refactor: have per-module error enums

This means that a function that parses step bindings can't return an
error that the document is missing a title. Such an error return would
be nonsensical, and we use the Rust type system to prevent it, at a
small cost of being a bit verbose.

Additional benefit is that the library portion of Obnam doesn't return
anyhow::Result values anymore.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bin/obnam.rs b/src/bin/obnam.rs
index e9f30ca..4e38e1a 100644
--- a/src/bin/obnam.rs
+++ b/src/bin/obnam.rs
@@ -34,7 +34,7 @@ fn main() -> anyhow::Result<()> {
     if let Err(ref e) = result {
         error!("{}", e);
         eprintln!("ERROR: {}", e);
-        return result;
+        result?
     }
 
     info!("client ends successfully");