Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10' r/724

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1adf74a3706efbcb0ea4625da106fb2
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

1 files changed, 40 insertions, 0 deletions

diff --git a/third_party/nix/tests/gc.sh b/third_party/nix/tests/gc.sh
new file mode 100644
index 000000000000..8b4f8d282184
--- /dev/null
+++ b/third_party/nix/tests/gc.sh
@@ -0,0 +1,40 @@
+source common.sh
+
+drvPath=$(nix-instantiate dependencies.nix)
+outPath=$(nix-store -rvv "$drvPath")
+
+# Set a GC root.
+rm -f "$NIX_STATE_DIR"/gcroots/foo
+ln -sf $outPath "$NIX_STATE_DIR"/gcroots/foo
+
+[ "$(nix-store -q --roots $outPath)" = "$NIX_STATE_DIR/gcroots/foo -> $outPath" ]
+
+nix-store --gc --print-roots | grep $outPath
+nix-store --gc --print-live | grep $outPath
+nix-store --gc --print-dead | grep $drvPath
+if nix-store --gc --print-dead | grep $outPath; then false; fi
+
+nix-store --gc --print-dead
+
+inUse=$(readLink $outPath/input-2)
+if nix-store --delete $inUse; then false; fi
+test -e $inUse
+
+if nix-store --delete $outPath; then false; fi
+test -e $outPath
+
+nix-collect-garbage
+
+# Check that the root and its dependencies haven't been deleted.
+cat $outPath/foobar
+cat $outPath/input-2/bar
+
+# Check that the derivation has been GC'd.
+if test -e $drvPath; then false; fi
+
+rm "$NIX_STATE_DIR"/gcroots/foo
+
+nix-collect-garbage
+
+# Check that the output has been GC'd.
+if test -e $outPath/foobar; then false; fi