deb: retrieve .deb artifacts

sbuild options: unshare, build directory

context: retrieve files

src/deb.rs

@@ -37,7 +37,24 @@ pub fn build_binary_package(
     );
 
     // Run sbuild
-    run_sbuild(&ctx, &remote_dsc_path, arch, series)?;
+    run_sbuild(&ctx, &remote_dsc_path, arch, series, &build_root)?;
+
+    // Retrieve artifacts
+    // Always retrieve to the directory containing the .dsc file
+    let local_output_dir = dsc_path
+        .parent()
+        .ok_or("Could not determine parent directory of dsc file")?;
+    println!("Retrieving artifacts to {}...", local_output_dir.display());
+
+    // Only retrieve .deb files
+    let remote_files = ctx.list_files(Path::new(&build_root))?;
+    for remote_file in remote_files {
+        if remote_file.extension().is_some_and(|ext| ext == "deb") {
+            let file_name = remote_file.file_name().ok_or("Invalid remote filename")?;
+            let local_dest = local_output_dir.join(file_name);
+            ctx.retrieve_path(&remote_file, &local_dest)?;
+        }
+    }
 
     Ok(())
 }
@@ -116,8 +133,11 @@ fn run_sbuild(
     dsc_path: &Path,
     arch: Option<&str>,
     series: Option<&str>,
+    output_dir: &str,
 ) -> Result<(), Box<dyn Error>> {
     let mut cmd = ctx.command("sbuild");
+    cmd.arg("--chroot-mode=unshare");
+
     if let Some(a) = arch {
         cmd.arg(format!("--arch={}", a));
     }
@@ -125,6 +145,9 @@ fn run_sbuild(
         cmd.arg(format!("--dist={}", s));
     }
 
+    // Add output directory argument
+    cmd.arg(format!("--build-dir={}", output_dir));
+
     let status = cmd.arg(dsc_path).status()?;
 
     if !status.success() {