validate

#!/bin/sh

set -e

show_help () {
    cat <<EOF
Usage: $0 [FLAGS]...

Validate GHC source tree against testsuite; see
https://gitlab.haskell.org/ghc/ghc/wikis/testing-patches for more
information.

Flags:
  --no-clean           don't clean first, just carry on from
                       a previous interrupted validation run
  --testsuite-only     don't build the compiler, just run the test suite
  --build-only         don't test the compiler, just build it
  --hpc                build stage2 with -fhpc, and see how much of the
                       compiler the test suite covers.
                       2008-07-01: 63% slower than the default.
                       HTML generated here: testsuite/hpc_output/hpc_index.html
  --fast               Omit binary distribution. Omit certain tests.
  --slow               Build stage2 with -DDEBUG. Run tests for all WAYS,
                       but skip those that call compiler_stats_num_field.
                       2008-07-01: 14% slower than the default.
  --quiet              More pretty build log.
                       See Note [Default build system verbosity].
  --stack              Use Stack to build Hadrian and to provide the bootstrap
                       compiler.
  --ignore-perf-all    Use Hadrian's user settings to ask the "runtests" driver
                       to ignore all changes in performance tests
  --ignore-perf-incrs  Use Hadrian's user settings to ask the "runtests" driver
                       to ignore increases in performance tests
  --ignore-perf-decrs  Use Hadrian's user settings to ask the "runtests" driver
                       to ignore decreases in performance tests
  --debug              Use inbuilt Hadrian flag to generate information for debugging
  --help               shows this usage help.

  validate runs 'hadrian/build -j\$THREADS', where by default THREADS is the
  number of cpus your computer has +1. You can set the environment variable
  THREADS to override this. For a sequential build you would for example use

    THREADS=1 ./validate

  You can set the 'config_args' environment variable to pass flags to
  'configure'.

  You can also use environment variables to pass extra options to the
  testsuite. For example:

    TEST='read001 read002' ./validate --testsuite-only --fast

  Note on BINDIST variable: The BINDIST variable value indicates whether a binary
  distribution of GHC built using Hadrian/Make is to be installed. When set
  to "YES", it indicates that a path, previously set with the --prefix flag in
  the configuration step (./configure), can be used as the installation location.
  Otherwise the binary executables built are placed in sub-directories within
  the "./_validatebuild" directory.

  Note on validate vs GitLab CI setup: This script is distinct from the
  collection of validation settings used by the GitLab Continuous Integration
  system (details in ./.gitlab-ci.yml) and can be run locally on a user's computer
  system. The CI scripts are stored in the ./.gitlab directory for reference.

EOF
}

# Note [validate and testsuite speed]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# There are 3 different validate and testsuite speed settings:
# fast, normal and slow.
#
#                              how    how   used
#           cd tests  config.  many   many  by
# validate  && make   speed=   tests  ways  whom
# =============================================================================
# --fast    fast      2        some   1+exs Travis (to stay within time limit)
# --normal  test      1        all    1+exs Phabricator (slow takes too long?)
# --slow    slow      0        all    all   Nightly (slow is ok)
#
#           accept    1        all    1
#
# `--fast` and `--normal` run one default way, as well as any other ways which
# are explicitly requested by the test using extra_ways().
#
# `make accept` should run all tests exactly once. There is no point in
# accepting a test for multiple ways, since it should produce the same output
# for all ways.
#
# To make sure all .stderr and .stdout files in the testsuite are never
# out-of-date, it is useful if CI runs each test at least once.

# Note [Default build system verbosity]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# From https://gitlab.haskell.org/ghc/ghc/wikis/design/build-system:
#
#   "The build system should clearly report what it's doing (and sometimes
#   why), without being too verbose. It should emit actual command lines as
#   much as possible, so that they can be inspected and cut & pasted."
#
# That should be the default. Only suppress commands, by setting V=0 and using
# `make -s`, when user explicitly asks for it with `./validate --quiet`.

no_clean=0
testsuite_only=0
build_only=0
hpc=NO
speed=NORMAL
be_quiet=0
# Validate uses gzip compression for the binary distribution to avoid the rather
# heavy cost of xz, which is the typical default.
tar_comp=gzip
use_stack=NO
ignore_perf_all=NO
ignore_perf_increases=NO
ignore_perf_decreases=NO
hadrian_build_root=_validatebuild
basedir="$($(dirname $hadrian_build_root) 2>&1 /dev/null && pwd)"
debugging=0

