Create `worker_proto::{Read,Write}Conn`

Pass this around instead of `Source &` and `Sink &` directly. This will
give us something to put the protocol version on once the time comes.

To do this ergonomically, we need to expose `RemoteStore::Connection`,
so do that too. Give it some more API docs while we are at it.

1 files changed, 1 insertions, 15 deletions

diff --git a/src/libstore/remote-store.hh b/src/libstore/remote-store.hh
index 4f3971bfd..cb7a71acf 100644
--- a/src/libstore/remote-store.hh
+++ b/src/libstore/remote-store.hh
@@ -166,21 +166,7 @@ public:
 
     void flushBadConnections();
 
-    struct Connection
-    {
-        FdSink to;
-        FdSource from;
-        unsigned int daemonVersion;
-        std::optional<TrustedFlag> remoteTrustsUs;
-        std::optional<std::string> daemonNixVersion;
-        std::chrono::time_point<std::chrono::steady_clock> startTime;
-
-        virtual ~Connection();
-
-        virtual void closeWrite() = 0;
-
-        std::exception_ptr processStderr(Sink * sink = 0, Source * source = 0, bool flush = true);
-    };
+    struct Connection;
 
     ref<Connection> openConnectionWrapper();