#!/bin/bash

set -ex

# Travis legacy boxes give you 1.5 CPUs, container-based boxes give you 2 CPUs
export NPY_NUM_BUILD_JOBS=2

# setup env
if [ -r /usr/lib/libeatmydata/libeatmydata.so ]; then
  # much faster package installation
  export LD_PRELOAD='/usr/lib/libeatmydata/libeatmydata.so'
elif [ -r /usr/lib/*/libeatmydata.so ]; then
  # much faster package installation
  export LD_PRELOAD='/usr/$LIB/libeatmydata.so'
fi

source builds/venv/bin/activate

# travis venv tests override python
PYTHON=${PYTHON:-python}
PIP=${PIP:-pip}

if [ -n "$PYTHON_OPTS" ]; then
  PYTHON="${PYTHON} $PYTHON_OPTS"
fi

# make some warnings fatal, mostly to match windows compilers
werrors="-Werror=vla -Werror=nonnull -Werror=pointer-arith"
werrors="$werrors -Werror=implicit-function-declaration"

# build with c99 by default

setup_base()
{
  # use default python flags but remove sign-compare
  sysflags="$($PYTHON -c "from distutils import sysconfig; \
    print (sysconfig.get_config_var('CFLAGS'))")"
  export CFLAGS="$sysflags $werrors -Wlogical-op -Wno-sign-compare"

  build_args=()
  # Strictly disable all kinds of optimizations
  if [ -n "$WITHOUT_OPTIMIZATIONS" ]; then
      build_args+=("--disable-optimization")
  # only disable SIMD optimizations
  elif [ -n "$WITHOUT_SIMD" ]; then
      build_args+=("--cpu-baseline=none" "--cpu-dispatch=none")
  elif [ -n "$CPU_DISPATCH" ]; then
      build_args+=("--cpu-dispatch=$CPU_DISPATCH")
  else
    # SIMD extensions that need to be tested on both runtime and compile-time via (test_simd.py)
    # any specified features will be ignored if they're not supported by compiler or platform
    # note: it almost the same default value of --simd-test execpt adding policy `$werror` to treat all
    # warnings as errors
    build_args+=("--simd-test=\$werror BASELINE SSE2 SSE42 XOP FMA4 (FMA3 AVX2) AVX512F AVX512_SKX VSX VSX2 VSX3 NEON ASIMD VX VXE VXE2")
  fi
  if [ -z "$USE_DEBUG" ]; then
    # activates '-Werror=undef' when DEBUG isn't enabled since _cffi_backend'
    # extension breaks the build due to the following error:
    #
    # error: "HAVE_FFI_PREP_CIF_VAR" is not defined, evaluates to 0 [-Werror=undef]
    # #if !HAVE_FFI_PREP_CIF_VAR && defined(__arm64__) && defined(__APPLE__)
    #
    export CFLAGS="$CFLAGS -Werror=undef"
    $PYTHON setup.py build "${build_args[@]}" install 2>&1 | tee log
  else
    # The job run with USE_DEBUG=1 on travis needs this.
    export CFLAGS=$CFLAGS" -Wno-maybe-uninitialized"
    $PYTHON setup.py build "${build_args[@]}" build_src --verbose-cfg build_ext --inplace 2>&1 | tee log
  fi
  grep -v "_configtest" log \
    | grep -vE "ld returned 1|no files found matching" \
    | grep -vE "no previously-included files matching" \
    | grep -vE "manifest_maker: standard file '-c'" \
    | grep -E "warning\>" \
    | tee warnings
  if [ "$LAPACK" != "None" ]; then
    [[ $(wc -l < warnings) -lt 1 ]]
  fi
}

run_test()
{
  # Install the test dependencies.
  # Clear PYTHONOPTIMIZE when running `pip install -r test_requirements.txt`
  # because version 2.19 of pycparser (a dependency of one of the packages
  # in test_requirements.txt) does not provide a wheel, and the source tar
  # file does not install correctly when Python's optimization level is set
  # to strip docstrings (see https://github.com/eliben/pycparser/issues/291).
  PYTHONOPTIMIZE="" $PIP install -r test_requirements.txt pyinstaller
  DURATIONS_FLAG="--durations 10"

  if [ -n "$USE_DEBUG" ]; then
    export PYTHONPATH=$PWD
    export MYPYPATH=$PWD
  fi

  if [ -n "$RUN_COVERAGE" ]; then
    COVERAGE_FLAG=--coverage
  fi

  # We change directories to make sure that python won't find the copy
  # of numpy in the source directory.
  mkdir -p empty
  cd empty
  INSTALLDIR=$($PYTHON -c \
    "import os; import numpy; print(os.path.dirname(numpy.__file__))")
  export PYTHONWARNINGS=default

