diff --git a/src/main.rs b/src/main.rs
index b1b81ae..60e7cd4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,8 +3,8 @@ use eyre::{eyre, OptionExt, WrapErr};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::convert::TryFrom;
-use std::{fmt,env};
 use std::time::{Duration, SystemTime};
+use std::{env, fmt};
 
 const RESTIC_ALARM_BUCKET: &str = "restic-alarm-state";
 const RESTIC_ALARM_STATE_FILE: &str = "state.toml";
@@ -18,23 +18,27 @@ struct SmtpConfig {
 
 impl SmtpConfig {
     fn mailer(&self) -> Result<lettre::SmtpTransport, lettre::transport::smtp::Error> {
-        use lettre::SmtpTransport;
         use lettre::transport::smtp::authentication::Credentials;
+        use lettre::SmtpTransport;
         Ok(SmtpTransport::relay(&self.address)?
-           .credentials(Credentials::new(
-               self.username.to_owned(),
-               self.password.to_owned(),
-           ))
-           .build())
+            .credentials(Credentials::new(
+                self.username.to_owned(),
+                self.password.to_owned(),
+            ))
+            .build())
     }
 
     async fn from_env() -> eyre::Result<SmtpConfig> {
         let address = env::var("SMTP_ADDRESS")?;
         let username = env::var("SMTP_USERNAME")?;
         let password = env::var("SMTP_PASSWORD")?;
-        let smtp = SmtpConfig { address, username, password };
-        if ! smtp.mailer()?.test_connection()? {
-            return Err(eyre!("Unable to contact the SMTP relay"))
+        let smtp = SmtpConfig {
+            address,
+            username,
+            password,
+        };
+        if !smtp.mailer()?.test_connection()? {
+            return Err(eyre!("Unable to contact the SMTP relay"));
         }
         Ok(smtp)
     }
@@ -277,7 +281,12 @@ struct RepoInfo {
 // (e.g. if it fails to parse).
 // So the error must not be propagated to the toplevel, which would abort the
 // alert for remaining repositories; it should instead just be reported/logged.
-async fn check_repo(smtp: &SmtpConfig, client: &s3::Client, state: &mut State, repo: &str) -> eyre::Result<RepoInfo> {
+async fn check_repo(
+    smtp: &SmtpConfig,
+    client: &s3::Client,
+    state: &mut State,
+    repo: &str,
+) -> eyre::Result<RepoInfo> {
     let config = read_repo_config(client, repo).await?;
     let alert_status = if let Some(inactivity) = repo_last_snapshot(client, repo).await? {
         let last_alert = state.last_alert(repo);