Install Crystal on Alpine Linux

Add the APK repository, along with the signing key:

echo http://public.portalier.com/alpine/testing >> /etc/apk/repositories
wget http://public.portalier.com/alpine/julien%40portalier.com-56dab02e.rsa.pub -O /etc/apk/keys/julien@portalier.com-56dab02e.rsa.pub

Once the repository is configured, you may install Crystal and Shards:

apk update
apk add crystal shards

You may later upgrade to a newer release:

apk update
apk add --upgrade crystal shards

Notes

• Packages are build on Alpine Linux v3.6 using the provided LLVM 4.0 packages.
• Packages are available for the x86 and x86_64 architectures.
• No packages for the armhf or aarch64 architectures (yet).