clippy: Implement defaults

ofborg/build.rs

@@ -430,7 +430,7 @@ pub enum Event {
     // Create a struct to hold all the possible metrics
     f.write_all(
         b"
-#[derive(Debug, Clone)]
+#[derive(Default, Debug, Clone)]
 pub struct MetricCollector {
 ",
     )
@@ -457,32 +457,12 @@ pub struct MetricCollector {
     // Create a struct to hold all the possible metrics
     f.write_all(
         b"
+
 impl MetricCollector {
   pub fn new() -> MetricCollector {
-    MetricCollector {
-",
-    )
-    .unwrap();
+    Default::default()
+  }
 
-    let variants: Vec<String> = events()
-        .iter()
-        .map(|mtype| {
-            let mut fields: Vec<String> = mtype.enum_field_types();
-            fields.push("String".to_owned()); // Instance
-
-            format!(
-                "      {}: Arc::new(Mutex::new(HashMap::new()))",
-                &mtype.metric_name(),
-            )
-        })
-        .collect();
-
-    f.write_all(variants.join(",\n").as_bytes()).unwrap();
-    f.write_all("\n    }\n".as_bytes()).unwrap();
-    f.write_all("\n  }\n".as_bytes()).unwrap();
-
-    f.write_all(
-        b"
   pub fn record(&self, instance: String, event: Event) {
     match event {
 ",

ofborg/src/notifyworker.rs

@@ -25,13 +25,14 @@ pub trait NotificationReceiver {
     fn tell(&mut self, action: Action);
 }
 
+#[derive(Default)]
 pub struct DummyNotificationReceiver {
     pub actions: Vec<Action>,
 }
 
 impl DummyNotificationReceiver {
     pub fn new() -> DummyNotificationReceiver {
-        DummyNotificationReceiver { actions: vec![] }
+        Default::default()
     }
 }
 

ofborg/src/tagger.rs

@@ -7,8 +7,8 @@ pub struct StdenvTagger {
     selected: Vec<String>,
 }
 
-impl StdenvTagger {
-    pub fn new() -> StdenvTagger {
+impl Default for StdenvTagger {
+    fn default() -> StdenvTagger {
         let mut t = StdenvTagger {
             possible: vec![
                 String::from("10.rebuild-linux-stdenv"),
@@ -20,6 +20,12 @@ impl StdenvTagger {
 
         t
     }
+}
+
+impl StdenvTagger {
+    pub fn new() -> StdenvTagger {
+        Default::default()
+    }
 
     pub fn changed(&mut self, systems: Vec<tasks::eval::stdenvs::System>) {
         for system in systems {
@@ -63,8 +69,8 @@ pub struct PkgsAddedRemovedTagger {
     selected: Vec<String>,
 }
 
-impl PkgsAddedRemovedTagger {
-    pub fn new() -> PkgsAddedRemovedTagger {
+impl Default for PkgsAddedRemovedTagger {
+    fn default() -> PkgsAddedRemovedTagger {
         let mut t = PkgsAddedRemovedTagger {
             possible: vec![
                 String::from("8.has: package (new)"),
@@ -76,6 +82,12 @@ impl PkgsAddedRemovedTagger {
 
         t
     }
+}
+
+impl PkgsAddedRemovedTagger {
+    pub fn new() -> PkgsAddedRemovedTagger {
+        Default::default()
+    }
 
     pub fn changed(&mut self, removed: &[PackageArch], added: &[PackageArch]) {
         if !removed.is_empty() {
@@ -102,8 +114,8 @@ pub struct RebuildTagger {
     selected: Vec<String>,
 }
 
-impl RebuildTagger {
-    pub fn new() -> RebuildTagger {
+impl Default for RebuildTagger {
+    fn default() -> RebuildTagger {
         let mut t = RebuildTagger {
             possible: vec![
                 String::from("10.rebuild-linux: 501+"),
@@ -123,6 +135,12 @@ impl RebuildTagger {
 
         t
     }
+}
+
+impl RebuildTagger {
+    pub fn new() -> RebuildTagger {
+        Default::default()
+    }
 
     pub fn parse_attrs(&mut self, attrs: Vec<PackageArch>) {
         let mut counter_darwin = 0;