11ba4ec795
Use a fifo pipe to handle the synchronisation between the different threads rather than relying on delays
80 lines
1.7 KiB
Bash
80 lines
1.7 KiB
Bash
source common.sh
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clearStore
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garbage1=$(nix add-to-store --name garbage1 ./nar-access.sh)
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garbage2=$(nix add-to-store --name garbage2 ./nar-access.sh)
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garbage3=$(nix add-to-store --name garbage3 ./nar-access.sh)
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ls -l $garbage3
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POSIXLY_CORRECT=1 du $garbage3
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fake_free=$TEST_ROOT/fake-free
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export _NIX_TEST_FREE_SPACE_FILE=$fake_free
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echo 1100 > $fake_free
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fifoLock=$TEST_ROOT/fifoLock
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mkfifo "$fifoLock"
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expr=$(cat <<EOF
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with import ./config.nix; mkDerivation {
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name = "gc-A";
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buildCommand = ''
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set -x
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[[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 3 ]]
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mkdir \$out
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echo foo > \$out/bar
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# Pretend that we run out of space
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echo 100 > ${fake_free}.tmp1
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mv ${fake_free}.tmp1 $fake_free
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# Wait for the GC to run
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for i in {1..20}; do
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echo ''\${i}...
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if [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]; then
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exit 0
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fi
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sleep 1
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done
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exit 1
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'';
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}
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EOF
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)
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expr2=$(cat <<EOF
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with import ./config.nix; mkDerivation {
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name = "gc-B";
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buildCommand = ''
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set -x
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mkdir \$out
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echo foo > \$out/bar
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# Wait for the first build to finish
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cat "$fifoLock"
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'';
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}
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EOF
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)
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nix build -v -o $TEST_ROOT/result-A -L "($expr)" \
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--min-free 1000 --max-free 2000 --min-free-check-interval 1 &
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pid1=$!
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nix build -v -o $TEST_ROOT/result-B -L "($expr2)" \
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--min-free 1000 --max-free 2000 --min-free-check-interval 1 &
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pid2=$!
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# Once the first build is done, unblock the second one.
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# If the first build fails, we need to postpone the failure to still allow
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# the second one to finish
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wait "$pid1" || FIRSTBUILDSTATUS=$?
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echo "unlock" > $fifoLock
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( exit ${FIRSTBUILDSTATUS:-0} )
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wait "$pid2"
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[[ foo = $(cat $TEST_ROOT/result-A/bar) ]]
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[[ foo = $(cat $TEST_ROOT/result-B/bar) ]]
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