Merge pull request #17 from mulkieran/issue_project_698

Use once_cell instead of lazy_static for lazy statics

Cargo.toml

@@ -28,7 +28,7 @@ bindgen = { version = "0.69.0", default-features = false, features = ["runtime"]
 [dev-dependencies]
 glob = "0.3.0"
 gpt = "3.0.0"
-lazy_static = "1.4.0"
+once_cell = "1.19.0"
 serde = { version = "1.0.130", features = ["derive"] }
 serde_json = "1.0.68"
 tempfile = "3.2.0"

tests/util/mod.rs

@@ -1,4 +1,5 @@
 use libc::fallocate;
+use once_cell::sync::Lazy;
 use serde::{Deserialize, Deserializer};
 use std::{
     fs::OpenOptions,
@@ -13,9 +14,7 @@ use tempfile::{NamedTempFile, TempPath};
 
 // All tests use the same loopback device interface and so can tread on each others toes leading to
 // racy tests. So we need to lock all tests to ensure only one runs at a time.
-lazy_static::lazy_static! {
-    static ref LOCK: Arc<Mutex<()>> = Arc::new(Mutex::new(()));
-}
+static LOCK: Lazy<Arc<Mutex<()>>> = Lazy::new(|| Arc::new(Mutex::new(())));
 
 pub fn create_backing_file(size: i64) -> TempPath {
     let file = NamedTempFile::new().expect("should be able to create a temp file");