refactor: remove unnecessarily wrap value into a Result

this simplify code and remove some unwrap.
warning: this function's return value is unnecessarily wrapped by `Result`
help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.93.0/index.html#unnecessary_wraps

Cargo.toml

@@ -186,6 +186,7 @@ doc_markdown = "warn"
 manual_midpoint = "warn"
 semicolon_if_nothing_returned = "warn"
 unnecessary_semicolon = "warn"
+unnecessary_wraps = "warn"
 
 # nursery lints configuration
 # or_fun_call = "warn" # enable it to help detect non trivial code used in `_or` method

src/api/s3/get.rs

@@ -126,7 +126,7 @@ fn handle_http_precondition(
 ) -> Result<Option<Response<ResBody>>, Error> {
 	let precondition_headers = PreconditionHeaders::parse(req)?;
 
-	if let Some(status_code) = precondition_headers.check(version, &version_meta.etag)? {
+	if let Some(status_code) = precondition_headers.check(version, &version_meta.etag) {
 		let mut response = object_headers(
 			version,
 			version_meta,
@@ -877,7 +877,7 @@ impl PreconditionHeaders {
 		})
 	}
 
-	fn check(&self, v: &ObjectVersion, etag: &str) -> Result<Option<StatusCode>, Error> {
+	fn check(&self, v: &ObjectVersion, etag: &str) -> Option<StatusCode> {
 		// we store date with ms precision, but headers are precise to the second: truncate
 		// the timestamp to handle the same-second edge case
 		let v_date = UNIX_EPOCH + Duration::from_secs(v.timestamp / 1000);
@@ -887,32 +887,32 @@ impl PreconditionHeaders {
 		if let Some(im) = &self.if_match {
 			// Step 1: if-match is present
 			if !im.iter().any(|x| x == etag || x == "*") {
-				return Ok(Some(StatusCode::PRECONDITION_FAILED));
+				return Some(StatusCode::PRECONDITION_FAILED);
 			}
 		} else if let Some(ius) = &self.if_unmodified_since {
 			// Step 2: if-unmodified-since is present, and if-match is absent
 			if v_date > *ius {
-				return Ok(Some(StatusCode::PRECONDITION_FAILED));
+				return Some(StatusCode::PRECONDITION_FAILED);
 			}
 		}
 
 		if let Some(inm) = &self.if_none_match {
 			// Step 3: if-none-match is present
 			if inm.iter().any(|x| x == etag || x == "*") {
-				return Ok(Some(StatusCode::NOT_MODIFIED));
+				return Some(StatusCode::NOT_MODIFIED);
 			}
 		} else if let Some(ims) = &self.if_modified_since {
 			// Step 4: if-modified-since is present, and if-none-match is absent
 			if v_date <= *ims {
-				return Ok(Some(StatusCode::NOT_MODIFIED));
+				return Some(StatusCode::NOT_MODIFIED);
 			}
 		}
 
-		Ok(None)
+		None
 	}
 
 	pub(crate) fn check_copy_source(&self, v: &ObjectVersion, etag: &str) -> Result<(), Error> {
-		match self.check(v, etag)? {
+		match self.check(v, etag) {
 			Some(_) => Err(Error::PreconditionFailed),
 			None => Ok(()),
 		}

src/api/s3/list.rs

@@ -296,7 +296,7 @@ pub async fn handle_list_parts(
 		},
 	);
 
-	let (info, next) = fetch_part_info(query, &mpu)?;
+	let (info, next) = fetch_part_info(query, &mpu);
 
 	let result = s3_xml::ListPartsResult {
 		xmlns: (),
@@ -526,7 +526,7 @@ where
 fn fetch_part_info<'a>(
 	query: &ListPartsQuery,
 	mpu: &'a MultipartUpload,
-) -> Result<(Vec<PartInfo<'a>>, Option<u64>), Error> {
+) -> (Vec<PartInfo<'a>>, Option<u64>) {
 	assert!((1..=1000).contains(&query.max_parts)); // see s3/api_server.rs
 
