1 files changed, 27 insertions, 0 deletions
diff --git a/tvix/store/src/nar/mod.rs b/tvix/store/src/nar/mod.rs
new file mode 100644
index 000000000000..c1a7fc2a933f
--- /dev/null
+++ b/tvix/store/src/nar/mod.rs
@@ -0,0 +1,27 @@
+use data_encoding::BASE64;
+use tvix_castore::B3Digest;
+
+mod import;
+mod renderer;
+pub use import::read_nar;
+pub use renderer::calculate_size_and_sha256;
+pub use renderer::write_nar;
+
+/// Errors that can encounter while rendering NARs.
+#[derive(Debug, thiserror::Error)]
+pub enum RenderError {
+    #[error("failure talking to a backing store client: {0}")]
+    StoreError(#[source] std::io::Error),
+
+    #[error("unable to find directory {}, referred from {:?}", .0, .1)]
+    DirectoryNotFound(B3Digest, bytes::Bytes),
+
+    #[error("unable to find blob {}, referred from {:?}", BASE64.encode(.0), .1)]
+    BlobNotFound([u8; 32], bytes::Bytes),
+
+    #[error("unexpected size in metadata for blob {}, referred from {:?} returned, expected {}, got {}", BASE64.encode(.0), .1, .2, .3)]
+    UnexpectedBlobMeta([u8; 32], bytes::Bytes, u32, u32),
+
+    #[error("failure using the NAR writer: {0}")]
+    NARWriterError(std::io::Error),
+}