make a native image of the pants zinc wrapper

make-pants-zinc-native-image.bash

#!/usr/bin/env bash

set -euxo pipefail

# NB: `mx` needs to be on $PATH!

if [[ ! -d 'openjdk1.8.0_202-jvmci-0.56' ]]; then
  if [[ "$(uname)" == 'Linux' ]]; then
     _jvmci_url_component='linux'
  else
    _jvmci_url_component='darwin'
  fi
  curl -L -v -O "https://github.com/graalvm/openjdk8-jvmci-builder/releases/download/jvmci-0.56/openjdk-8u202-jvmci-0.56-${_jvmci_url_component}-amd64.tar.gz"
  tar zxvf "openjdk-8u202-jvmci-0.56-${_jvmci_url_component}-amd64.tar.gz"
fi

export JAVA_HOME="$(pwd)/openjdk1.8.0_202-jvmci-0.56"

PANTS_ZINC_WRAPPER="$(pwd)/pants/dist/bin.jar"
if [[ ! -f "$PANTS_ZINC_WRAPPER" ]]; then
  git clone git@github.com:cosmicexplorer/pants
  pushd pants/
  git checkout graal-zinc-image
  ./pants binary src/scala/org/pantsbuild/zinc/compiler:bin
  [[ -f "$PANTS_ZINC_WRAPPER" ]]
  popd
fi

REFLECTIONS_JSON="$(pwd)/graalvm-demos/scala-days-2018/scalac-native/scalac-substitutions/reflection-config.json"
SUBSTITUTIONS_SNAPSHOT_JAR="$(pwd)/graalvm-demos/scala-days-2018/scalac-native/scalac-substitutions/target/scala-2.12/scalac-substitutions_2.12-0.1.0-SNAPSHOT.jar"
if [[ ! (-f "$REFLECTIONS_JSON" && -f "$SUBSTITUTIONS_SNAPSHOT_JAR" ) ]]; then
  git clone git@github.com:cosmicexplorer/graalvm-demos
  pushd graalvm-demos/
  git checkout build-zinc-native-image
  pushd scala-days-2018/scalac-native/scalac-substitutions/
  REFLECTIONS_JSON="$(pwd)/reflection-config.json"
  sbt package
  SUBSTITUTIONS_SNAPSHOT_JAR="$(pwd)/target/scala-2.12/scalac-substitutions_2.12-0.1.0-SNAPSHOT.jar"
  [[ -f "$REFLECTIONS_JSON" && -f "$SUBSTITUTIONS_SNAPSHOT_JAR" ]]
  popd
  popd
fi

function fetch_scala_compiler_jars {
  local -r version="$1"
  coursier fetch org.scala-lang:scala-{compiler,library,reflect}:"$version" \
    | tr '\n' ':' \
    | sed -re 's#:$##g'
}

# This is a hack, on my arch linux laptop it is necessary, this is pants's fault.
if hash scala && scala -version 2>&1 | grep --color '2.12.8'; then
  SCALA_COMPILER_JARS="$(printf "%s\n" /usr/share/scala/lib/scala-{compiler,library,reflect}.jar \
  | tr '\n' ':' \
  | sed -re 's#:$##g')"
else
  SCALA_COMPILER_JARS="$(fetch_scala_compiler_jars 2.12.8)"
fi

SVM_DIR="$(pwd)/substratevm"

pushd "$SVM_DIR"
mx build
popd

pushd pants/
mx \
  -p "$SVM_DIR" \
  native-image \
  -cp "${PANTS_ZINC_WRAPPER}:${SCALA_COMPILER_JARS}:${SUBSTITUTIONS_SNAPSHOT_JAR}" \
  -H:SubstitutionResources=substitutions.json,substitutions-2.12.json \
  -H:ReflectionConfigurationFiles="$REFLECTIONS_JSON" \
  -H:ConfigurationFileDirectories="$(pwd)/native-image-configure/" \
  org.pantsbuild.zinc.compiler.Main \
  --verbose --no-server \
  --enable-all-security-services --allow-incomplete-classpath \
  -O0 -J-Xmx8g \
  --report-unsupported-elements-at-runtime \
  -H:+ReportExceptionStackTraces \
  --delay-class-initialization-to-runtime=org.pantsbuild.zinc.compiler.Main \
  --delay-class-initialization-to-runtime='org.pantsbuild.zinc.compiler.Main$' \
  --delay-class-initialization-to-runtime=scala.tools.nsc.interpreter.IMain \
  --delay-class-initialization-to-runtime='scala.tools.nsc.interpreter.IMain$' \
  --delay-class-initialization-to-runtime=scala.tools.nsc.interpreter.NamedParam \
  --delay-class-initialization-to-runtime=sbt.internal.util.StringTypeTag \
  --delay-class-initialization-to-runtime=org.pantsbuild.zinc.compiler.InputUtils \
  --delay-class-initialization-to-runtime='scala.tools.nsc.interpreter.IBindings' \
  --delay-class-initialization-to-runtime='scala.reflect.runtime.package$' \
  --delay-class-initialization-to-runtime='scala.tools.nsc.interpreter.StdReplTags$' \
  -H:NumberOfThreads=1

./org.pantsbuild.zinc.compiler.main -help
popd