#!/bin/bash

set -eux -o pipefail
shopt -s failglob extglob

ZUUL_JOB_NAME=$(jq < ~/zuul-env.json -r '.job')
ZUUL_TENANT=$(jq < ~/zuul-env.json -r '.tenant')
ZUUL_PROJECT_SRC_DIR=$HOME/$(jq < ~/zuul-env.json -r '.project.src_dir')
ZUUL_PROJECT_SHORT_NAME=$(jq < ~/zuul-env.json -r '.project.short_name')
ZUUL_GERRIT_HOSTNAME=$(jq < ~/zuul-env.json -r '.project.canonical_hostname')

CI_PARALLEL_JOBS=$(grep -c '^processor' /proc/cpuinfo)
CMAKE_OPTIONS=""
CFLAGS=""
CXXFLAGS=""
LDFLAGS=""

if [[ $ZUUL_JOB_NAME =~ .*-clang.* ]]; then
    export CC=clang
    export CXX=clang++
    export LD=clang
    export CXXFLAGS="-stdlib=libc++"
fi

if [[ $ZUUL_JOB_NAME =~ .*-ubsan ]]; then
    export CFLAGS="-fsanitize=undefined ${CFLAGS}"
    export CXXFLAGS="-fsanitize=undefined ${CXXFLAGS}"
    export LDFLAGS="-fsanitize=undefined ${LDFLAGS}"
fi

if [[ $ZUUL_JOB_NAME =~ .*-asan ]]; then
    export CFLAGS="-fsanitize=address ${CFLAGS}"
    export CXXFLAGS="-fsanitize=address ${CXXFLAGS}"
    export LDFLAGS="-fsanitize=address ${LDFLAGS}"
fi

if [[ $ZUUL_JOB_NAME =~ .*-tsan ]]; then
    export CFLAGS="-fsanitize=thread ${CFLAGS}"
    export CXXFLAGS="-fsanitize=thread ${CXXFLAGS}"
    export LDFLAGS="-fsanitize=thread ${LDFLAGS}"
fi

if [[ $ZUUL_JOB_NAME =~ -gcc$ ]]; then
    # Python and ASAN (and, presumably, all other sanitizers) are tricky to use from a Python DSO,
    # I was, e.g., getting unrelated failures from libyang's thread-local global access (ly_errno)
    # even when correctly injecting the ASAN runtime via LD_PRELOAD. Let's just give up and only
    # enable this when not using sanitizers.
    # I'm still adding some code to CMakeLists.txt which makes it work locally (Jan's dev environment
    # with GCC8 and ASAN, Gentoo).
    CMAKE_OPTIONS="${CMAKE_OPTIONS} -DWITH_PYTHON_BINDINGS=ON"
fi

if [[ $ZUUL_JOB_NAME =~ .*-cover.* ]]; then
    export CFLAGS="${CFLAGS} --coverage"
    export CXXFLAGS="${CXXFLAGS} --coverage"
    export LDFLAGS="${LDFLAGS} --coverage"
fi

PREFIX=~/target
mkdir ${PREFIX}
BUILD_DIR=~/build
mkdir ${BUILD_DIR}
export PATH=${PREFIX}/bin:$PATH
export LD_LIBRARY_PATH=${PREFIX}/lib64:${PREFIX}/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
export PKG_CONFIG_PATH=${PREFIX}/lib64/pkgconfig:${PREFIX}/lib/pkgconfig:${PREFIX}/share/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}

ARTIFACT_URL=""

if [[ "$(jq < ~/zuul-env.json -r '.artifacts[-1].project')" = "CzechLight/dependencies" &&
      "$(jq < ~/zuul-env.json -r '.artifacts[-1].name')" = "tarball" ]]; then
    ARTIFACT_URL=$(jq < ~/zuul-env.json -r '.artifacts[-1].url')
fi

DEP_SUBMODULE_COMMIT=$(git ls-tree -l master submodules/dependencies | cut -d ' ' -f 3)

if [[ -z "${ARTIFACT_URL}" ]]; then
    # fallback to a promoted artifact
    ARTIFACT_URL="https://object-store.cloud.muni.cz/swift/v1/ci-artifacts-${ZUUL_TENANT}/${ZUUL_GERRIT_HOSTNAME}/CzechLight/dependencies/${ZUUL_JOB_NAME%%-cover?(-previous|-diff)}/${DEP_SUBMODULE_COMMIT}.tar.xz"
fi

ARTIFACT_FILE=$(basename ${ARTIFACT_URL})
DEP_HASH_FROM_ARTIFACT=$(echo "${ARTIFACT_FILE}" | sed -e 's/^czechlight-dependencies-//' -e 's/\.tar\.xz$//')
if [[ "${DEP_HASH_FROM_ARTIFACT}" != "${DEP_SUBMODULE_COMMIT}" ]]; then
    echo "Mismatched artifact: HEAD of ./submodules/dependencies does not match artifact commit ref"
    exit 1
fi
curl ${ARTIFACT_URL} --output ${ARTIFACT_FILE}
tar -C ${PREFIX} -xf ${ARTIFACT_FILE}
rm ${ARTIFACT_FILE}

cd ${BUILD_DIR}
cmake -GNinja -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Debug} -DCMAKE_INSTALL_PREFIX=${PREFIX} ${CMAKE_OPTIONS} ${ZUUL_PROJECT_SRC_DIR}
ninja-build
ctest -j${CI_PARALLEL_JOBS} --output-on-failure

if [[ $JOB_PERFORM_EXTRA_WORK == 1 ]]; then
    ninja-build doc
    pushd html
    zip -r ~/zuul-output/docs/html.zip .
    popd
fi

if [[ $LDFLAGS =~ .*--coverage.* ]]; then
    gcovr -j ${CI_PARALLEL_JOBS} --object-directory ${BUILD_DIR} --root ${ZUUL_PROJECT_SRC_DIR} --xml --output ${BUILD_DIR}/coverage.xml
fi