refactor: use async for concurrency

Normal tokio async tasks for collecting metadata, blocking tasks for
computing checksums, so that all available CPU can be used for that.

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index e0403c4..444263f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,8 +13,10 @@ edition = "2018"
 [dependencies]
 anyhow = "1"
 digest = "0.9"
+num_cpus = "1"
 serde = { version = "1", features = ["derive"] }
 serde_yaml = "0.8"
 sha2 = "0.9"
 structopt = "0.3"
+tokio = { version = "1", features = ["full"] }
 unix_mode = "0.1"