#!/bin/bash -eu
# Copyright 2021 Google Inc.
#
# 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.
#
################################################################################

# Move seed corpus and dictionary.
mv $SRC/{*.zip,*.dict} $OUT

PROJECTS="compress imaging geometry"
GEOMETRY_MODULE="commons-geometry-io-euclidean"

for project in $PROJECTS; do
  cd $SRC/commons-$project
  MAVEN_ARGS="-Dmaven.test.skip=true -Djavac.src.version=15 -Djavac.target.version=15 -Djdk.version=15"
  CURRENT_VERSION=$($MVN org.apache.maven.plugins:maven-help-plugin:3.2.0:evaluate \
  -Dexpression=project.version -q -DforceStdout)

  if [ $project = 'geometry' ]; then
    # commons-geometry is a multi-module project and requires special handling in order
    # to build and extract the proper module (commons-geometry-io-euclidean)
    $MVN package org.apache.maven.plugins:maven-shade-plugin:3.2.4:shade -am -pl $GEOMETRY_MODULE $MAVEN_ARGS
    cp "$GEOMETRY_MODULE/target/$GEOMETRY_MODULE-$CURRENT_VERSION.jar" $OUT/commons-$project.jar
  else
    $MVN package org.apache.maven.plugins:maven-shade-plugin:3.2.4:shade $MAVEN_ARGS
    cp "target/commons-$project-$CURRENT_VERSION.jar" $OUT/commons-$project.jar
  fi

  ALL_JARS="commons-$project.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 $SRC -iname "$project"'*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/sh
# LLVMFuzzerTestOneInput for fuzzer detection.
this_dir=\$(dirname \"\$0\")
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=\"-Xmx2048m:-Djava.awt.headless=true\" \
\$@" > $OUT/$fuzzer_basename
    chmod +x $OUT/$fuzzer_basename
  done
done