chore: replace retry crate with backon

Cargo.toml

@@ -27,6 +27,9 @@ strip = true
 anyhow = { version = "1.0", features = ["backtrace"] }
 ar = "0.9"
 async-trait = "0.1"
+backon = { version = "1", default-features = false, features = [
+  "std-blocking-sleep",
+] }
 base64 = "0.21"
 bincode = "1"
 blake3 = "1"
@@ -78,7 +81,6 @@ reqwest = { version = "0.12", features = [
   "rustls-tls-native-roots",
   "trust-dns",
 ], optional = true }
-retry = "2"
 semver = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"

src/client.rs

@@ -16,8 +16,8 @@ use crate::errors::*;
 use crate::net::Connection;
 use crate::protocol::{Request, Response};
 use crate::util;
+use backon::BlockingRetryable;
 use byteorder::{BigEndian, ByteOrder};
-use retry::{delay::Fixed, retry};
 use std::io::{self, BufReader, BufWriter, Read};
 
 /// A connection to an sccache server.
@@ -79,7 +79,10 @@ pub fn connect_with_retry(addr: &crate::net::SocketAddr) -> io::Result<ServerCon
     //   if the process exited.
     // * Send a pipe handle to the server process so it can notify
     //   us once it starts the server instead of us polling.
-    match retry(Fixed::from_millis(500).take(10), || connect_to_server(addr)) {
+    let backoff = backon::ConstantBuilder::default()
+        .with_delay(std::time::Duration::from_millis(500))
+        .with_max_times(10);
+    match (|| connect_to_server(addr)).retry(backoff).call() {
         Ok(conn) => Ok(conn),
         Err(e) => Err(io::Error::new(
             io::ErrorKind::TimedOut,