1 files changed, 29 insertions, 0 deletions
diff --git a/src/libfetchers/tree-info.hh b/src/libfetchers/tree-info.hh
new file mode 100644
index 000000000..2c7347281
--- /dev/null
+++ b/src/libfetchers/tree-info.hh
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "path.hh"
+#include "hash.hh"
+
+#include <nlohmann/json_fwd.hpp>
+
+namespace nix { class Store; }
+
+namespace nix::fetchers {
+
+struct TreeInfo
+{
+    Hash narHash;
+    std::optional<uint64_t> revCount;
+    std::optional<time_t> lastModified;
+
+    bool operator ==(const TreeInfo & other) const
+    {
+        return
+            narHash == other.narHash
+            && revCount == other.revCount
+            && lastModified == other.lastModified;
+    }
+
+    StorePath computeStorePath(Store & store) const;
+};
+
+}