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-rw-r--r--src/libstore/worker-protocol.hh9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libstore/worker-protocol.hh b/src/libstore/worker-protocol.hh
index dcd54ad16..cc083a551 100644
--- a/src/libstore/worker-protocol.hh
+++ b/src/libstore/worker-protocol.hh
@@ -9,7 +9,16 @@ namespace nix {
#define WORKER_MAGIC_1 0x6e697863
#define WORKER_MAGIC_2 0x6478696f
+// This must remain 1.35 (Nix 2.18) forever in Lix, since the protocol has
+// diverged in CppNix such that we cannot assign newer versions ourselves, the
+// protocol is bad in design and implementation and Lix intends to replace it
+// entirely.
#define PROTOCOL_VERSION (1 << 8 | 35)
+// Nix 2.3 is protocol 1.21 (see RemoteStore::initConnection for client,
+// processConnection for server).
+#define MIN_SUPPORTED_MINOR_WORKER_PROTO_VERSION 21
+#define MIN_SUPPORTED_WORKER_PROTO_VERSION (1 << 8 | MIN_SUPPORTED_MINOR_WORKER_PROTO_VERSION)
+
#define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)