#!/usr/bin/env bash

# This script is used for running compiler standalone(outside of sbt)
# it's based on miniboxing script and paulp's launcher script

# Try to autodetect real location of the script
DOTTY_ROOT="$(readlink "$0")"              #  relative, symbolic links resolved
if [[ "$DOTTY_ROOT" == "" ]]; then
  DOTTY_ROOT="$0"
fi
DOTTY_ROOT="$(dirname "$DOTTY_ROOT")"
DOTTY_ROOT="$( cd "$DOTTY_ROOT" >& /dev/null && pwd )/.."  # absolute

source "$DOTTY_ROOT/bin/common"

# dotc.build test places bootstrapped jar here
DOTTY_JAR="$DOTTY_ROOT/dotty.jar"

CompilerMain=dotty.tools.dotc.Main
FromTasty=dotty.tools.dotc.FromTasty
ReplMain=dotty.tools.dotc.repl.Main

if [ ! -f "$SCALA_LIBRARY_JAR" -o ! -f "$SCALA_REFLECT_JAR"  -o ! -f "$SCALA_ASM_JAR" -o ! -f "$SBT_INTERFACE_JAR" ]
then
  echo To use this script please set
  echo SCALA_LIBRARY_JAR to point to scala-library-$SCALA_VERSION.jar "(currently $SCALA_LIBRARY_JAR)"
  echo SCALA_REFLECT_JAR to point to scala-reflect-$SCALA_VERSION.jar "(currently $SCALA_REFLECT_JAR)"
  echo SCALA_ASM_JAR to point to scala-asm-$SCALA_ASM_VERSION.jar "(currently $SCALA_ASM_JAR)"
  echo SBT_INTERFACE_JAR to point to interface-$SBT_VERSION.jar "(currently $SBT_INTERFACE_JAR)"
fi

ifdebug () {
  [[ -n "$debug" ]] && eval "$@"
}
echoErr () {
  echo >&2 "$@"
}
dlog () {
  [[ -n "$debug" ]] && echoErr "$@"
}

die() {
  echo "Aborting: $@"
  exit 1
}
echoArgs () {
  echoErr ""
  for arg; do
echoErr "$arg"
  done
echoErr ""
}
execCommand () {
  ifdebug echoArgs "$@"
  ignore="$(cat "$HOME/.scala_ignore_crashes" 2>/dev/null)"
  if [[ "$ignore" == "true" ]]; then
    "$@" 2>&1 | scala-crash-filter
  else
    $@
  fi
}

# restore stty settings (echo in particular)
restoreSttySettings () {
  dlog "" && dlog "[restore stty] $saved_stty"
  stty "$saved_stty" && saved_stty=""
}

onExit () {
  [[ -n "$saved_stty" ]] && restoreSttySettings
  exit $scala_exit_status
}

# Get debug set early
for arg in "$@"; do
  [[ $arg == "-debug" ]] && debug=true
done

# to reenable echo if we are interrupted before completing.
trap onExit INT

# save terminal settings
saved_stty="$(stty -g 2>/dev/null)"

# clear on error so we don't later try to restore them
[[ $? ]] || saved_stty=""
dlog "[save stty] $saved_stty"

if uname | grep -q ^CYGWIN; then
cygwin="$(uname)"
fi

addJava () {
  dlog "[addJava] arg = '$1'"
  java_args+=("$1")
}
addScala () {
  dlog "[addScala] arg = '$1'"
  scala_args+=("$1")
}
addResidual () {
  dlog "[residual] arg = '$1'"
  residual_args+=("$1")
}

onExit() {
  [[ -n "$saved_stty" ]] && restoreSttySettings
  exit $scala_exit_status
}

