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-rw-r--r--src/libstore/remote-store.cc25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index a1f2db5b0..c9c590787 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -588,6 +588,31 @@ void RemoteStore::addSignatures(const Path & storePath, const StringSet & sigs)
}
+void RemoteStore::queryMissing(const PathSet & targets,
+ PathSet & willBuild, PathSet & willSubstitute, PathSet & unknown,
+ unsigned long long & downloadSize, unsigned long long & narSize)
+{
+ {
+ auto conn(connections->get());
+ if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 19)
+ // Don't hold the connection handle in the fallback case
+ // to prevent a deadlock.
+ goto fallback;
+ conn->to << wopQueryMissing << targets;
+ conn->processStderr();
+ willBuild = readStorePaths<PathSet>(*this, conn->from);
+ willSubstitute = readStorePaths<PathSet>(*this, conn->from);
+ unknown = readStorePaths<PathSet>(*this, conn->from);
+ conn->from >> downloadSize >> narSize;
+ return;
+ }
+
+ fallback:
+ return Store::queryMissing(targets, willBuild, willSubstitute,
+ unknown, downloadSize, narSize);
+}
+
+
RemoteStore::Connection::~Connection()
{
try {