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authorEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T13·02+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T13·02+0000
commitdb4f4a842515392a6b40f5c86b2ef885c1278451 (patch)
tree1a4cf69719915670d17ccb742655397f4b427390 /src/libstore
parent1b962fc7206bf3134b2a2097d3db0ee6d2863c47 (diff)
* Backward compatibility check to prevent nixos-rebuild from barfing
  when upgrading Nix.

Diffstat (limited to 'src/libstore')
-rw-r--r--src/libstore/remote-store.cc1
-rw-r--r--src/libstore/worker-protocol.hh2
2 files changed, 2 insertions, 1 deletions
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index bc04c8adb9ab..66e5256422b6 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 1146f9577025..63e3f0eb8922 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)