feat(tvix/castore): add RedbDirectoryService r/8437

This provides a DirectoryService implementation which uses
redb (https://github.com/cberner/redb) as the database. It provides both
in-memory and persistent on-filesystem implementations.

Change-Id: Id8f7c812e2cf401cccd1c382b19907b17a6887bc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12038
Tested-by: BuildkiteCI
Autosubmit: Ilan Joselevich <personal@ilanjoselevich.com>
Reviewed-by: flokli <flokli@flokli.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/tvix/castore/src/digests.rs b/tvix/castore/src/digests.rs
index 2311c95c4ddc..ef9a7326b3fb 100644
--- a/tvix/castore/src/digests.rs
+++ b/tvix/castore/src/digests.rs
@@ -26,6 +26,11 @@ impl From<B3Digest> for bytes::Bytes {
     }
 }
 
+impl From<blake3::Hash> for B3Digest {
+    fn from(value: blake3::Hash) -> Self {
+        Self(Bytes::copy_from_slice(value.as_bytes()))
+    }
+}
 impl From<digest::Output<blake3::Hasher>> for B3Digest {
     fn from(value: digest::Output<blake3::Hasher>) -> Self {
         let v = Into::<[u8; B3_LEN]>::into(value);
@@ -67,6 +72,12 @@ impl From<&[u8; B3_LEN]> for B3Digest {
     }
 }
 
+impl From<B3Digest> for [u8; B3_LEN] {
+    fn from(value: B3Digest) -> Self {
+        value.0.to_vec().try_into().unwrap()
+    }
+}
+
 impl Clone for B3Digest {
     fn clone(&self) -> Self {
         Self(self.0.to_owned())