 	// Parse multipart upload part list, removing parts not yet finished
@@ -565,10 +565,10 @@ fn fetch_part_info<'a>(
 	if parts.len() > query.max_parts as usize {
 		parts.truncate(query.max_parts as usize);
 		let pagination = Some(parts.last().unwrap().part_number);
-		return Ok((parts, pagination));
+		return (parts, pagination);
 	}
 
-	Ok((parts, None))
+	(parts, None)
 }
 
 /*
@@ -1255,7 +1255,7 @@ mod tests {
 	}
 
 	#[test]
-	fn test_fetch_part_info() -> Result<(), Error> {
+	fn test_fetch_part_info() {
 		let mut query = ListPartsQuery {
 			bucket_name: "a".to_string(),
 			key: "a".to_string(),
@@ -1267,7 +1267,7 @@ mod tests {
 		let mpu = mpu();
 
 		// Start from the beginning but with limited size to trigger pagination
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert_eq!(pagination.unwrap(), 3);
 		assert_eq!(
 			info,
@@ -1291,7 +1291,7 @@ mod tests {
 
 		// Use previous pagination to make a new request
 		query.part_number_marker = Some(pagination.unwrap());
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(
 			info,
@@ -1315,14 +1315,14 @@ mod tests {
 
 		// Trying to access a part that is way larger than registered ones
 		query.part_number_marker = Some(9999);
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(info, vec![]);
 
 		// Try without any limitation
 		query.max_parts = 1000;
 		query.part_number_marker = None;
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(
 			info,
@@ -1357,7 +1357,5 @@ mod tests {
 				},
 			]
 		);
-
-		Ok(())
 	}
 }

src/garage/tracing_setup.rs

@@ -5,6 +5,7 @@ mod telemetry {
 	use garage_util::data::Uuid;
 	use garage_util::error::Error;
 
+	#[expect(clippy::unnecessary_wraps)]
 	pub fn init_tracing(_: &str, _: Uuid) -> Result<(), Error> {
 		error!("Garage was built without OTLP exporter, admin.trace_sink is ignored.");
 		Ok(())

src/rpc/layout/test.rs

@@ -2,7 +2,6 @@ use std::cmp::min;
 use std::collections::HashMap;
 
 use garage_util::crdt::Crdt;
-use garage_util::error::*;
 
 use crate::layout::*;
 use crate::replication_mode::ReplicationFactor;
@@ -21,14 +20,14 @@ use crate::replication_mode::ReplicationFactor;
 // number of tokens by zone : (A, 4), (B,1), (C,4), (D, 4), (E, 2)
 // With these parameters, the naive algo fails, whereas there is a solution:
 // (A,A,C,D,E) , (A,B,C,D,D) (A,C,C,D,E)
-fn check_against_naive(cl: &LayoutVersion) -> Result<bool, Error> {
+fn check_against_naive(cl: &LayoutVersion) -> bool {
 	let over_size = cl.partition_size + 1;
 	let mut zone_token = HashMap::<String, usize>::new();
 
-	let (zones, zone_to_id) = cl.generate_nongateway_zone_ids()?;
+	let (zones, zone_to_id) = cl.generate_nongateway_zone_ids();
 
 	if zones.is_empty() {
-		return Ok(false);
+		return false;
 	}
 
 	for z in zones.iter() {
@@ -66,7 +65,7 @@ fn check_against_naive(cl: &LayoutVersion) -> Result<bool, Error> {
 			{
 				curr_zone += 1;
 				if curr_zone >= zones.len() {
-					return Ok(true);
+					return true;
 				}
 			}
 			id_zone_token[curr_zone] -= 1;
@@ -77,7 +76,7 @@ fn check_against_naive(cl: &LayoutVersion) -> Result<bool, Error> {
 		}
 	}
 
