feat(downloaders): add file-client feature gate (#18707)

crates/net/downloaders/Cargo.toml

@@ -31,7 +31,7 @@ reth-testing-utils = { workspace = true, optional = true }
 alloy-consensus.workspace = true
 alloy-eips.workspace = true
 alloy-primitives.workspace = true
-alloy-rlp.workspace = true
+alloy-rlp = { workspace = true, optional = true }
 
 # async
 futures.workspace = true
@@ -40,7 +40,7 @@ pin-project.workspace = true
 tokio = { workspace = true, features = ["sync", "fs", "io-util"] }
 tokio-stream.workspace = true
 tokio-util = { workspace = true, features = ["codec"] }
-async-compression = { workspace = true, features = ["gzip", "tokio"] }
+async-compression = { workspace = true, features = ["gzip", "tokio"], optional = true }
 
 # metrics
 reth-metrics.workspace = true
@@ -55,6 +55,7 @@ tempfile = { workspace = true, optional = true }
 itertools.workspace = true
 
 [dev-dependencies]
+async-compression = { workspace = true, features = ["gzip", "tokio"] }
 reth-ethereum-primitives.workspace = true
 reth-chainspec.workspace = true
 reth-db = { workspace = true, features = ["test-utils"] }
@@ -71,6 +72,8 @@ rand.workspace = true
 tempfile.workspace = true
 
 [features]
+default = []
+file-client = ["dep:async-compression", "dep:alloy-rlp"]
 test-utils = [
     "tempfile",
     "reth-db-api",

crates/net/downloaders/src/lib.rs

@@ -3,6 +3,7 @@
 //! ## Feature Flags
 //!
 //! - `test-utils`: Export utilities for testing
+//! - `file-client`: Enables the file-based clients for reading blocks and receipts from files.
 
 #![doc(
     html_logo_url = "https://raw.githubusercontent.com/paradigmxyz/reth/main/assets/reth-docs.png",
@@ -25,20 +26,24 @@ pub mod metrics;
 ///
 /// Contains [`FileClient`](file_client::FileClient) to read block data from files,
 /// efficiently buffering headers and bodies for retrieval.
+#[cfg(any(test, feature = "file-client"))]
 pub mod file_client;
 
 /// Module managing file-based data retrieval and buffering of receipts.
 ///
 /// Contains [`ReceiptFileClient`](receipt_file_client::ReceiptFileClient) to read receipt data from
 /// files, efficiently buffering receipts for retrieval.
+#[cfg(any(test, feature = "file-client"))]
 pub mod receipt_file_client;
 
 /// Module with a codec for reading and encoding block bodies in files.
 ///
 /// Enables decoding and encoding `Block` types within file contexts.
+#[cfg(any(test, feature = "file-client"))]
 pub mod file_codec;
 
 #[cfg(any(test, feature = "test-utils"))]
 pub mod test_utils;
 
+#[cfg(any(test, feature = "file-client"))]
 pub use file_client::{DecodedFileChunk, FileClientError};

crates/net/downloaders/src/test_utils/mod.rs

@@ -2,6 +2,7 @@
 
 #![allow(dead_code)]
 
+#[cfg(any(test, feature = "file-client"))]
 use crate::{bodies::test_utils::create_raw_bodies, file_codec::BlockFileCodec};
 use alloy_primitives::B256;
 use futures::SinkExt;
@@ -37,6 +38,7 @@ pub(crate) fn generate_bodies(
 
 /// Generate a set of bodies, write them to a temporary file, and return the file along with the
 /// bodies and corresponding block hashes
+#[cfg(any(test, feature = "file-client"))]
 pub(crate) async fn generate_bodies_file(
     range: RangeInclusive<u64>,
 ) -> (tokio::fs::File, Vec<SealedHeader>, HashMap<B256, BlockBody>) {