# Set config_args to empty string if not already set
if [ "${config_args:-""}" ]; then
    CONFIG_ARGS="$config_args"
fi

while [ $# -gt 0 ]
do
    case "$1" in
    --no-clean)
        no_clean=1
        ;;
    --testsuite-only)
        testsuite_only=1
        ;;
    --build-only)
        build_only=1
        ;;
    --hpc)
        hpc=YES
        ;;
    --slow)
        speed=SLOW
        ;;
    --fast)
        speed=FAST
        ;;
    --normal) # for backward compat
        speed=NORMAL
        ;;
    --quiet)
        be_quiet=1
        ;;
    --stack)
        use_stack=YES
        ;;
    --ignore-perf-all)
        ignore_perf_all=YES
        ;;
    --ignore-perf-incrs)
        ignore_perf_increases=YES
        ;;
    --ignore-perf-decrs)
        ignore_perf_decreases=YES
        ;;
    --debug)
        debugging=1
        ;;
    --help)
        show_help
        exit 0;;
    *)
        echo "$0: unrecognized argument '$1'" >&2
        echo "Try '$0 --help' for more information." >&2
        exit 1;;
    esac
    shift
done

check_packages () {
    if [ "$bindistdir" = "" ]; then
        ghc_pkg=$basedir/$hadrian_build_root/stage1/bin/ghc-pkg
    else
        ghc_pkg=$basedir/$bindistdir/bin/ghc-pkg
    fi

    if [ $be_quiet -eq 1 ]; then
        "$ghc_pkg" check
    else
        echo "== Start $1 package check"
        "$ghc_pkg" check -v
        echo "== End $1 package check"
    fi
}

if ! [ -d testsuite ]; then
    echo 'Could not find the testsuite for validation' >&2
    exit 1
fi

CPUS=$(mk/detect-cpu-count.sh)

# Use CPU cores + 1 if not already set
threads=${THREADS:-$((CPUS + 1))}
echo "using THREADS=${threads}" >&2

configure_cmd="./configure"

# Figure out name of `make`, needed to install binary distributions
make="gmake"
if type gmake > /dev/null 2> /dev/null ; then
    make="gmake"
else
    make="make"
fi
if [ $be_quiet -eq 1 ]; then
    # See Note [Default build system verbosity].
    make="$make -s"
fi

# Set up configuration, commands for building
if [ "$use_stack" = "NO" ]; then
    hadrian/build --help > /dev/null
    echo "Entering ./hadrian directory..."
    cd hadrian
    hadrian_cmd=$(cabal new-exec -- which hadrian | grep 'hadrian$')
else
    if [ $no_clean -eq 0 ]; then
        rm -rf hadrian/.stack-work
    fi
    hadrian/build-stack --help > /dev/null
    echo "Entering ./hadrian directory..."
    cd hadrian
    hadrian_cmd=$(stack exec -- which hadrian)
    configure_cmd="stack --stack-yaml hadrian/stack.yaml exec -- ./configure"
fi
cd ..
echo "Back to $basedir"
echo "Hadrian configure command: $configure_cmd"
hadrian="$hadrian_cmd -j$threads --build-root=$hadrian_build_root"
if [ $be_quiet -eq 0 ]; then
    hadrian="$hadrian -V"
fi

echo "Hadrian command: $hadrian"

# For details of the following flavours, refer to
# ./hadrian/src/Settings/Flavours
case $speed in
SLOW)
    flavour=slow-validate ;;
NORMAL)
    flavour=validate ;;
FAST)
    flavour=quick-validate ;;
esac

if [ $build_only -eq 1 ] ||
    { [ $build_only -eq 0 ] && [ $testsuite_only -eq 0 ]; }; then

    if [ $no_clean -eq 0 ]; then
        $hadrian clean && rm -rf $hadrian_build_root
        python3 ./boot
        $configure_cmd --enable-tarballs-autodownload $CONFIG_ARGS
    fi

    if [ $debugging -eq 1 ]; then
        hadrian="$hadrian --debug"
    fi

    $hadrian --flavour=$flavour

    check_packages post-build

    # -------------------------------------------------------------------------
    # Build a binary distribution (not --fast)

    if [ $speed != "FAST" ]; then
        # Set bindistdir only when a binary distribution is built
        bindistdir="bindisttest/install   dir"
        ghc="$basedir/$bindistdir/bin/ghc"

        $hadrian binary-dist --docs=no-sphinx
        cfgdir="$(dirname "$(find $hadrian_build_root/bindist/ -name 'configure' | head -1)")"
        cd "$cfgdir"
        ./configure --prefix="$basedir/$bindistdir" && make install
        cd "$basedir"
        "$ghc" -e 'Data.Text.IO.putStrLn (Data.Text.pack "bindist test: OK")'

        check_packages post-install

        cd "$basedir/libraries/xhtml"
        dynamicGhc=$("$ghc" --info | grep "GHC Dynamic" | cut -d',' -f3 | cut -d'"' -f2)
        if [ "$dynamicGhc" = "NO" ]; then
            libFlags="--disable-shared --enable-library-vanilla"
        else
            libFlags="--enable-shared --disable-library-vanilla"
        fi
        libFlags="$libFlags --disable-library-prof"