-	Ok(false)
+	false
 }
 
 fn show_msg(msg: &Message) {
@@ -127,7 +126,7 @@ fn test_assignment() {
 	let (mut cl, msg) = cl.apply_staged_changes(v + 1).unwrap();
 	show_msg(&msg);
 	assert_eq!(cl.check(), Ok(()));
-	assert!(check_against_naive(cl.current()).unwrap());
+	assert!(check_against_naive(cl.current()));
 
 	node_capacity_vec = vec![4000, 1000, 1000, 3000, 1000, 1000, 2000, 10000, 2000];
 	node_zone_vec = vec!["A", "B", "C", "C", "C", "B", "G", "H", "I"];
@@ -136,7 +135,7 @@ fn test_assignment() {
 	let (mut cl, msg) = cl.apply_staged_changes(v + 1).unwrap();
 	show_msg(&msg);
 	assert_eq!(cl.check(), Ok(()));
-	assert!(check_against_naive(cl.current()).unwrap());
+	assert!(check_against_naive(cl.current()));
 
 	node_capacity_vec = vec![4000, 1000, 2000, 7000, 1000, 1000, 2000, 10000, 2000];
 	update_layout(&mut cl, &node_capacity_vec, &node_zone_vec, 3);
@@ -144,7 +143,7 @@ fn test_assignment() {
 	let (mut cl, msg) = cl.apply_staged_changes(v + 1).unwrap();
 	show_msg(&msg);
 	assert_eq!(cl.check(), Ok(()));
-	assert!(check_against_naive(cl.current()).unwrap());
+	assert!(check_against_naive(cl.current()));
 
 	node_capacity_vec = vec![
 		4000000, 4000000, 2000000, 7000000, 1000000, 9000000, 2000000, 10000, 2000000,
@@ -154,5 +153,5 @@ fn test_assignment() {
 	let (cl, msg) = cl.apply_staged_changes(v + 1).unwrap();
 	show_msg(&msg);
 	assert_eq!(cl.check(), Ok(()));
-	assert!(check_against_naive(cl.current()).unwrap());
+	assert!(check_against_naive(cl.current()));
 }

src/rpc/layout/version.rs

@@ -271,7 +271,7 @@ impl LayoutVersion {
 		// Check that the partition size stored is the one computed by the asignation
 		// algorithm.
 		let cl2 = self.clone();
-		let (_, zone_to_id) = cl2.generate_nongateway_zone_ids().unwrap();
+		let (_, zone_to_id) = cl2.generate_nongateway_zone_ids();
 		match cl2.compute_optimal_partition_size(&zone_to_id, zone_redundancy) {
 			Ok(s) if s != self.partition_size => {
 				return Err(format!(
@@ -330,7 +330,7 @@ impl LayoutVersion {
 
 		// We generate for once numerical ids for the zones of non gateway nodes,
 		// to use them as indices in the flow graphs.
-		let (id_to_zone, zone_to_id) = self.generate_nongateway_zone_ids()?;
+		let (id_to_zone, zone_to_id) = self.generate_nongateway_zone_ids();
 
 		if self.nongateway_nodes().len() < self.replication_factor {
 			return Err(Error::Message(format!(
@@ -489,9 +489,7 @@ impl LayoutVersion {
 
 	/// This function generates ids for the zone of the nodes appearing in
 	/// `self.node_id_vec`.
-	pub(crate) fn generate_nongateway_zone_ids(
-		&self,
-	) -> Result<(Vec<String>, HashMap<String, usize>), Error> {
+	pub(crate) fn generate_nongateway_zone_ids(&self) -> (Vec<String>, HashMap<String, usize>) {
 		let mut id_to_zone = Vec::<String>::new();
 		let mut zone_to_id = HashMap::<String, usize>::new();
 
@@ -502,7 +500,7 @@ impl LayoutVersion {
 				id_to_zone.push(r.zone.clone());
 			}
 		}
-		Ok((id_to_zone, zone_to_id))
+		(id_to_zone, zone_to_id)
 	}
 
 	/// This function computes by dichotomy the largest realizable partition size, given

src/util/config.rs

@@ -305,6 +305,7 @@ fn default_consistency_mode() -> String {
 	"consistent".into()
 }
 
+#[expect(clippy::unnecessary_wraps)]
 fn default_compression() -> Option<i32> {
 	Some(1)
 }