fix panic when downloads-dir does not exist (#100)

src/config/model.rs

@@ -160,15 +160,12 @@ impl Config {
     }
 
     pub fn downloads_filepath(&self, account: &Account, filename: &str) -> PathBuf {
-        let temp_dir = env::temp_dir();
-        let mut full_path = account
+        account
             .downloads_dir
             .as_ref()
-            .unwrap_or(self.downloads_dir.as_ref().unwrap_or(&temp_dir))
-            .to_owned();
-
-        full_path.push(filename);
-        full_path
+            .unwrap_or(self.downloads_dir.as_ref().unwrap_or(&env::temp_dir()))
+            .to_owned()
+            .join(filename)
     }
 
     pub fn address(&self, account: &Account) -> String {

src/msg/cli.rs

@@ -258,24 +258,25 @@ pub fn msg_matches(matches: &ArgMatches) -> Result<()> {
     }
 
     if let Some(matches) = matches.subcommand_matches("attachments") {
-        debug!("Subcommand matched: attachments");
+        debug!("[msg::cli] subcommand matched: attachments");
 
         let mut imap_conn = ImapConnector::new(&account)?;
         let uid = matches.value_of("uid").unwrap();
-        debug!("UID: {}", &uid);
+        debug!("[msg::cli] uid: {}", &uid);
 
         let msg = imap_conn.read_msg(&mbox, &uid)?;
         let attachments = Attachments::from_bytes(&msg)?;
         debug!(
-            "{} attachment(s) found for message {}",
+            "[msg::cli] {} attachment(s) found for message {}",
             &attachments.0.len(),
             &uid
         );
-        attachments.0.iter().for_each(|attachment| {
+        for attachment in attachments.0.iter() {
             let filepath = config.downloads_filepath(&account, &attachment.filename);
-            debug!("Downloading {}…", &attachment.filename);
-            fs::write(filepath, &attachment.raw).unwrap()
-        });
+            debug!("[msg::cli] downloading {}…", &attachment.filename);
+            fs::write(&filepath, &attachment.raw)
+                .chain_err(|| format!("Could not save attachment {:?}", filepath))?;
+        }
         info!(&format!(
             "{} attachment(s) successfully downloaded",
             &attachments.0.len()