        "$ghc" --make Setup

        # shellcheck disable=SC2086
        ./Setup configure \
            --with-ghc="$ghc" \
            --with-haddock="$basedir/$bindistdir/bin/haddock" $libFlags \
            --global --builddir=dist-bindist \
            --prefix="$basedir/$bindistdir"
        ./Setup build --builddir=dist-bindist
        ./Setup haddock -v0 --ghc-options=-optP-P --builddir=dist-bindist
        ./Setup install --builddir=dist-bindist
        ./Setup clean --builddir=dist-bindist
        rm -f Setup Setup.exe Setup.hi Setup.o
        cd "$basedir"

        check_packages post-xhtml
    fi

    if [ $build_only -eq 1 ]; then
        cat <<EOF
-------------------------------------------------------------------
Congratulations!  This tree has compiled successfully.

You can now test your new compiler using ./validate --testsuite-only.
EOF
    exit 0
    fi
fi # Done with building the compiler and packages

if [ "$hpc" = YES ]; then
    # XXX With threads we'd need to give a different tix file to each thread
    #     and then sum them up at the end
    threads=1
    HPCTIXFILE=$basedir/testsuite/hpc_output/ghc.tix
    export HPCTIXFILE
    rm -f "$HPCTIXFILE"
fi

case "$speed" in
SLOW)
    MAKE_TEST_TARGET=slowtest
    BINDIST="BINDIST=YES"
    HADRIAN_TEST_SPEED=slow
    ;;
NORMAL)
    # shellcheck disable=2209
    MAKE_TEST_TARGET=test
    BINDIST="BINDIST=YES"
    HADRIAN_TEST_SPEED=normal
    ;;
FAST)
    MAKE_TEST_TARGET=fasttest
    BINDIST="BINDIST=NO"
    HADRIAN_TEST_SPEED=fast
    ;;
esac

if [ $be_quiet -eq 1 ] && [ -z "${VERBOSE+ }" ]; then
    TEST_VERBOSITY="VERBOSE=1"
fi

# We need to be quite picky on Windows about which Python interpreter we use
# (#12554, #12661). Allow the user to override it.
if [ "z$PYTHON" == "z" ]; then
    PYTHON="$(which python3)"
fi
if [ "z$PYTHON" == "z" ]; then
    PYTHON="$(which python)"
fi
PYTHON_ARG="PYTHONPATH=$PYTHON"

if [ "$ignore_perf_all" = "YES" ]; then
    test_perf_args="runtest.opts +=--ignore-perf-failures=all"
elif [ "$ignore_perf_increases" = "YES" ]; then
    test_perf_args="runtest.opts +=--ignore-perf-failures=increases"
elif [ "$ignore_perf_decreases" = "YES" ]; then
    test_perf_args="runtest.opts +=--ignore-perf-failures=decreases"
fi

# Run the testsuite
if [ $testsuite_only -eq 1 ] ||
    { [ $build_only -eq 0 ] && [ $testsuite_only -eq 0 ]; };  then

    cd "$basedir"
    rm -f testsuite_summary.txt testsuite_summary_stage1.txt testsuite.xml

    # If the --fast flag is used, make the test ghc an in-tree compiler
    if  [ -d  "$basedir/bindisttest/install   dir"  ] && [ $BINDIST = "BINDIST=YES" ]; then
        testghc="$basedir/bindisttest/install   dir/bin/ghc"
    elif [ $BINDIST = "BINDIST=NO" ]; then
        testghc="stage2"
    fi

    hadrian_test_with_args="test --test-speed=$HADRIAN_TEST_SPEED \
        --test-compiler=\"$testghc\" \
        --summary=$basedir/testsuite_summary.txt \
        --summary-junit=$basedir/testsuite.xml"
    sh -c "$hadrian $hadrian_test_with_args \"$test_perf_args\""

