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diff --git a/src/Propellor/Types/Chroot.hs b/src/Propellor/Types/Chroot.hs
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+module Propellor.Types.Chroot where
+
+import Data.Monoid
+import qualified Data.Map as M
+
+data ChrootInfo host = ChrootInfo
+ { _chroots :: M.Map FilePath host
+ , _chrootCfg :: ChrootCfg
+ }
+ deriving (Show)
+
+instance Monoid (ChrootInfo host) where
+ mempty = ChrootInfo mempty mempty
+ mappend old new = ChrootInfo
+ { _chroots = M.union (_chroots old) (_chroots new)
+ , _chrootCfg = _chrootCfg old <> _chrootCfg new
+ }
+
+data ChrootCfg
+ = NoChrootCfg
+ | SystemdNspawnCfg [(String, Bool)]
+ deriving (Show)
+
+instance Monoid ChrootCfg where
+ mempty = NoChrootCfg
+ mappend v NoChrootCfg = v
+ mappend NoChrootCfg v = v
+ mappend (SystemdNspawnCfg l1) (SystemdNspawnCfg l2) =
+ SystemdNspawnCfg (l1 <> l2)