Merge pull request #874 from sam-berning/tokio-flush

tough: flush file explicitly in cache

Author: sam-berning

tough/src/cache.rs

@@ -218,6 +218,11 @@ impl Repository {
             .await
             .context(error::TransportSnafu { url })?;
         file.write_all(&root_file_data)
+            .await
+            .context(error::CacheFileWriteSnafu {
+                path: outpath.clone(),
+            })?;
+        file.flush()
             .await
             .context(error::CacheFileWriteSnafu { path: outpath })
     }