#!/usr/bin/env bash
#
# by jsuereth and paulp

# always good to fail fast
set -e

gitignore="$(dirname $0)/.gitignore"
bootdir="$(dirname $0)/.boot"
sbtjar="${bootdir}/sbt-launch.jar"
launchversionfile="${bootdir}/.launchversion"
sbtversion=0.11.2
#  sbturl="http://typesafe.artifactoryonline.com/typesafe/ivy-snapshots/org.scala-tools.sbt/sbt-launch/$sbtversion/sbt-launch.jar"
sbturl="http://typesafe.artifactoryonline.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt-launch/$sbtversion/sbt-launch.jar"

# Check the current stored launch version.
if [[ -f "$launchversionfile" ]]; then
  storedversion="$(cat $launchversionfile)"
else
  storedversion=""
fi

if [[ ! -d "$bootdir" ]]; then
  echo "Creating .boot directory for xsbt"
  pushd $(dirname $0)
  mkdir $bootdir
  popd
fi

if [[ ! -f "$gitignore" ]]; then
  echo "Creating .gitignore"
  echo ".gitignore" > "$gitignore"
fi

for ign in .boot
do
  if ! grep -Fq "$ign" "$gitignore"; then
    echo "Adding $ign to $gitignore."
    echo "$ign" >> "$gitignore"
  fi
done

# TODO - Check version of SBT launch jar in some kind of tag file so we can pull new versions when needed.
if [[ ! -f "$sbtjar" ]] || [[ "$storedversion" != "$sbtversion" ]]; then
  if [[ -f "$sbtjar" ]]; then
    echo "SBT launch is out-of-date.  Removing old version."
    rm $sbtjar
  fi
  echo "Downloading sbt version $sbtversion to $sbtjar ..."
  echo ""
  # TODO - Do this after downloading the new JAR file...
  echo "$sbtversion" >$launchversionfile
  if [[ $(which curl) ]]; then
    curl --silent "$sbturl" > "$sbtjar"
  elif [[ $(which wget) ]]; then
    pushd $bootdir
    wget $sbturl 
    popd
  else
    cat <<EOM
No means of downloading sbt-launch.jar found.   Either:
 * install curl
 * install wget
 * manually download: $sbturl
        and place at: $sbtjar
EOM
  fi
fi

java $JAVA_OPTS \
  -XX:+CMSClassUnloadingEnabled \
  -XX:+HeapDumpOnOutOfMemoryError \
  -XX:MaxPermSize=512m \
  -Xmx3g -Xms3g -Xss2M \
  -XX:ReservedCodeCacheSize=200m \
  -XX:+UseParallelGC \
  -jar "$sbtjar" "$@"