Basic BinaryCacheStore implementation using async Rust

nix-rust/src/lib.rs

@@ -1,6 +1,11 @@
+#![feature(await_macro, async_await)]
+
+mod binary_cache_store;
 mod error;
 mod foreign;
+mod store;
 mod tarfile;
+mod path_info;
 
 pub use error::Error;
 
@@ -30,3 +35,36 @@ pub extern "C" fn unpack_tarfile(
 ) -> CBox<Result<(), error::CppException>> {
     CBox::new(tarfile::unpack_tarfile(source, dest_dir).map_err(|err| err.into()))
 }
+
+#[no_mangle]
+pub extern "C" fn rust_test() {
+    use crate::store::Store;
+    use futures::future::{FutureExt, TryFutureExt};
+    use std::path::Path;
+
+    let fut = async move {
+        let store: Box<dyn Store> = Box::new(binary_cache_store::BinaryCacheStore::new(
+            "https://cache.nixos.org".to_string(),
+        ));
+
+        let path = store
+            .parse_store_path(&Path::new(
+                "/nix/store/7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3",
+            ))
+            .unwrap();
+
+        /*
+        let info = store.query_path_info(&path).await.unwrap();
+
+        eprintln!("INFO = {:?}", info);
+         */
+
+        let closure = store.compute_path_closure(vec![path].into_iter().collect()).await.unwrap();
+
+        eprintln!("CLOSURE = {:?}", closure.len());
+
+        Ok(())
+    };
+
+    tokio::run(fut.boxed().compat());
+}