nixos-rebuild-ng: avoid copying closure when target_host matches build_host

irgolic · irgolic · commit 610e1e8d4275 · 2026-01-15T14:50:14.000Z
diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py
@@ -224,7 +224,7 @@ def nix_copy(to_host: Remote, from_host: Remote) -> None:
         )
 
     match (to_host, from_host):
-        case (None, None):
+        case (x, y) if x == y:
             return
         case (Remote(_) as host, None) | (None, Remote(_) as host):
             nix_copy_closure(host, to=bool(to_host))

Original file line number	Diff line number	Diff line change
`@@ -224,7 +224,7 @@ def nix_copy(to_host: Remote, from_host: Remote) -> None:`
`224`	`224`	`)`
`225`	`225`
`226`	`226`	`match (to_host, from_host):`
`227`		`- case (None, None):`
	`227`	`+ case (x, y) if x == y:`
`228`	`228`	`return`
`229`	`229`	`case (Remote(_) as host, None) \| (None, Remote(_) as host):`
`230`	`230`	`nix_copy_closure(host, to=bool(to_host))`