kotlinw

#!/usr/bin/env bash
set -e

ROOT_DIR="$(dirname $0)"

JDK_VERSION="$(grep -s 'java-gradle' $ROOT_DIR/gradle/libs.versions.toml | cut -d'"' -f2)"
if [ -z "$JDK_VERSION" ]; then
  JDK_VERSION="21"
fi

KOTLIN_VERSION="1.9.0"
if [ -f "$ROOT_DIR/gradle/libs.versions.toml" ]; then
  KOTLIN_VERSION="$(grep -m 1 '^kotlin \?=' $ROOT_DIR/gradle/libs.versions.toml | cut -d'"' -f2)"
fi

INSTALLATION_DIR="${HOME}/.kotlinw/${KOTLIN_VERSION}"
BINARY_DIR="${INSTALLATION_DIR}/kotlinc/bin"

if [[ "$OSTYPE" == "linux-gnu"* ]]; then
  if [ -d "/usr/lib/jvm/zulu-$JDK_VERSION-amd64" ]; then
    JAVA_HOME="/usr/lib/jvm/zulu-$JDK_VERSION-amd64/"
  elif [ -d "/usr/lib/jvm/zulu$JDK_VERSION-ca-amd64" ]; then
    JAVA_HOME="/usr/lib/jvm/zulu$JDK_VERSION-ca-amd64/"
  else
    java --version
  fi
elif [[ "$OSTYPE" == "darwin"* ]]; then
  JAVA_HOME="/Library/Java/JavaVirtualMachines/zulu-$JDK_VERSION.jdk/Contents/Home"
  if [ ! -d "/Library/Java/JavaVirtualMachines/zulu-${JDK_VERSION}.jdk/Contents/Home" ]; then
    echo "Installing JDK ${JDK_VERSION} (you may be prompted for your password)..."
    brew tap mdogan/zulu
    brew install --cask "zulu-jdk${JDK_VERSION}"
  fi
else
  echo "Only macOS and Linux are supported."
  exit 1
fi

if [ ! -f "${BINARY_DIR}/kotlin" ]; then
  echo "Downloading Kotlin ${KOTLIN_VERSION}"
  mkdir -p ${INSTALLATION_DIR}
  temp_file=$(mktemp /tmp/kotlin.zip.XXXXXX)
  curl -sLo "${temp_file}" "https://github.com/JetBrains/kotlin/releases/download/v${KOTLIN_VERSION}/kotlin-compiler-${KOTLIN_VERSION}.zip"
  unzip -q "${temp_file}" -d "${INSTALLATION_DIR}"
  rm -f "${temp_file}"
fi

# this works around an issue where the Kotlin compiler used by ktlint accesses code that JDK 12+ don't allow access to
export JAVA_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED"

"${BINARY_DIR}/kotlin" "$@"