refactor(tvix/castore): drop {Directory,File,Symlink}Node r/8505

Add a `SymlinkTarget` type to represent validated symlink targets.
With this, no invalid states are representable, so we can make `Node` be
just an enum of all three kind of types, and allow access to these
fields directly.

Change-Id: I20bdd480c8d5e64a827649f303c97023b7e390f2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12216
Reviewed-by: benjaminedwardwebb <benjaminedwardwebb@gmail.com>
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: Connor Brewster <cbrewster@hey.com>
Tested-by: BuildkiteCI

1 files changed, 0 insertions, 21 deletions

diff --git a/tvix/castore/src/nodes/symlink_node.rs b/tvix/castore/src/nodes/symlink_node.rs
deleted file mode 100644
index 6b9df96a5dd3..000000000000
--- a/tvix/castore/src/nodes/symlink_node.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use crate::ValidateNodeError;
-
-/// A SymlinkNode represents a symbolic link in a Directory or at the root.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct SymlinkNode {
-    /// The target of the symlink.
-    target: bytes::Bytes,
-}
-
-impl SymlinkNode {
-    pub fn new(target: bytes::Bytes) -> Result<Self, ValidateNodeError> {
-        if target.is_empty() || target.contains(&b'\0') {
-            return Err(ValidateNodeError::InvalidSymlinkTarget(target));
-        }
-        Ok(Self { target })
-    }
-
-    pub fn target(&self) -> &bytes::Bytes {
-        &self.target
-    }
-}