you need Crystal :).
Make sure a supported LLVM version is present in the path. Currently, Crystal supports LLVM 3.8, 3.9 and 4.0. When possible, use the latest one. If you are using Mac and the Homebrew formula, this will be automatically configured for you if you install Crystal adding
Clone the repository:
git clone https://github.com/crystal-lang/crystal.git
maketo build your own version of the compiler
make specto ensure all specs pass, and you've installed everything correctly.
bin/crystalto run your crystal files
If you would like more information about the new
bin/crystal, check out the using the compiler documentation.
Note: The actual binary is built in to
.build/crystal, but the
bin/crystal wrapper script is what you should use to run crystal.