A couple of fixes to progress output

Need to have some integration tests.

src/nix/deployment/mod.rs

@@ -284,6 +284,7 @@ impl Deployment {
             // FIXME: Remote builder?
             let nix_options = self.hive.nix_options().await.unwrap();
             let mut builder = host::local(nix_options);
+            builder.set_job(Some(job.clone()));
 
             let map = derivation.realize(&mut *builder).await?;
 

src/nix/host/local.rs

@@ -93,6 +93,10 @@ impl Host for Local {
     async fn active_derivation_known(&mut self) -> NixResult<bool> {
         Ok(true)
     }
+
+    fn set_job(&mut self, job: Option<JobHandle>) {
+        self.job = job;
+    }
 }
 
 impl Local {

src/nix/host/mod.rs

@@ -74,6 +74,9 @@ pub trait Host: Send + Sync + std::fmt::Debug {
     /// exist on the host.
     async fn realize_remote(&mut self, derivation: &StorePath) -> NixResult<Vec<StorePath>>;
 
+    /// Provides a JobHandle to use during operations.
+    fn set_job(&mut self, bar: Option<JobHandle>);
+
     /// Realizes the specified local derivation on the host then retrieves the outputs.
     async fn realize(&mut self, derivation: &StorePath) -> NixResult<Vec<StorePath>> {
         let options = CopyOptions::default();
@@ -122,9 +125,4 @@ pub trait Host: Send + Sync + std::fmt::Debug {
     async fn run_command(&mut self, command: &[&str]) -> NixResult<()> {
         Err(NixError::Unsupported)
     }
-
-    /// Provides a JobHandle to use during operations.
-    #[allow(unused_variables)] 
-    fn set_job(&mut self, bar: Option<JobHandle>) {
-    }
 }