fix(sync): Added the feature flags for compilation without the async runtime. Fixes #64. (#65)

BREAKING CHANGE: this bumps the MSRV to 1.70.0

---------

Co-authored-by: Kat Marchán <kzm@zkat.tech>

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        rust: [1.67.0, stable]
+        rust: [1.70.0, stable]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:

src/content/read.rs

@@ -6,10 +6,8 @@ use std::pin::Pin;
 #[cfg(any(feature = "async-std", feature = "tokio"))]
 use std::task::{Context, Poll};
 
-#[cfg(feature = "async-std")]
-use futures::io::AsyncReadExt;
-#[cfg(feature = "tokio")]
-use tokio::io::AsyncReadExt;
+#[cfg(any(feature = "async-std", feature = "tokio"))]
+use crate::async_lib::AsyncReadExt;
 
 use ssri::{Algorithm, Integrity, IntegrityChecker};
 
@@ -162,6 +160,7 @@ pub fn reflink(cache: &Path, sri: &Integrity, to: &Path) -> Result<()> {
     reflink_unchecked(cache, sri, to)
 }
 
+#[cfg(any(feature = "async-std", feature = "tokio"))]
 pub async fn reflink_async(cache: &Path, sri: &Integrity, to: &Path) -> Result<()> {
     let mut reader = open_async(cache, sri.clone()).await?;
     let mut buf = [0u8; 1024 * 8];

src/get.rs

@@ -319,6 +319,7 @@ where
 ///     Ok(())
 /// }
 /// ```
+#[cfg(any(feature = "async-std", feature = "tokio"))]
 pub async fn reflink<P, K, Q>(cache: P, key: K, to: Q) -> Result<()>
 where
     P: AsRef<Path>,
@@ -355,6 +356,7 @@ where
 ///     Ok(())
 /// }
 /// ```
+#[cfg(any(feature = "async-std", feature = "tokio"))]
 pub async fn reflink_unchecked<P, K, Q>(cache: P, key: K, to: Q) -> Result<()>
 where
     P: AsRef<Path>,
@@ -391,6 +393,7 @@ where
 ///     Ok(())
 /// }
 /// ```
+#[cfg(any(feature = "async-std", feature = "tokio"))]
 pub async fn reflink_hash<P, Q>(cache: P, sri: &Integrity, to: Q) -> Result<()>
 where
     P: AsRef<Path>,

src/index.rs

@@ -414,6 +414,7 @@ impl RemoveOpts {
     }
 
     /// Removes an individual index metadata entry. The associated content will be left in the cache.
+    #[cfg(any(feature = "async-std", feature = "tokio"))]
     pub async fn remove<P, K>(self, cache: P, key: K) -> Result<()>
     where
         P: AsRef<Path>,

src/linkto.rs

@@ -1,5 +1,7 @@
 #[cfg(any(feature = "async-std", feature = "tokio"))]
 use crate::async_lib::AsyncRead;
+#[cfg(any(feature = "async-std", feature = "tokio"))]
+use crate::async_lib::AsyncReadExt;
 use crate::content::linkto;
 use crate::errors::{Error, IoErrorExt, Result};
 use crate::{index, WriteOpts};
@@ -11,11 +13,6 @@ use std::pin::Pin;
 #[cfg(any(feature = "async-std", feature = "tokio"))]
 use std::task::{Context as TaskContext, Poll};
 
-#[cfg(feature = "async-std")]
-use futures::io::AsyncReadExt;
-#[cfg(feature = "tokio")]
-use tokio::io::AsyncReadExt;
-
 const BUF_SIZE: usize = 16 * 1024;
 const PROBE_SIZE: usize = 8;