drop dependency on once-cell

Cargo.lock

@@ -888,7 +888,6 @@ dependencies = [
  "lru-cache",
  "nix",
  "num_cpus",
- "once_cell",
  "opentelemetry",
  "opentelemetry-jaeger-propagator",
  "opentelemetry-otlp",

Cargo.toml

@@ -105,7 +105,6 @@ image = { version = "0.25.2", default-features = false, features = ["jpeg", "png
 jsonwebtoken = "9.3.0"
 lru-cache = "0.1.2"
 num_cpus = "1.16.0"
-once_cell = "1.19.0"
 opentelemetry = "0.24.0"
 opentelemetry-jaeger-propagator = "0.3.0"
 opentelemetry-otlp = "0.17.0"

src/config.rs

@@ -4,9 +4,9 @@ use std::{
     fmt::{self, Display},
     net::{IpAddr, Ipv4Addr},
     path::{Path, PathBuf},
+    sync::LazyLock,
 };
 
-use once_cell::sync::Lazy;
 use reqwest::Url;
 use ruma::{
     api::federation::discovery::OldVerifyKey, OwnedServerName,
@@ -24,8 +24,8 @@ pub(crate) use env_filter_clone::EnvFilterClone;
 use proxy::ProxyConfig;
 
 /// The default configuration file path
-pub(crate) static DEFAULT_PATH: Lazy<PathBuf> =
-    Lazy::new(|| [env!("CARGO_PKG_NAME"), "config.toml"].iter().collect());
+pub(crate) static DEFAULT_PATH: LazyLock<PathBuf> =
+    LazyLock::new(|| [env!("CARGO_PKG_NAME"), "config.toml"].iter().collect());
 
 #[allow(clippy::struct_excessive_bools)]
 #[derive(Debug, Deserialize)]

src/observability.rs

@@ -1,7 +1,12 @@
 //! Facilities for observing runtime behavior
 #![warn(missing_docs, clippy::missing_docs_in_private_items)]
 
-use std::{collections::HashSet, fs::File, io::BufWriter, sync::Arc};
+use std::{
+    collections::HashSet,
+    fs::File,
+    io::BufWriter,
+    sync::{Arc, LazyLock},
+};
 
 use axum::{
     extract::{MatchedPath, Request},
@@ -9,7 +14,6 @@ use axum::{
     response::Response,
 };
 use http::Method;
-use once_cell::sync::Lazy;
 use opentelemetry::{metrics::MeterProvider, trace::TracerProvider, KeyValue};
 use opentelemetry_otlp::WithExportConfig;
 use opentelemetry_sdk::{
@@ -34,7 +38,7 @@ use crate::{
 };
 
 /// Globally accessible metrics state
-pub(crate) static METRICS: Lazy<Metrics> = Lazy::new(Metrics::new);
+pub(crate) static METRICS: LazyLock<Metrics> = LazyLock::new(Metrics::new);
 
 /// Cleans up resources relating to observability when [`Drop`]ped
 pub(crate) struct Guard {
@@ -385,8 +389,8 @@ impl Metrics {
 /// Track HTTP metrics by converting this into an [`axum`] layer
 pub(crate) async fn http_metrics_layer(req: Request, next: Next) -> Response {
     /// Routes that should not be included in the metrics
-    static IGNORED_ROUTES: Lazy<HashSet<(&Method, &str)>> =
-        Lazy::new(|| [(&Method::GET, "/metrics")].into_iter().collect());
+    static IGNORED_ROUTES: LazyLock<HashSet<(&Method, &str)>> =
+        LazyLock::new(|| [(&Method::GET, "/metrics")].into_iter().collect());
 
     let matched_path =
         req.extensions().get::<MatchedPath>().map(|x| x.as_str().to_owned());