Installs Scala on Mac, Ubuntu and other Debian derivatives

installScala

#!/bin/bash

# Installs specified Scala version, and enables colorized REPL

SCALA_VERSION=2.11.4
if [ "$1" ]; then SCALA_VERSION=$1; fi

set -e

case "$OSTYPE" in
  darwin*)
      OS=Darwin
      FILE=scala-$SCALA_VERSION.tgz
      URL="http://downloads.typesafe.com/scala/$SCALA_VERSION/scala-$SCALA_VERSION.tgz"
      ;;
  linux*)
      OS=Linux
      FILE=scala-$SCALA_VERSION.deb
      URL="http://downloads.typesafe.com/scala/$SCALA_VERSION/scala-$SCALA_VERSION.deb"
      ;;
  *)
      echo "Cannot install to $OSTYPE"
      exit 2
      ;;
esac

if [ `curl --output /dev/null --silent --head --fail "$URL"` ]; then
  echo "Error: invalid url: $URL"
  exit 1
else
  if [ ! -f "$FILE" ]; then
    echo "Installing from $URL; temporarily saving to $FILE"
    wget -O $FILE "$URL"
  else
    echo "$FILE already exists so installing that file instead of redownloading"
  fi
fi

if [ $OS == Linux ]; then
  sudo dpkg -i $FILE
  echo "alias scala='scala -Dscala.color=true'" >> ~/.profile
elif [ $OS == Darwin ]; then
  tar -xzf $FILE
  sudo mv scala-$SCALA_VERSION /Applications/
  echo "export SCALA_HOME=/Applications/scala-$SCALA_VERSION" >> ~/.bash_profile
  echo "export PATH=$SCALA_HOME/bin:$PATH" >> ~/.bash_profile
  echo "alias scala='scala -Dscala.color=true'" >> ~/.bash_profile
  echo "To use $SCALA_VERSION, open a new console or type source ~/.bash_profile"
fi
rm $FILE