Crystal in Docker on Linux

• Docker Crystal
• Install Docker
• Create a file called crystal with the following content:

docker run --rm -it -w/opt -v$(pwd):/opt crystallang/crystal crystal $*

• Make it executable by running chmod +x crystal
• Run ./crystal examples/intro/hello_world.cr

Alternative:

Start docker container:

docker run --rm -it -w/opt -v$(pwd):/opt --name crystal -d crystallang/crystal tail -f /opt/Dockerfile

Execute in the running container:

docker exec crystal crystal examples/intro/hello_world.cr

Later you can stop the container:

docker -t0 stop crystal