From db4f4a842515392a6b40f5c86b2ef885c1278451 Mon Sep 17 00:00:00 2001 From: Eelco Dolstra Date: Thu, 14 Aug 2008 13:02:19 +0000 Subject: [PATCH] * Backward compatibility check to prevent nixos-rebuild from barfing when upgrading Nix. --- src/libstore/remote-store.cc | 1 + src/libstore/worker-protocol.hh | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc index bc04c8adb..66e525642 100644 --- a/src/libstore/remote-store.cc +++ b/src/libstore/remote-store.cc @@ -216,6 +216,7 @@ bool RemoteStore::hasSubstitutes(const Path & path) bool RemoteStore::querySubstitutablePathInfo(const Path & path, SubstitutablePathInfo & info) { + if (GET_PROTOCOL_MINOR(daemonVersion) < 3) return false; writeInt(wopQuerySubstitutablePathInfo, to); writeString(path, to); processStderr(); diff --git a/src/libstore/worker-protocol.hh b/src/libstore/worker-protocol.hh index 1146f9577..63e3f0eb8 100644 --- a/src/libstore/worker-protocol.hh +++ b/src/libstore/worker-protocol.hh @@ -8,7 +8,7 @@ namespace nix { #define WORKER_MAGIC_1 0x6e697863 #define WORKER_MAGIC_2 0x6478696f -#define PROTOCOL_VERSION 0x102 +#define PROTOCOL_VERSION 0x103 #define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00) #define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)