feat(3p/nix/nix-daemon): Implement Worker::AddSignatures handler r/1383

I got the message proto wrong on this one as well - it needs both a path
and a signatures.

Change-Id: I9a489b1285bda61c15b2a3b47d9cfc3b50e387da
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1270
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

2 files changed, 20 insertions, 1 deletions

diff --git a/third_party/nix/src/nix-daemon/nix-daemon-proto.cc b/third_party/nix/src/nix-daemon/nix-daemon-proto.cc
index 26ae538f29..d94e34cb40 100644
--- a/third_party/nix/src/nix-daemon/nix-daemon-proto.cc
+++ b/third_party/nix/src/nix-daemon/nix-daemon-proto.cc
@@ -227,6 +227,20 @@ class WorkerServiceImpl final : public WorkerService::Service {
     return Status::OK;
   }
 
+  Status AddSignatures(grpc::ServerContext* context,
+                       const nix::proto::AddSignaturesRequest* request,
+                       google::protobuf::Empty* response) override {
+    auto path = request->path().path();
+    store_->assertStorePath(path);
+
+    StringSet sigs;
+    sigs.insert(request->sigs().sigs().begin(), request->sigs().sigs().end());
+
+    store_->addSignatures(path, sigs);
+
+    return Status::OK;
+  }
+
   Status QueryMissing(grpc::ServerContext* context, const StorePaths* request,
                       nix::proto::QueryMissingResponse* response) override {
     std::set<Path> targets;
diff --git a/third_party/nix/src/proto/worker.proto b/third_party/nix/src/proto/worker.proto
index 3dd83d9988..d8d2cc8bbd 100644
--- a/third_party/nix/src/proto/worker.proto
+++ b/third_party/nix/src/proto/worker.proto
@@ -92,7 +92,7 @@ service WorkerService {
 
   // Add signatures to the specified store path. The signatures are not
   // verified.
-  rpc AddSignatures(Signatures) returns (google.protobuf.Empty);
+  rpc AddSignatures(AddSignaturesRequest) returns (google.protobuf.Empty);
 
   // TODO: What does this do?
   rpc NarFromPath(StorePath) returns (StorePath);
@@ -314,6 +314,11 @@ message BuildDerivationResponse {
   string error_message = 2;
 }
 
+message AddSignaturesRequest {
+  StorePath path = 1;
+  Signatures sigs = 2;
+}
+
 message AddToStoreNarRequest {
   oneof add_oneoff {
     PathInfo path_info = 1;