#!/usr/bin/env bash
# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

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

# Unlike $0, $BASH_SOURCE points to the absolute path of this file.
PROG_NAME="$(follow_links "$BASH_SOURCE")"

# Handle the case where dart-sdk/bin has been symlinked to.
BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"

SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"

DART="$BIN_DIR/dart"

unset EXTRA_OPTIONS
declare -a EXTRA_OPTIONS

if test -t 1; then
  # Stdout is a terminal.
  if test 8 -le `tput colors`; then
    # Stdout has at least 8 colors, so enable colors.
    EXTRA_OPTIONS+=('--enable-diagnostic-colors')
  fi
fi

unset EXTRA_VM_OPTIONS
declare -a EXTRA_VM_OPTIONS

case $0 in
  *_developer)
    EXTRA_VM_OPTIONS+=('--checked')
    ;;
esac

# We allow extra vm options to be passed in through an environment variable.
if [[ $DART_VM_OPTIONS ]]; then
  read -a OPTIONS <<< "$DART_VM_OPTIONS"
  EXTRA_VM_OPTIONS+=("${OPTIONS[@]}")
fi

DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"

DART2JS="$DART_ROOT/pkg/compiler/lib/src/dart2js.dart"

if [[ `uname` == 'Darwin' ]]; then
  OUT_DIR="$DART_ROOT/xcodebuild/"
else
  OUT_DIR="$DART_ROOT/out/"
fi

if [ -z "$DART_CONFIGURATION" ];
then
  DIRS=$( ls "$OUT_DIR" )
  # list of possible configurations in decreasing desirability
  CONFIGS=("ReleaseX64" "ReleaseIA32" "DebugX64" "DebugIA32"
    "ReleaseARM"    "ReleaseARM64"    "ReleaseARMV5TE"    "ReleaseMIPS"
    "DebugARM"      "DebugARM64"      "DebugARMV5TE"      "DebugMIPS")
  DART_CONFIGURATION="None"
  for CONFIG in ${CONFIGS[*]}
  do
    for DIR in $DIRS;
    do
      if [ "$CONFIG" = "$DIR" ];
      then
        # choose most desirable configuration that is available and break
        DART_CONFIGURATION="$DIR"
        break 2
      fi
    done
  done
  if [ "$DART_CONFIGURATION" = "None" ]
  then
    echo "No valid dart configuration found in $OUT_DIR"
    exit 1
  fi
fi

BUILD_DIR="$OUT_DIR$DART_CONFIGURATION"

PACKAGE_ROOT="$BUILD_DIR/packages/"

exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "--package-root=$PACKAGE_ROOT" "$DART2JS" "${EXTRA_OPTIONS[@]}" "$@"