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source common.sh
clearStore
drvPath1=$($nixinstantiate gc-concurrent.nix -A test1)
outPath1=$($nixstore -q $drvPath1)
drvPath2=$($nixinstantiate gc-concurrent.nix -A test2)
outPath2=$($nixstore -q $drvPath2)
drvPath3=$($nixinstantiate simple.nix)
outPath3=$($nixstore -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.
$nixstore -rvv "$drvPath1" &
pid1=$!
# Start build #2 in the background after 10 seconds.
(sleep 10 && $nixstore -rvv "$drvPath2") &
pid2=$!
# Run the garbage collector while the build is running.
sleep 6
$NIX_BIN_DIR/nix-collect-garbage
# Wait for build #1/#2 to finish.
echo waiting for pid $pid1 to finish...
wait $pid1
echo waiting for pid $pid2 to finish...
wait $pid2
# 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 build #2 has succeeded. It should succeed because the
# derivation is a GC root.
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_BIN_DIR/nix-collect-garbage
! test -e $outPath1
! test -e $outPath2
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