From 116cbddf7a8dd70123257da48751dc0ec8f495f3 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Sat, 2 Nov 2019 18:24:24 +0100
Subject: [PATCH] system:  implement Display

---
 ofborg/src/commentparser.rs |  1 -
 ofborg/src/outpathdiff.rs   |  1 -
 ofborg/src/systems.rs       | 12 +++++++-----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/ofborg/src/commentparser.rs b/ofborg/src/commentparser.rs
index ea098e6..f7b8896 100644
--- a/ofborg/src/commentparser.rs
+++ b/ofborg/src/commentparser.rs
@@ -244,5 +244,4 @@ baz",
             parse("@ofborg build foo bar baz.Baz")
         );
     }
-
 }
diff --git a/ofborg/src/outpathdiff.rs b/ofborg/src/outpathdiff.rs
index b1f79af..668367c 100644
--- a/ofborg/src/outpathdiff.rs
+++ b/ofborg/src/outpathdiff.rs
@@ -191,5 +191,4 @@ gnome3.evolution_data_server.aarch64-linux                                 /nix/
         );
         assert_eq!(parse_lines(&mut Cursor::new(TEST_LINES)), expect);
     }
-
 }
diff --git a/ofborg/src/systems.rs b/ofborg/src/systems.rs
index 140f1bc..f296270 100644
--- a/ofborg/src/systems.rs
+++ b/ofborg/src/systems.rs
@@ -5,15 +5,17 @@ pub enum System {
     X8664Darwin,
 }
 
-impl System {
-    pub fn to_string(&self) -> String {
+impl std::fmt::Display for System {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
         match self {
-            System::X8664Linux => String::from("x86_64-linux"),
-            System::Aarch64Linux => String::from("aarch64-linux"),
-            System::X8664Darwin => String::from("x86_64-darwin"),
+            System::X8664Linux => write!(f, "x86_64-linux"),
+            System::Aarch64Linux => write!(f, "aarch64-linux"),
+            System::X8664Darwin => write!(f, "x86_64-darwin"),
         }
     }
+}
 
+impl System {
     pub fn as_build_destination(&self) -> (Option<String>, Option<String>) {
         (None, Some(format!("build-inputs-{}", self.to_string())))
     }