1 files changed, 36 insertions, 0 deletions
diff --git a/third_party/nix/src/nix/dump-path.cc b/third_party/nix/src/nix/dump-path.cc
new file mode 100644
index 000000000000..f411c0cb7c89
--- /dev/null
+++ b/third_party/nix/src/nix/dump-path.cc
@@ -0,0 +1,36 @@
+#include "command.hh"
+#include "store-api.hh"
+
+using namespace nix;
+
+struct CmdDumpPath : StorePathCommand
+{
+    std::string name() override
+    {
+        return "dump-path";
+    }
+
+    std::string description() override
+    {
+        return "dump a store path to stdout (in NAR format)";
+    }
+
+    Examples examples() override
+    {
+        return {
+            Example{
+                "To get a NAR from the binary cache https://cache.nixos.org/:",
+                "nix dump-path --store https://cache.nixos.org/ /nix/store/7crrmih8c52r8fbnqb933dxrsp44md93-glibc-2.25"
+            },
+        };
+    }
+
+    void run(ref<Store> store, const Path & storePath) override
+    {
+        FdSink sink(STDOUT_FILENO);
+        store->narFromPath(storePath, sink);
+        sink.flush();
+    }
+};
+
+static RegisterCommand r1(make_ref<CmdDumpPath>());