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source common.sh
clearStore
lockFifo1=$TEST_ROOT/test1.fifo
mkfifo "$lockFifo1"
drvPath1=$(nix-instantiate gc-concurrent.nix -A test1 --argstr lockFifo "$lockFifo1")
outPath1=$(nix-store -q $drvPath1)
drvPath2=$(nix-instantiate gc-concurrent.nix -A test2)
outPath2=$(nix-store -q $drvPath2)
drvPath3=$(nix-instantiate simple.nix)
outPath3=$(nix-store -r $drvPath3)
(! test -e $outPath3.lock)
touch $outPath3.lock
rm -f "$NIX_STATE_DIR"/gcroots/foo*
ln -s $drvPath2 "$NIX_STATE_DIR"/gcroots/foo
ln -s $outPath3 "$NIX_STATE_DIR"/gcroots/foo2
# Start build #1 in the background. It starts immediately.
nix-store -rvv "$drvPath1" &
pid1=$!
# Wait for the build of $drvPath1 to start
cat $lockFifo1
# Run the garbage collector while the build is running.
nix-collect-garbage
# Unlock the build of $drvPath1
echo "" > $lockFifo1
echo waiting for pid $pid1 to finish...
wait $pid1
# Check that the root of build #1 and its dependencies haven't been
# deleted. The should not be deleted by the GC because they were
# being built during the GC.
cat $outPath1/foobar
cat $outPath1/input-2/bar
# Check that the build build $drvPath2 succeeds.
# It should succeed because the derivation is a GC root.
nix-store -rvv "$drvPath2"
cat $outPath2/foobar
rm -f "$NIX_STATE_DIR"/gcroots/foo*
# The collector should have deleted lock files for paths that have
# been built previously.
(! test -e $outPath3.lock)
# If we run the collector now, it should delete outPath1/2.
nix-collect-garbage
(! test -e $outPath1)
(! test -e $outPath2)
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