#!/usr/bin/env bash
layers_dir=$1

# 4. MAKE MAVEN M2 CACHE LAYER
m2_layer_dir="${layers_dir}/maven_m2"
if [[ ! -d "${m2_layer_dir}" ]]; then
  mkdir -p "${m2_layer_dir}"
  cat > "${m2_layer_dir}.toml" << EOF
[types]
cache = true
EOF
fi
ln -s "${m2_layer_dir}" "$HOME/.m2"
# 5. RUN BUILD
MAVEN_OPTS="${MAVEN_OPTS:-"-XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap"}"

if [[ -x mvnw ]]; then
  echo "---> Running Maven Wrapper"
  ./mvnw clean install -B -DskipTests
else
  maven_url="https://apache.org/dist/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.tar.gz"
  maven_version="3.5.4"
  maven_layer_dir="${layers_dir}/maven"
  if [[ -f "${layers_dir}/maven.toml" ]]; then
    cached_maven_url=$(cat "${maven_layer_dir}.toml" | yj -t | jq -r .metadata.url 2>/dev/null || echo 'Maven TOML parsing failed')
  fi
  if [[ "${maven_url}" != "${cached_maven_url}" ]] ; then
    echo "---> Installing Maven"
    rm -rf "${maven_layer_dir}"
    mkdir -p "${maven_layer_dir}"
    wget -q -O - "${maven_url}" | tar pxz -C "${maven_layer_dir}" --strip-components=1
    cat > "${maven_layer_dir}.toml" << EOF
[types]
launch = true
build = true
cache = true
[metadata]
version = "${maven_version}"
url = "${maven_url}"
EOF
  fi
  export PATH="${layers_dir}/maven/bin:${PATH}"
  echo "---> Running Maven Wrapper"
  mvn clean install -B -DskipTests
fi