#!/bin/bash -eu
# Copyright 2022 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.
#
################################################################################


MAVEN_ARGS="-Djavac.src.version=15 -Djavac.target.version=15 -DskipTests -Drat.ignoreErrors=true"

ALL_JARS=""

pushd "${SRC}/commons-logging"
	$MVN package $MAVEN_ARGS
	CURRENT_VERSION=$($MVN org.apache.maven.plugins:maven-help-plugin:3.2.0:evaluate \
		-Dexpression=project.version -q -DforceStdout)
	cp -v target/commons-logging-${CURRENT_VERSION}.jar "$OUT/commons-logging.jar"
	ALL_JARS="${ALL_JARS} commons-logging.jar"
popd

LOG4J_VERSION=$(echo $(curl -s 'https://api.github.com/repos/apache/logging-log4j2/tags?per_page=1' | jq -r .[].name) | sed 's/^[^0-9]*//')
curl "https://dlcdn.apache.org/logging/log4j/$LOG4J_VERSION/apache-log4j-$LOG4J_VERSION-bin.tar.gz" -o apache-log4j-bin.tar.gz
tar xf apache-log4j-bin.tar.gz
unlink apache-log4j-bin.tar.gz
mv apache-log4j-$LOG4J_VERSION-bin $SRC

for jarFile in ${SRC}/apache-log4j-$LOG4J_VERSION-bin/log4j-api-$LOG4J_VERSION.jar ${SRC}/apache-log4j-$LOG4J_VERSION-bin/log4j-core-$LOG4J_VERSION.jar ${SRC}/apache-log4j-$LOG4J_VERSION-bin/log4j-1.2-api-$LOG4J_VERSION.jar ; do
	cp -v ${jarFile} "$OUT/$(basename ${jarFile})"
	ALL_JARS="${ALL_JARS} $(basename ${jarFile})"
done

# 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

# compile all java files and copy them to $OUT
javac -cp $SRC:$BUILD_CLASSPATH -g $SRC/*.java $SRC/Package/*.java
mkdir -p $OUT/Package
cp -vr $SRC/Package/*.class $OUT/Package
cp -v $SRC/*.class $OUT/
cp -v $SRC/*.xml $OUT/

for fuzzer in $(find $SRC -name '*Fuzzer.java'); do
  fuzzer_basename=$(basename -s .java $fuzzer)

  # 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
