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Make the gc-auto test more reliable

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Use a fifo pipe to handle the synchronisation between the different
threads rather than relying on delays
This commit is contained in:
regnat 2020-07-02 15:43:35 +02:00
parent c762385457
commit 11ba4ec795
1 changed files with 30 additions and 21 deletions
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51
tests/gc-auto.sh
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@ -13,24 +13,32 @@ fake_free=$TEST_ROOT/fake-free
export _NIX_TEST_FREE_SPACE_FILE=$fake_free
echo 1100 > $fake_free
fifoLock=$TEST_ROOT/fifoLock
mkfifo "$fifoLock"
expr=$(cat <<EOF
with import ./config.nix; mkDerivation {
name = "gc-A";
buildCommand = ''
set -x
[[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 3 ]]
mkdir \$out
echo foo > \$out/bar
echo 1...
sleep 2
echo 200 > ${fake_free}.tmp1
# Pretend that we run out of space
echo 100 > ${fake_free}.tmp1
mv ${fake_free}.tmp1 $fake_free
echo 2...
sleep 2
echo 3...
sleep 2
echo 4...
[[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]
# Wait for the GC to run
for i in {1..20}; do
echo ''\${i}...
if [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]; then
exit 0
fi
sleep 1
done
exit 1
'';
}
EOF
@ -43,15 +51,9 @@ with import ./config.nix; mkDerivation {
set -x
mkdir \$out
echo foo > \$out/bar
echo 1...
sleep 2
echo 200 > ${fake_free}.tmp2
mv ${fake_free}.tmp2 $fake_free
echo 2...
sleep 2
echo 3...
sleep 2
echo 4...
# Wait for the first build to finish
cat "$fifoLock"
'';
}
EOF
@ -59,12 +61,19 @@ EOF
nix build -v -o $TEST_ROOT/result-A -L "($expr)" \
--min-free 1000 --max-free 2000 --min-free-check-interval 1 &
pid=$!
pid1=$!
nix build -v -o $TEST_ROOT/result-B -L "($expr2)" \
--min-free 1000 --max-free 2000 --min-free-check-interval 1
--min-free 1000 --max-free 2000 --min-free-check-interval 1 &
pid2=$!
wait "$pid"
# Once the first build is done, unblock the second one.
# If the first build fails, we need to postpone the failure to still allow
# the second one to finish
wait "$pid1" || FIRSTBUILDSTATUS=$?
echo "unlock" > $fifoLock
( exit ${FIRSTBUILDSTATUS:-0} )
wait "$pid2"
[[ foo = $(cat $TEST_ROOT/result-A/bar) ]]
[[ foo = $(cat $TEST_ROOT/result-B/bar) ]]