refactor(tvix/store): implement rename for node::Node r/6546

This returns a node with a new name.

Change-Id: Iebcab537f8dd63d826b9841d4d0181fcb941afdd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9211
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

1 files changed, 11 insertions, 0 deletions

diff --git a/tvix/store/src/proto/mod.rs b/tvix/store/src/proto/mod.rs
index 9ee98d8c1c..c502befe7d 100644
--- a/tvix/store/src/proto/mod.rs
+++ b/tvix/store/src/proto/mod.rs
@@ -203,6 +203,17 @@ impl NamedNode for node::Node {
     }
 }
 
+impl node::Node {
+    /// Returns the node with a new name.
+    pub fn rename(self, name: bytes::Bytes) -> Self {
+        match self {
+            node::Node::Directory(n) => node::Node::Directory(DirectoryNode { name, ..n }),
+            node::Node::File(n) => node::Node::File(FileNode { name, ..n }),
+            node::Node::Symlink(n) => node::Node::Symlink(SymlinkNode { name, ..n }),
+        }
+    }
+}
+
 /// Accepts a name, and a mutable reference to the previous name.
 /// If the passed name is larger than the previous one, the reference is updated.
 /// If it's not, an error is returned.