#!/bin/bash
# Copyright 2016 The Vanadium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

set -e

function follow_links() {
  cd -P "${1%/*}"
  file="$PWD/${1##*/}"
  while [ -h "$file" ]; do
    # On Mac OS, readlink -f doesn't work.
    cd -P "${file%/*}"
    file="$(readlink "$file")"
    cd -P "${file%/*}"
    file="$PWD/${file##*/}"
  done
  echo "$PWD/${file##*/}"
}

PROG_NAME="$(follow_links "$BASH_SOURCE")"
BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
export MDTEST_TOOL="$(cd "${BIN_DIR}/.." ; pwd -P)"

SNAPSHOT_PATH="$MDTEST_TOOL/bin/cache/mdtest.snapshot"
STAMP_PATH="$MDTEST_TOOL/bin/cache/mdtest.stamp"
SCRIPT_PATH="$MDTEST_TOOL/bin/mdtest.dart"
DART="$(which dart)"
PUB="$(which pub)"

if [ "$DART" = "dart not found" ]; then
  echo "dart is not detected.  Please install dart sdk from www.dartlang.org"
  exit 0
fi

if [ "$PUB" = "pub not found" ]; then
  echo "pub is not detected.  Please install dart sdk from www.dartlang.org"
  exit 0
fi

REVISION=`(cd "$MDTEST_TOOL"; git rev-parse HEAD)`
if [ ! -f "$SNAPSHOT_PATH" ] || [ ! -f "$STAMP_PATH" ] || [ `cat "$STAMP_PATH"` != "$REVISION" ] || [ "$MDTEST_TOOL/pubspec.yaml" -nt "$MDTEST_TOOL/pubspec.lock" ]; then
  echo Building mdtest ...
  (cd "$MDTEST_TOOL"; "$PUB" get --verbosity=warning)
  "$DART" --snapshot="$SNAPSHOT_PATH" --packages="$MDTEST_TOOL/.packages" "$SCRIPT_PATH"
  echo $REVISION > "$STAMP_PATH"
  echo Build Success
fi

if [ $MDTEST_DEV ]; then
  "$DART" --packages="$MDTEST_TOOL/.packages" -c "$SCRIPT_PATH" "$@"
else
  set +e
  "$DART" "$SNAPSHOT_PATH" "$@"

  EXIT_CODE=$?
  if [ $EXIT_CODE != 253 ]; then
    exit $EXIT_CODE
  fi

  set -e
  "$DART" --snapshot="$SNAPSHOT_PATH" --package="$MDTEST_TOOL/.package" "$SCRIPT_PATH"
  "$DART" "$SNAPSHOT_PATH" "$@"
fi