4 files changed, 33 insertions, 0 deletions
diff --git a/tvix/build/Cargo.toml b/tvix/build/Cargo.toml
index 7b1594abc3..2782128db3 100644
--- a/tvix/build/Cargo.toml
+++ b/tvix/build/Cargo.toml
@@ -10,6 +10,7 @@ prost = "0.12.1"
 thiserror = "1.0.56"
 tonic = "0.10.2"
 tvix-castore = { path = "../castore" }
+tracing = "0.1.37"
 
 [dependencies.tonic-reflection]
 optional = true
diff --git a/tvix/build/src/buildservice/dummy.rs b/tvix/build/src/buildservice/dummy.rs
new file mode 100644
index 0000000000..d20444755e
--- /dev/null
+++ b/tvix/build/src/buildservice/dummy.rs
@@ -0,0 +1,19 @@
+use tonic::async_trait;
+use tracing::instrument;
+
+use super::BuildService;
+use crate::proto::{Build, BuildRequest};
+
+#[derive(Default)]
+pub struct DummyBuildService {}
+
+#[async_trait]
+impl BuildService for DummyBuildService {
+    #[instrument(skip(self), ret, err)]
+    async fn do_build(&self, _request: BuildRequest) -> std::io::Result<Build> {
+        Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
+            "builds are not supported with DummyBuildService",
+        ))
+    }
+}
diff --git a/tvix/build/src/buildservice/mod.rs b/tvix/build/src/buildservice/mod.rs
new file mode 100644
index 0000000000..cd0b7eb5d7
--- /dev/null
+++ b/tvix/build/src/buildservice/mod.rs
@@ -0,0 +1,12 @@
+use tonic::async_trait;
+
+use crate::proto::{Build, BuildRequest};
+
+mod dummy;
+pub use dummy::DummyBuildService;
+
+#[async_trait]
+pub trait BuildService: Send + Sync {
+    /// TODO: document
+    async fn do_build(&self, request: BuildRequest) -> std::io::Result<Build>;
+}
diff --git a/tvix/build/src/lib.rs b/tvix/build/src/lib.rs
index febacec69e..b173657e43 100644
--- a/tvix/build/src/lib.rs
+++ b/tvix/build/src/lib.rs
@@ -1 +1,2 @@
+pub mod buildservice;
 pub mod proto;