#!/usr/bin/bash

set -uexo pipefail

# The custom %check script to run the OpenSSH upstream testsuite in parallel.

#

# The upstream testsuite is serial,

# so the idea here is to split the testsuite into several $PARTS:

# * file-tests

# * interop-tests

# * unit

# * ltests-00

# * ltests-01

# * ...

# * ltests-23

# and run them in parallel, using make, each in its own build subtree.

PARALLEL_MAKEFILE=$1

SPLIT=24

PARTS='file-tests interop-tests unit '

for ((i = 1; i < SPLIT; i++)); do ii=$(printf %02d $i);

    PARTS+="t-exec-$ii "

done

# work around a selinux restriction:

chcon -t unconfined_exec_t ssh-sk-helper || :

# work around something else that only crops up in brew

export TEST_SSH_UNSAFE_PERMISSIONS=1

# create a .test directory to store all our files in:

mkdir -p .t .ltests/{in,not-in}

# patch testsuite: use different ports to avoid port collisions

grep -REi 'port=[2-9][0-9]*' regress

sed -i 's|PORT=4242|PORT=$(expr $TEST_SSH_PORT + 1)|' \

    regress/test-exec.sh*

sed -i 's|^P=3301  # test port|P=$(expr $TEST_SSH_PORT + 1)|' \

    regress/multiplex.sh*

sed -i 's|^fwdport=3301|fwdport=$(expr $TEST_SSH_PORT + 1)|' \

    regress/cfgmatch.sh* regress/cfgmatchlisten.sh*

sed -i 's|^LFWD_PORT=.*|LFWD_PORT=$(expr $TEST_SSH_PORT + 1)|' \

    regress/forward-control.sh*

sed -i 's|^RFWD_PORT=.*|RFWD_PORT=$(expr $TEST_SSH_PORT + 2)|' \

    regress/forward-control.sh*

( ! grep -REi 'port=[2-9][0-9]*' regress)  # try to find more of those

# patch testsuite: speed up

sed -i 's|sleep 1$|sleep .25|' regress/forward-control.sh

# extract LTESTS list to .tests/ltests/all:

grep -Ex 'tests:[[:space:]]*file-tests t-exec interop-tests extra-tests unit' Makefile

echo -ne '\necho-ltests:\n\techo ${LTESTS}' >> regress/Makefile

make -s -C regress echo-ltests | tr ' ' '\n' > .ltests/all

# separate ltests into $SPLIT roughly equal .tests/ltests/in/$ii parts:

grep -qFx connect .ltests/all

( ! grep -qFx nonex .ltests/all )

split -d -a2 --number=l/$SPLIT .ltests/all .ltests/in/

wc -l .ltests/in/*

grep -qFx connect .ltests/in/*

# generate the inverses of them --- .ltests/not-in/$ii:

( ! grep -qFx nonex .ltests/in/* )

for ((i = 0; i < SPLIT; i++)); do ii=$(printf %02d $i);

    while read -r tname; do

        if ! grep -qFx "$tname" ".ltests/in/$ii"; then

            echo -n "$tname " >> ".ltests/not-in/$ii"

        fi

    done < .ltests/all

done

grep . .ltests/not-in/*

( ! grep -q ^connect .ltests/not-in/0 )

for ((i = 1; i < SPLIT; i++)); do ii=$(printf %02d $i);

    grep -q ^connect .ltests/not-in/$ii

done

# prepare several test directories:

for PART in $PARTS; do

    mkdir .t/${PART}

    cp -ra * .t/${PART}/

    sed -i "s|abs_top_srcdir=.*|abs_top_srcdir=$(pwd)/.t/${PART}|" \

        .t/${PART}/Makefile

    sed -i "s|abs_top_builddir=.*|abs_top_builddir=$(pwd)/.t/${PART}|" \

        .t/${PART}/Makefile

    sed -i "s|^BUILDDIR=.*|BUILDDIR=$(pwd)/.t/${PART}|" \

        .t/${PART}/Makefile

done

# finally, run tests $PARTS in parallel in their own subtrees:

time make -f "$PARALLEL_MAKEFILE" -j$(nproc) $PARTS