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