  # This guard protects against any sudden unexpected changes that may adversely
  # affect the compile-time SIMD features detection which could leave the SIMD code
  # inactivated. Until now we have faced two cases:
  #
  # 1. Hardening the compile-time test files of Neon/ASIMD features without checking
  # the sanity of the modification leading to disabling all optimizations on aarch64.
  # see gh-21747
  #
  # 2. A sudden compiler upgrades by CI side on s390x that causes conflicts with the
  # installed assembler leading to disabling the whole VX/E features, which made us
  # merge SIMD code without testing it. Later, it was discovered that this code
  # disrupted the NumPy build.
  # see gh-21750, gh-21748
  if [ -n "$EXPECT_CPU_FEATURES" ]; then
    as_expected=$($PYTHON << EOF
from numpy.core._multiarray_umath import (__cpu_baseline__, __cpu_dispatch__)
features = __cpu_baseline__ + __cpu_dispatch__
expected = '$EXPECT_CPU_FEATURES'.upper().split()
diff = set(expected).difference(set(features))
if diff:
    print("Unexpected compile-time CPU features detection!\n"
          f"The current build is missing the support of CPU features '{diff}':\n"
          "This error is triggered because of one of the following reasons:\n\n"
          f"1. The compiler for somehow no longer supports any of these CPU features {diff}\n"
          f"Note that the current build reports the support of the following features:\n{features}\n\n"
          "2. Your code messed up the testing process! please check the build log and trace\n"
          "compile-time feature tests and make sure that your patch has nothing to do with the tests failures."
          )
EOF
)
    if [ -n "$as_expected" ]; then
      echo "$as_expected"
      exit 1
    fi
  fi

  if [ -n "$CHECK_BLAS" ]; then
    $PYTHON -m pip install threadpoolctl
    $PYTHON ../tools/openblas_support.py --check_version
  fi

  if [ -n "$RUN_FULL_TESTS" ]; then
    # Travis has a limit on log length that is causeing test failutes.
    # The fix here is to remove the "-v" from the runtest arguments.
    export PYTHONWARNINGS="ignore::DeprecationWarning:virtualenv"
    $PYTHON -b ../runtests.py -n --mode=full $DURATIONS_FLAG $COVERAGE_FLAG
  else
    $PYTHON ../runtests.py -n $DURATIONS_FLAG -- -rs
  fi

  if [ -n "$RUN_COVERAGE" ]; then
    # move back up to the source dir because we want to execute
    # gcov on the source files after the tests have gone through
    # the code paths
    cd ..

    # execute gcov on source files
    find . -name '*.gcno' -type f -exec gcov -pb {} +

    # move the C line coverage report files to the same path
    # as the Python report data
    mv *.gcov empty

    # move back to the previous path for good measure
    # as the Python coverage data is there
    cd empty

    # Upload coverage files to codecov
    bash <(curl -s https://codecov.io/bash) -X gcov -X coveragepy
  fi

  if [ -n "$USE_ASV" ]; then
    pushd ../benchmarks
    $PYTHON `which asv` check --python=same
    $PYTHON `which asv` machine --machine travis
    $PYTHON `which asv` dev -q 2>&1| tee asv-output.log
    if grep -q Traceback asv-output.log; then
      echo "Some benchmarks have errors!"
      exit 1
    fi
    popd
  fi
}


export PYTHON
export PIP

if [ -n "$USE_WHEEL" ] && [ $# -eq 0 ]; then
  # ensure some warnings are not issued
  export CFLAGS=$CFLAGS" -Wno-sign-compare -Wno-unused-result"
  # adjust gcc flags if C coverage requested
  if [ -n "$RUN_COVERAGE" ]; then
     export NPY_DISTUTILS_APPEND_FLAGS=1
     export CC='gcc --coverage'
     export F77='gfortran --coverage'
     export F90='gfortran --coverage'
     export LDFLAGS='--coverage'
  fi
  $PYTHON setup.py build --warn-error build_src --verbose-cfg bdist_wheel
  # Make another virtualenv to install into
  $PYTHON -m venv venv-for-wheel
  . venv-for-wheel/bin/activate
  # Move out of source directory to avoid finding local numpy
  pushd dist
  $PIP install --pre --no-index --upgrade --find-links=. numpy
  popd

  run_test

elif [ -n "$USE_SDIST" ] && [ $# -eq 0 ]; then
  # temporary workaround for sdist failures.
  $PYTHON -c "import fcntl; fcntl.fcntl(1, fcntl.F_SETFL, 0)"
  # ensure some warnings are not issued
  export CFLAGS=$CFLAGS" -Wno-sign-compare -Wno-unused-result"
  $PYTHON setup.py sdist
  # Make another virtualenv to install into
  $PYTHON -m venv venv-for-wheel
  . venv-for-wheel/bin/activate
  # Move out of source directory to avoid finding local numpy
  pushd dist
  $PIP install numpy*
  popd
  run_test
else
  setup_base
  run_test
fi