#!/bin/bash

# bail on errors and unset variables
set -euo pipefail

SWIFT_VERSION=5.1.3
SWIFT_DIR=swift-$SWIFT_VERSION-RELEASE/swift-$SWIFT_VERSION-RELEASE-ubuntu18.04
SWIFT_FILENAME=$SWIFT_DIR.tar.gz

if [[ $(uname) = "Linux" ]]; then
  if which swiftc >/dev/null 2>/dev/null; then
    echo "*** swift is installed: $(swift --version)"
  else
    echo "*** installing swift"
    pushd $HOME
    wget https://swift.org/builds/swift-$SWIFT_VERSION-release/ubuntu1804/$SWIFT_FILENAME
    tar xzf $SWIFT_FILENAME
    echo "export PATH=\"\$HOME/$SWIFT_DIR/usr/bin:\$PATH\"" >> $HOME/.bashrc
    popd
  fi
fi

echo "*** done"