feat(backend/opendal): add opt-in per-part write progress via ProgressLayer + chunked writer PR Description

.gitignore

@@ -5,6 +5,8 @@ mutants.out
 cargo-test*
 coverage/*lcov
 .testscompletions-*
+.env
+.idea/
 
 # Generated by Cargo
 # Use in library crates

README.md

@@ -120,8 +120,8 @@ fn main() -> Result<(), Box<dyn Error>> {
         .to_snapshot()?;
 
     // Create snapshot
-    let snap = repo.backup(&backup_opts, &source, snap)?;
-
+    let cancel = std::sync::Arc::new(std::sync::atomic::AtomicBool::new(false));  
+    let snap = repo.backup(&backup_opts, &source, snap, &cancel)?;
     println!("successfully created snapshot:\n{snap:#?}");
     Ok(())
 }

crates/backend/Cargo.toml

@@ -101,6 +101,7 @@ opendal = { version = "0.57.0", features = ["blocking", "services-b2", "services
 anyhow = { workspace = true }
 rstest = { workspace = true }
 toml = "1.0.3"
+dotenvy = "0.15.7"
 
 [lints]
 workspace = true

crates/backend/src/lib.rs

@@ -65,6 +65,10 @@ pub mod util;
 #[cfg(feature = "opendal")]
 pub mod opendal;
 
+/// Progress counting layer for the `OpenDAL` backend.
+#[cfg(feature = "opendal")]
+mod progress_layer;
+
 /// `Rclone` backend for Rustic.
 #[cfg(feature = "rclone")]
 pub mod rclone;