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, 2 insertions, 1 deletions

diff --git a/src/cmd/list.rs b/src/cmd/list.rs
index 8766e34..ce19a72 100644
--- a/src/cmd/list.rs
+++ b/src/cmd/list.rs
@@ -1,6 +1,7 @@
 use crate::client::{BackupClient, ClientConfig};
+use crate::error::ObnamError;
 
-pub fn list(config: &ClientConfig) -> anyhow::Result<()> {
+pub fn list(config: &ClientConfig) -> Result<(), ObnamError> {
     let client = BackupClient::new(&config.server_url)?;
 
     let generations = client.list_generations()?;