chore(tvix): Thread a std::ostream through Store::buildPaths r/1689

This part of the store API needs to carry a handle to the log sink
from now on, so that it can be passed in as appropriate from the gRPC
handlers.

In all places where there is no such handler available at the moment,
the discarding log sink has been inserted. This can be used as a
convenient grep target in the future.

Change-Id: I26628e30b4c6437dccdf8f722ca2e8ed827dfc19
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1797
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: glittershark <grfn@gws.fyi>

1 files changed, 6 insertions, 4 deletions

diff --git a/third_party/nix/src/libstore/store-api.hh b/third_party/nix/src/libstore/store-api.hh
index 6c125ad2765f..91dd54cfe5f1 100644
--- a/third_party/nix/src/libstore/store-api.hh
+++ b/third_party/nix/src/libstore/store-api.hh
@@ -455,11 +455,13 @@ class Store : public std::enable_shared_from_this<Store>, public Config {
      output paths can be created by running the builder, after
      recursively building any sub-derivations. For inputs that are
      not derivations, substitute them. */
-  [[nodiscard]] virtual absl::Status buildPaths(const PathSet& paths,
-                                                BuildMode buildMode);
+  [[nodiscard]] virtual absl::Status buildPaths(std::ostream& log_sink,
+                                                const PathSet& paths,
+                                                BuildMode build_mode);
 
-  [[nodiscard]] absl::Status buildPaths(const PathSet& paths) {
-    return buildPaths(paths, bmNormal);
+  [[nodiscard]] absl::Status buildPaths(std::ostream& log_sink,
+                                        const PathSet& paths) {
+    return buildPaths(log_sink, paths, bmNormal);
   }
 
   /* Build a single non-materialized derivation (i.e. not from an