Yet another rewrite of the garbage collector

But this time it's *obviously* correct!  No more segfaults due to
infinite recursions for sure, etc.

Also, move directories to /nix/store/trash instead of renaming them to
/nix/store/bla-gc-<pid>.  Then we can just delete /nix/store/trash at
the end.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/libstore/local-store.hh b/src/libstore/local-store.hh
index ebf3f6e2b..bb5a9143c 100644
--- a/src/libstore/local-store.hh
+++ b/src/libstore/local-store.hh
@@ -276,7 +276,11 @@ private:
 
     void deleteGarbage(GCState & state, const Path & path);
 
-    bool tryToDelete(GCState & state, const Path & path);
+    void tryToDelete(GCState & state, const Path & path);
+
+    bool canReachRoot(GCState & state, PathSet & visited, const Path & path);
+
+    void deletePathRecursive(GCState & state, const Path & path);
 
     bool isActiveTempFile(const GCState & state,
         const Path & path, const string & suffix);