scala-cli.sh

#!/usr/bin/env bash

# This is the launcher script of Scala CLI (https://github.com/VirtusLab/scala-cli).
# This script downloads and runs the Scala CLI version set by SCALA_CLI_VERSION below.
#
# Download the latest version of this script at https://github.com/VirtusLab/scala-cli/raw/main/scala-cli.sh

set -eu

SCALA_CLI_VERSION="nightly"

GH_ORG="alexarchambault"
GH_NAME="scala-cli"

if [ "$SCALA_CLI_VERSION" == "nightly" ]; then
  TAG="nightly"
else
  TAG="v$SCALA_CLI_VERSION"
fi

if [ "$(expr substr $(uname -s) 1 5 2>/dev/null)" == "Linux" ]; then
  SCALA_CLI_URL="https://github.com/$GH_ORG/$GH_NAME/releases/download/$TAG/scala-cli-x86_64-pc-linux.gz"
  CACHE_BASE="$HOME/.cache/coursier/v1"
elif [ "$(uname)" == "Darwin" ]; then
  SCALA_CLI_URL="https://github.com/$GH_ORG/$GH_NAME/releases/download/$TAG/scala-cli-x86_64-apple-darwin.gz"
  CACHE_BASE="$HOME/Library/Caches/Coursier/v1"
else
   echo "This standalone scala-cli launcher is supported only in Linux and macOS. If you are using Windows, please use the dedicated launcher scala-cli.bat"
   exit 1
fi

if [ "$SCALA_CLI_VERSION" == "nightly" ]; then
  SCALA_CLI_BIN_PATH="$(cs get --changing "$SCALA_CLI_URL" --archive)"
  if [ ! -x "$SCALA_CLI_BIN_PATH" ]; then
    chmod +x "$SCALA_CLI_BIN_PATH"
  fi
else
  CACHE_DEST="$CACHE_BASE/$(echo "$SCALA_CLI_URL" | sed 's@://@/@')"
  SCALA_CLI_BIN_PATH=${CACHE_DEST%.gz}

  if [ ! -f "$CACHE_DEST" ]; then
    mkdir -p "$(dirname "$CACHE_DEST")"
    TMP_DEST="$CACHE_DEST.tmp-setup"
    echo "Downloading $SCALA_CLI_URL"
    curl -fLo "$TMP_DEST" "$SCALA_CLI_URL"
    mv "$TMP_DEST" "$CACHE_DEST"
  fi

  if [ ! -f "$SCALA_CLI_BIN_PATH" ]; then
    gunzip -k "$CACHE_DEST"
  fi

  if [ ! -x "$SCALA_CLI_BIN_PATH" ]; then
    chmod +x "$SCALA_CLI_BIN_PATH"
  fi
fi

exec "$SCALA_CLI_BIN_PATH" "$@"