Factor out a `LogStore` interface

Continue progress on #5729.

Just as I hoped, this uncovered an issue: the daemon protocol is missing
a way to query build logs. This doesn't effect `unix://`, but does
effect `ssh://`. A FIXME is left for this, so we come back to it later.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libstore/daemon.cc b/src/libstore/daemon.cc
index ffc605410..1e24a1c79 100644
--- a/src/libstore/daemon.cc
+++ b/src/libstore/daemon.cc
@@ -4,6 +4,7 @@
 #include "build-result.hh"
 #include "store-api.hh"
 #include "gc-store.hh"
+#include "log-store.hh"
 #include "path-with-outputs.hh"
 #include "finally.hh"
 #include "archive.hh"
@@ -953,11 +954,12 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
         logger->startWork();
         if (!trusted)
             throw Error("you are not privileged to add logs");
+        auto & logStore = LogStore::require(*store);
         {
             FramedSource source(from);
             StringSink sink;
             source.drainInto(sink);
-            store->addBuildLog(path, sink.s);
+            logStore.addBuildLog(path, sink.s);
         }
         logger->stopWork();
         to << 1;