# to reenable echo if we are interrupted before completing.
trap onExit INT

# If using the boot classpath, also pass an empty classpath
# to java to suppress "." from materializing.
classpathArgs () {
  if [[ "true" == "$bootstrapped" ]]; then
    check_jar "dotty-bootstrapped" "$DOTTY_JAR" "target" 'build_jar "test:runMain dotc.build" target' &> /dev/null
    toolchain="$DOTTY_JAR:$DOTTY_LIB_JAR:$SCALA_LIBRARY_JAR:$SCALA_REFLECT_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
  else
    toolchain="$SCALA_LIBRARY_JAR:$DOTTY_LIB_JAR:$SCALA_REFLECT_JAR:$SCALA_ASM_JAR:$SBT_INTERFACE_JAR"
  fi
  bcpJars="$INTERFACES_JAR:$MAIN_JAR:$DOTTY_LIB_JAR"
  cpJars="$INTERFACES_JAR:$MAIN_JAR:$DOTTY_LIB_JAR:$TEST_JAR"

  if [[ -n "$cygwin" ]]; then
    if [[ "$OS" = "Windows_NT" ]] && cygpath -m .>/dev/null 2>/dev/null ; then
      format=mixed
    else
      format=windows
    fi

    if [[ -n "$bootcp" ]]; then
      boot_classpath="$(cygpath --path --$format "$toolchain:$bcpJars")"
      classpath="$(cygpath --path --$format "$cpJars")"
      cpArgs="-Xbootclasspath/a:$boot_classpath -classpath $classpath"
    else
      classpath="$(cygpath --path --$format "$toolchain:$cpJars")"
      cpArgs="-classpath $classpath"
    fi
  else
    if [[ -n "$bootcp" ]]; then
      cpArgs="-Xbootclasspath/a:$toolchain:$bcpJars -classpath $cpJars"
    else
      cpArgs="-classpath $toolchain:$cpJars"
    fi
  fi
  echo ${cpArgs}
}

# e.g. path -java-home /path/to/java_home
require_arg () {
  local type="$1"
  local opt="$2"
  local arg="$3"

  if [[ -z "$arg" ]] || [[ "${arg:0:1}" == "-" ]]; then
    die "$opt requires <$type> argument"
  fi
}


main_class="$CompilerMain"

while [[ $# -gt 0 ]]; do
case "$1" in
           --) shift; for arg; do addResidual "$arg"; done; set -- ;;
     -h|-help) help=true && shift ;;
     -bootstrapped) bootstrapped=true && shift ;;
  -v|-verbose) verbose=true && shift ;;
    -debug) debug=true && shift ;;
    -q|-quiet) quiet=true && shift ;;

    # Optimize for short-running applications, see https://github.com/lampepfl/dotty/issues/222
    -Oshort) addJava "-XX:+TieredCompilation -XX:TieredStopAtLevel=1" && shift ;;
        -repl) main_class="$ReplMain" && shift ;;
       -tasty) main_class="$FromTasty" && shift ;;
     -compile) main_class="$CompilerMain" && shift ;;
         -run) main_class="$ReplMain" && shift ;;
         -fsc) main_class="$FscMain" && shift ;;
      -bootcp) bootcp=true && shift ;;
   -nobootcp) unset bootcp && shift ;;
      -colors) colors=true && shift ;;
   -no-colors) unset colors && shift ;;
      -jrebel) jrebel=true && shift ;;
   -no-jrebel) unset jrebel && shift ;;

      -toolcp) require_arg classpath "$1" "$2" && toolcp="$2" && shift 2 ;;
   -java-home) require_arg path "$1" "$2" && java_cmd="$2/bin/java" && shift 2 ;;

          # break out -D and -J options and add them to JAVA_OPTS as well
          # so they reach the JVM in time to do some good. The -D options
          # will be available as system properties.
          -D*) addJava "$1" && addScala "$1" && shift ;;
          -J*) addJava "${1:2}" && addScala "$1" && shift ;;
            *) addResidual "$1" && shift ;;
  esac
done


[[ -z $java_cmd ]] && prefix=${java_home:+$java_home/bin/} && java_cmd="${prefix}java"

# note that variables which may intentionally be empty must not
# be quoted: otherwise an empty string will appear as a command line
# argument, and java will think that is the program to run.
execCommand \
  "$java_cmd" \
  ${JAVA_OPTS:-$default_java_opts} \
  "${java_args[@]}" \
  "$(classpathArgs)" \
  -Dscala.usejavacp=true \
  "${main_class}" \
  "${scala_args[@]}" \
  "${residual_args[@]}"

# record the exit status lest it be overwritten:
# then reenable echo and propagate the code.
scala_exit_status=$?
onExit


#echo java -cp $MAIN_JAR: -Dscala.usejavacp=true dotty.tools.dotc.Main $@