    # Use stage1 compiler when BINDIST=NO
    if [ "$BINDIST" = "NO" ] && [ ! -d "bindisttest/install   dir" ]; then
        hadrian_test_with_args_stage1="test --test-speed=$HADRIAN_TEST_SPEED \
            --test-root-dirs=\"$basedir/testsuite/tests/stage1\" \
            --test-compiler=\"$testghc\" \
            --summary=$basedir/testsuite_summary_stage1.txt \
            --summary-junit=$basedir/testsuite_stage1.xml"
        sh -c "$hadrian $hadrian_test_with_args_stage1 \"$test_perf_args\""

        echo '==== STAGE 1 TESTS (using Hadrian) ==== '
        cat testsuite_summary_stage1.txt
    fi

    echo '==== STAGE 2 TESTS (using Hadrian) ==== '
    cat testsuite_summary.txt

    echo "Checking packages after running the testsuite..."
    check_packages post-testsuite
fi # Test run is complete

if [ "$hpc" = YES ]
then
    "$basedir"/utils/hpc/hpc markup --hpcdir=. --srcdir=compiler \
    --srcdir=testsuite/hpc_output --destdir=testsuite/hpc_output testsuite/hpc_output/ghc.tix
fi

if  grep '\<0 caused framework failures' testsuite_summary.txt >/dev/null 2>/dev/null &&
    grep '\<0 unexpected passes' testsuite_summary.txt >/dev/null 2>/dev/null &&
    grep '\<0 unexpected failures' testsuite_summary.txt >/dev/null 2>/dev/null; then

    no_hadrian_stage_2_failures=1

    if [ "$BINDIST" = "NO" ]; then
        grep '\<0 caused framework failures' testsuite_summary_stage1.txt >/dev/null 2>/dev/null &&
        grep '\<0 unexpected passes' testsuite_summary_stage1.txt >/dev/null 2>/dev/null &&
        grep '\<0 unexpected failures' testsuite_summary_stage1.txt >/dev/null 2>/dev/null;

            no_hadrian_stage_1_failures=1
    fi

    if [ "$BINDIST" = "NO" ]; then
        no_hadrian_test_failures=$no_hadrian_stage_1_failures && $no_hadrian_stage_2_failures
    else
        no_hadrian_test_failures=$no_hadrian_stage_2_failures
    fi
fi
if grep '\<0 unexpected stat failures' testsuite_summary.txt >/dev/null 2>/dev/null; then

    no_hadrian_perf_test_failures=1
fi

if [ $no_hadrian_test_failures ] || [ $no_make_test_failures ]; then
    if [ $no_hadrian_perf_test_failures -eq 1 ] ||
                                [ $no_make_perf_test_failures -eq 1 ]; then
        if [ "$ignore_perf_all" = "YES" ] ||
           [ "$ignore_perf_increases" = "YES" ] ||
           [ "$ignore_perf_decreases" = "YES" ]; then
           cat <<EOF
--------------------------------------------------------------------
Changes in metrics for performance tests were ignored in this test run.
If you want to either log changes in performance test metrics on your
commits or want to compare the metrics produced by your commits to the
current CI performance metrics, use the instructions at
https://gitlab.haskell.org/ghc/ghc/-/wikis/building/running-tests/performance-tests#ci-performance-metrics
to do so.
--------------------------------------------------------------------
EOF
        else
            cat <<EOF
--------------------------------------------------------------------
Performance test failures could not be detected in this test run. For
adding new performance tests (if applicable) along with you changes,
refer to https://gitlab.haskell.org/ghc/ghc/-/wikis/building/running-tests/adding#performance-tests
--------------------------------------------------------------------
EOF
        fi
    fi
    if [ $testsuite_only -eq 0 ] && [ $no_clean -eq 0 ]; then
        cat <<EOF
-------------------------------------------------------------------
Congratulations!  This tree has passed minimal testing.

NOTE: If you have made changes that may cause failures not tested for by
the minimal testing procedure, please do further testing as necessary.

When you are satisfied that you haven't broken anything, go ahead and
push/send your patches.
EOF
        if [ -f mk/validate.mk ] && grep -q "^[^#]" mk/validate.mk ; then
            cat <<EOF

WARNING: You seem to have things set in mk/validate.mk. Please check
that it is OK before pushing.
EOF
        fi
    else
        cat <<EOF
-------------------------------------------------------------------
I didn't find any problems, but this wasn't a complete validate run,
so be careful!

NOTE: If you have made changes that may cause failures not tested for by
the minimal testing procedure, please do further testing as necessary.
-------------------------------------------------------------------
EOF
    fi
else
    if [ -z "${no_hadrian_perf_test_failures}" ] ||
                    [ -z "${no_make_perf_test_failures}" ]; then
        cat <<EOF
--------------------------------------------------------------------
Unexpected performance test failures occured in this run. Please
refer to instructions at
https://gitlab.haskell.org/ghc/ghc/-/wikis/building/running-tests/performance-tests
to pin-point the cause.
--------------------------------------------------------------------
EOF
    fi
    if [ $be_quiet -eq 0 ]; then
       cat <<EOF
-------------------------------------------------------------------
Oops!  Looks like you have some unexpected test results or framework failures.
Please fix them before pushing/sending patches.
-------------------------------------------------------------------
EOF
    fi
    exit 1
fi