deploy: Use new ostree-ext pruning API

This will ensure we're really pruning everything.
xref coreos/rpm-ostree#4720

Signed-off-by: Colin Walters <walters@verbum.org>

lib/Cargo.toml

@@ -15,7 +15,7 @@ anstream = "0.6.4"
 anstyle = "1.0.4"
 anyhow = "1.0"
 camino = { version = "1.0.4", features = ["serde1"] }
-ostree-ext = { version = "0.12", git = "https://github.com/ostreedev/ostree-rs-ext/"}
+ostree-ext = { version = "0.12.8" }
 chrono = { version = "0.4.23", features = ["serde"] }
 clap = { version= "4.2", features = ["derive"] }
 clap_mangen = { version = "0.2", optional = true }

lib/src/deploy.rs

@@ -122,9 +122,11 @@ pub(crate) async fn pull(
 }
 
 pub(crate) async fn cleanup(sysroot: &SysrootLock) -> Result<()> {
+    // We create clones (just atomic reference bumps) here to move to the thread.
     let repo = sysroot.repo();
     let sysroot = sysroot.sysroot.clone();
     ostree_ext::tokio_util::spawn_blocking_cancellable_flatten(move |cancellable| {
+        let locked_sysroot = &SysrootLock::from_assumed_locked(&sysroot);
         let cancellable = Some(cancellable);
         let repo = &repo;
         let txn = repo.auto_transaction(cancellable)?;
@@ -152,6 +154,17 @@ pub(crate) async fn cleanup(sysroot: &SysrootLock) -> Result<()> {
             }
         }
 
+        let pruned = ostree_container::deploy::prune(locked_sysroot).context("Pruning images")?;
+        if !pruned.is_empty() {
+            let size = glib::format_size(pruned.objsize);
+            println!(
+                "Pruned images: {} (layers: {}, objsize: {})",
+                pruned.n_images, pruned.n_layers, size
+            );
+        } else {
+            tracing::debug!("Nothing to prune");
+        }
+
         Ok(())
     })
     .await
@@ -219,7 +232,6 @@ pub(crate) async fn stage(
         println!("  Version: {version}");
     }
     println!("  Digest: {}", image.manifest_digest);
-    ostree_container::deploy::remove_undeployed_images(sysroot).context("Pruning images")?;
 
     Ok(())
 }