#!/bin/bash
#
# Copyright 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# make us exit on a failure
set -e

export ASM_JAR="${ANDROID_BUILD_TOP}/prebuilts/misc/common/asm/asm-6.0.jar"

export ORIGINAL_JAVAC="$JAVAC"

function javac_wrapper {
  set -e

  # Add annotation src files to our compiler inputs.
  local asrcs=util-src/annotations/*.java

  # Compile.
  $ORIGINAL_JAVAC "$@" $asrcs

  # Move original classes to intermediate location.
  mv classes intermediate-classes
  mkdir classes

  # Transform intermediate classes.
  local transformer_args="-cp ${ASM_JAR}:$PWD/transformer.jar transformer.ConstantTransformer"
  for class in intermediate-classes/*.class ; do
    local transformed_class=classes/$(basename ${class})
    ${JAVA:-java} ${transformer_args} ${class} ${transformed_class}
  done
}

export -f javac_wrapper
export JAVAC=javac_wrapper

######################################################################

# Build the transformer to apply to compiled classes.
mkdir classes
${ORIGINAL_JAVAC:-javac} ${JAVAC_ARGS} -cp "${ASM_JAR}" -d classes $(find util-src -name '*.java')
jar -cf transformer.jar -C classes transformer/ -C classes annotations/
rm -rf classes

# Use API level 28 for DEX file support constant method handles.
./default-build "$@" --api-level 28