Scala in Colab

enable_scala_kernel.sh

# Based on https://gist.github.com/shadaj/aaac98b690cfeb0cbd891bfe3ce5725d#file-scala-in-colab-template-ipynb

SCALA_VERSION=2.12.8 
ALMOND_VERSION=0.3.0+16-548dc10f-SNAPSHOT

[ -f /usr/local/share/jupyter/kernels/scala/kernel.json ] && exit

curl -Lo coursier https://git.io/coursier-cli
chmod +x coursier
./coursier bootstrap \
    -r jitpack -r sonatype:snapshots \
    -i user -I user:sh.almond:scala-kernel-api_$SCALA_VERSION:$ALMOND_VERSION \
    sh.almond:scala-kernel_$SCALA_VERSION:$ALMOND_VERSION \
    --sources --default=true \
    -o almond-snapshot --embed-files=false
rm coursier
./almond-snapshot --install --global --force
rm almond-snapshot

echo "{
  \"language\" : \"scala\",
  \"display_name\" : \"Scala\",
  \"argv\" : [
    \"bash\",
    \"-c\",
    \"env LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libpython3.6m.so:\$LD_PRELOAD java -jar /usr/local/share/jupyter/kernels/scala/launcher.jar --connection-file {connection_file}\"
  ]
}" > /usr/local/share/jupyter/kernels/scala/kernel.json

echo "Now reload the page to load the notebook in the installed Scala kernel!"

scala_template.ipynb