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)