#!/bin/bash -eu
# Copyright 2018 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.
#
################################################################################
PREFIX=$WORK/prefix
mkdir -p $PREFIX

export PKG_CONFIG="`which pkg-config` --static"
export PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig
export PATH=$PREFIX/bin:$PATH

BUILD=$WORK/build

rm -rf $WORK/*
rm -rf $BUILD
mkdir -p $BUILD

# Build glib
pushd $SRC/glib-2.64.2
meson \
    --prefix=$PREFIX \
    --libdir=lib \
    --default-library=static \
    -Db_lundef=false \
    -Doss_fuzz=enabled \
    -Dlibmount=disabled \
    -Dinternal_pcre=true \
    _builddir
ninja -C _builddir
ninja -C _builddir install
popd

# Build gdk-pixbuf
pushd $SRC/gdk-pixbuf
meson \
    --prefix=$PREFIX \
    --libdir=lib \
    --default-library=static \
    -Dintrospection=disabled \
    -Dbuiltin_loaders='all' \
    _builddir
ninja -C _builddir
ninja -C _builddir install
popd

mv $SRC/{*.zip,*.dict} $OUT

if [ ! -f "${OUT}/gdk-pixbuf_seed_corpus.zip" ]; then
  echo "missing seed corpus"
  exit 1
fi

if [ ! -f "${OUT}/gdk-pixbuf.dict" ]; then
  echo "missing dictionary"
  exit 1
fi

PREDEPS_LDFLAGS="-Wl,-Bdynamic -ldl -lm -lc -pthread -lrt -lpthread"
DEPS="gmodule-2.0 glib-2.0 gio-2.0 gobject-2.0 gdk-pixbuf-2.0"
BUILD_CFLAGS="$CFLAGS `pkg-config --static --cflags $DEPS`"
BUILD_LDFLAGS="-Wl,-static `pkg-config --static --libs $DEPS`"

fuzzers=$(find $SRC/fuzz/ -name "*_fuzzer.c")
for f in $fuzzers; do
  fuzzer_name=$(basename $f .c)
  $CC $CFLAGS $BUILD_CFLAGS -c $f -o $WORK/${fuzzer_name}.o
  $CXX $CXXFLAGS \
    $WORK/${fuzzer_name}.o -o $OUT/${fuzzer_name} \
    $PREDEPS_LDFLAGS \
    $BUILD_LDFLAGS \
    $LIB_FUZZING_ENGINE \
    -Wl,-Bdynamic
  ln -sf $OUT/gdk-pixbuf_seed_corpus.zip $OUT/${fuzzer_name}_seed_corpus.zip
  ln -sf $OUT/gdk-pixbuf.dict $OUT/${fuzzer_name}.dict
done