chore(tvix/store): move NAR rendering logic into Renderer struct r/5915

This moves the logic rendering NARs to a struct using the
previously introduced, more granular BlobService, ChunkService and
DirectoryService.

Instead of passing them around to the helper functions, they're kept as
members of a struct.

Remove the async invocations in the nar_renderer tests, there's nothing
async in here.

Change-Id: Ic6d24aaad68a1fda46ce29f2cdb5f7b87f481d5c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8095
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI

1 files changed, 0 insertions, 70 deletions

diff --git a/tvix/store/src/nar.rs b/tvix/store/src/nar.rs
deleted file mode 100644
index efcaf652e138..000000000000
--- a/tvix/store/src/nar.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-//! This provides some common "client-side" libraries to interact with a tvix-
-//! store, in this case to render NAR.
-use crate::{
-    client::StoreClient,
-    proto::{self, NamedNode},
-};
-use anyhow::Result;
-use nix_compat::nar;
-
-/// Consumes a [proto::node::Node] pointing to the root of a (store) path,
-/// and writes the contents in NAR serialization to the passed
-/// [std::io::Write].
-///
-/// It uses a [StoreClient] to do the necessary lookups as it traverses the
-/// structure.
-pub fn write_nar<W: std::io::Write, SC: StoreClient>(
-    w: &mut W,
-    proto_root_node: proto::node::Node,
-    store_client: &mut SC,
-) -> Result<()> {
-    // Initialize NAR writer
-    let nar_root_node = nar::writer::open(w)?;
-
-    walk_node(nar_root_node, proto_root_node, store_client)
-}
-
-/// Process an intermediate node in the structure.
-/// This consumes the node.
-fn walk_node<SC: StoreClient>(
-    nar_node: nar::writer::Node,
-    proto_node: proto::node::Node,
-    store_client: &mut SC,
-) -> Result<()> {
-    match proto_node {
-        proto::node::Node::Symlink(proto_symlink_node) => {
-            nar_node.symlink(&proto_symlink_node.target)?;
-        }
-        proto::node::Node::File(proto_file_node) => {
-            nar_node.file(
-                proto_file_node.executable,
-                proto_file_node.size.into(),
-                &mut store_client.open_blob(proto_file_node.digest)?,
-            )?;
-        }
-        proto::node::Node::Directory(proto_directory_node) => {
-            // look up that node from the store client
-            let proto_directory = store_client.get_directory(proto_directory_node.digest)?;
-
-            // if it's None, that's an error!
-            if proto_directory.is_none() {
-                // TODO: proper error handling
-                panic!("not found!")
-            }
-
-            // start a directory node
-            let mut nar_node_directory = nar_node.directory()?;
-
-            // for each node in the directory, create a new entry with its name,
-            // and then invoke walk_node on that entry.
-            for proto_node in proto_directory.unwrap().nodes() {
-                let child_node = nar_node_directory.entry(proto_node.get_name())?;
-                walk_node(child_node, proto_node, store_client)?;
-            }
-
-            // close the directory
-            nar_node_directory.close()?;
-        }
-    }
-    Ok(())
-}