#!/bin/bash -eu
# Copyright 2023 Google LLC
#
# 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.
#
##########################################################################
CURRENT_VERSION=$($MVN org.apache.maven.plugins:maven-help-plugin:3.2.0:evaluate \
 -Dexpression=project.version -q -DforceStdout)
$MVN clean package -Dmaven.javadoc.skip=true -DskipTests=true -Dpmd.skip=true \
    -Dencoding=UTF-8 -Dmaven.antrun.skip=true -Dcheckstyle.skip=true \
    -DperformRelease=True org.apache.maven.plugins:maven-shade-plugin:3.2.4:shade

cp "./google-oauth-client/target/google-oauth-client-$CURRENT_VERSION.jar" $OUT/oauth.jar

ALL_JARS='oauth.jar'

# The classpath at build-time includes the project jars in $OUT as well as the
# Jazzer API.
BUILD_CLASSPATH=$(echo $ALL_JARS | xargs printf -- "$OUT/%s:"):$JAZZER_API_PATH

# All .jar and .class files lie in the same directory as the fuzzer at runtime.
RUNTIME_CLASSPATH=$(echo $ALL_JARS | xargs printf -- "\$this_dir/%s:"):\$this_dir

for fuzzer in $(find $SRC -name '*Fuzzer.java')
do
  fuzzer_basename=$(basename -s .java $fuzzer)
  javac -cp $BUILD_CLASSPATH $fuzzer
  cp $SRC/$fuzzer_basename.class $OUT/

  # Create an execution wrapper that executes Jazzer with the correct arguments.
  echo "#!/bin/bash
  # LLVMFuzzerTestOneInput for fuzzer detection.
  this_dir=\$(dirname "\$0")
  if [[ "\$@" =~ (^| )-runs=[0-9]+($| ) ]]
  then
    mem_settings='-Xmx1900m:-Xss900k'
  else
    mem_settings='-Xmx2048m:-Xss1024k'
  fi
  LD_LIBRARY_PATH="$JVM_LD_LIBRARY_PATH":\$this_dir \
    \$this_dir/jazzer_driver                        \
    --agent_path=\$this_dir/jazzer_agent_deploy.jar \
    --cp=$RUNTIME_CLASSPATH                         \
    --target_class=$fuzzer_basename                 \
    --jvm_args="\$mem_settings"                     \
    \$@" > $OUT/$fuzzer_basename

  chmod u+x $OUT/$fuzzer_basename
done
