1 files changed, 36 insertions, 0 deletions
diff --git a/Propellor/Types/Attr.hs b/Propellor/Types/Attr.hs
new file mode 100644
index 00000000..c253e32b
--- /dev/null
+++ b/Propellor/Types/Attr.hs
@@ -0,0 +1,36 @@
+module Propellor.Types.Attr where
+
+import qualified Data.Set as S
+
+-- | The attributes of a host. For example, its hostname.
+data Attr = Attr
+	{ _hostname :: HostName
+	, _cnames :: S.Set Domain
+
+	, _dockerImage :: Maybe String
+	, _dockerRunParams :: [HostName -> String]
+	}
+
+instance Eq Attr where
+	x == y = and
+		[ _hostname x == _hostname y
+		, _cnames x == _cnames y
+
+		, _dockerImage x == _dockerImage y
+		, let simpl v = map (\a -> a "") (_dockerRunParams v)
+		  in simpl x == simpl y
+		]
+
+instance Show Attr where
+	show a = unlines
+		[ "hostname " ++ _hostname a
+		, "cnames " ++ show (_cnames a)
+		, "docker image " ++ show (_dockerImage a)
+		, "docker run params " ++ show (map (\mk -> mk "") (_dockerRunParams a))
+		]
+
+newAttr :: HostName -> Attr
+newAttr hn = Attr hn S.empty Nothing []
+
+type HostName = String
+type Domain = String