Hammond-data: switch database module to use Failure.

hammond-downloader/Cargo.toml

@@ -12,6 +12,8 @@ mime_guess = "1.8.3"
 reqwest = "0.8.4"
 tempdir = "0.3.5"
 glob = "0.2.11"
+failure = "0.1.1"
+failure_derive = "0.1.1"
 
 [dependencies.hammond-data]
 path = "../hammond-data"

hammond-downloader/src/downloader.rs

@@ -15,6 +15,8 @@ use errors::*;
 use hammond_data::{EpisodeWidgetQuery, PodcastCoverQuery, Save};
 use hammond_data::xdg_dirs::HAMMOND_CACHE;
 
+// use failure::Error;
+
 // TODO: Replace path that are of type &str with std::path.
 // TODO: Have a convention/document absolute/relative paths, if they should end with / or not.
 

hammond-downloader/src/errors.rs

@@ -9,3 +9,12 @@ error_chain! {
         DataError(hammond_data::errors::Error);
     }
 }
+
+#[derive(Fail, Debug)]
+enum DownloaderError {
+    #[fail(display = "Reqwest error: {}", _0)] RequestError(reqwest::Error),
+    // NOT SYNC.
+    // #[fail(display = "Data error: {}", _0)]
+    // DataError(hammond_data::errors::Error),
+    #[fail(display = "Io error: {}", _0)] IoError(io::Error),
+}

hammond-downloader/src/lib.rs

@@ -1,13 +1,17 @@
 #![recursion_limit = "1024"]
-#![deny(unused_extern_crates, unused)]
+// #![deny(unused_extern_crates, unused)]
 
 #[macro_use]
 extern crate error_chain;
+#[macro_use]
+extern crate failure_derive;
+#[macro_use]
+extern crate log;
+
+extern crate failure;
 extern crate glob;
 extern crate hammond_data;
 extern crate hyper;
-#[macro_use]
-extern crate log;
 extern crate mime_guess;
 extern crate reqwest;
 extern crate tempdir;