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authorJoey Hess2014-03-30 19:10:32 -0400
committerJoey Hess2014-03-30 19:10:32 -0400
commit61d8214d9d8cea6ba047d1a26f9edc1ea180234b (patch)
tree1e9f0184af88eed1dd5974bf2f47b0765c23b321 /Types.hs
parent4e442f4bcf04a68f638393d180ac7664ddd0fe4b (diff)
propellor spin
Diffstat (limited to 'Types.hs')
-rw-r--r--Types.hs22
1 files changed, 22 insertions, 0 deletions
diff --git a/Types.hs b/Types.hs
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+module Types where
+
+type HostName = String
+type UserName = String
+
+data Property = Property
+ { propertyDesc :: Desc
+ -- must be idempotent; may run repeatedly
+ , propertySatisfy :: IO Result
+ }
+
+type Desc = String
+
+data Result = NoChange | MadeChange | FailedChange
+ deriving (Show, Eq)
+
+combineResult :: Result -> Result -> Result
+combineResult FailedChange _ = FailedChange
+combineResult _ FailedChange = FailedChange
+combineResult MadeChange _ = MadeChange
+combineResult _ MadeChange = MadeChange
+combineResult NoChange NoChange = NoChange