1 files changed, 100 insertions, 0 deletions
diff --git a/third_party/nix/src/nix/copy.cc b/third_party/nix/src/nix/copy.cc
new file mode 100644
index 0000000000..12a9f9cd33
--- /dev/null
+++ b/third_party/nix/src/nix/copy.cc
@@ -0,0 +1,100 @@
+#include "command.hh"
+#include "shared.hh"
+#include "store-api.hh"
+#include "sync.hh"
+#include "thread-pool.hh"
+
+#include <atomic>
+
+using namespace nix;
+
+struct CmdCopy : StorePathsCommand
+{
+    std::string srcUri, dstUri;
+
+    CheckSigsFlag checkSigs = CheckSigs;
+
+    SubstituteFlag substitute = NoSubstitute;
+
+    CmdCopy()
+        : StorePathsCommand(true)
+    {
+        mkFlag()
+            .longName("from")
+            .labels({"store-uri"})
+            .description("URI of the source Nix store")
+            .dest(&srcUri);
+        mkFlag()
+            .longName("to")
+            .labels({"store-uri"})
+            .description("URI of the destination Nix store")
+            .dest(&dstUri);
+
+        mkFlag()
+            .longName("no-check-sigs")
+            .description("do not require that paths are signed by trusted keys")
+            .set(&checkSigs, NoCheckSigs);
+
+        mkFlag()
+            .longName("substitute-on-destination")
+            .shortName('s')
+            .description("whether to try substitutes on the destination store (only supported by SSH)")
+            .set(&substitute, Substitute);
+    }
+
+    std::string name() override
+    {
+        return "copy";
+    }
+
+    std::string description() override
+    {
+        return "copy paths between Nix stores";
+    }
+
+    Examples examples() override
+    {
+        return {
+            Example{
+                "To copy Firefox from the local store to a binary cache in file:///tmp/cache:",
+                "nix copy --to file:///tmp/cache $(type -p firefox)"
+            },
+            Example{
+                "To copy the entire current NixOS system closure to another machine via SSH:",
+                "nix copy --to ssh://server /run/current-system"
+            },
+            Example{
+                "To copy a closure from another machine via SSH:",
+                "nix copy --from ssh://server /nix/store/a6cnl93nk1wxnq84brbbwr6hxw9gp2w9-blender-2.79-rc2"
+            },
+#ifdef ENABLE_S3
+            Example{
+                "To copy Hello to an S3 binary cache:",
+                "nix copy --to s3://my-bucket?region=eu-west-1 nixpkgs.hello"
+            },
+            Example{
+                "To copy Hello to an S3-compatible binary cache:",
+                "nix copy --to s3://my-bucket?region=eu-west-1&endpoint=example.com nixpkgs.hello"
+            },
+#endif
+        };
+    }
+
+    ref<Store> createStore() override
+    {
+        return srcUri.empty() ? StoreCommand::createStore() : openStore(srcUri);
+    }
+
+    void run(ref<Store> srcStore, Paths storePaths) override
+    {
+        if (srcUri.empty() && dstUri.empty())
+            throw UsageError("you must pass '--from' and/or '--to'");
+
+        ref<Store> dstStore = dstUri.empty() ? openStore() : openStore(dstUri);
+
+        copyPaths(srcStore, dstStore, PathSet(storePaths.begin(), storePaths.end()),
+            NoRepair, checkSigs, substitute);
+    }
+};
+
+static RegisterCommand r1(make_ref<CmdCopy>());