Merge remote-tracking branch 'upstream/master' into indexed-store-path-outputs

1 files changed, 13 insertions, 0 deletions

diff --git a/src/libstore/gc-store.cc b/src/libstore/gc-store.cc
new file mode 100644
index 000000000..3dbdec53b
--- /dev/null
+++ b/src/libstore/gc-store.cc
@@ -0,0 +1,13 @@
+#include "gc-store.hh"
+
+namespace nix {
+
+GcStore & requireGcStore(Store & store)
+{
+    auto * gcStore = dynamic_cast<GcStore *>(&store);
+    if (!gcStore)
+        throw UsageError("Garbage collection not supported by this store");
+    return *gcStore;
+}
+
+}