Merge branch 'joeyconfig'

1 files changed, 62 insertions, 0 deletions

diff --git a/src/Propellor/Container.hs b/src/Propellor/Container.hs
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+{-# LANGUAGE DataKinds, TypeFamilies #-}
+
+module Propellor.Container where
+
+import Propellor.Types
+import Propellor.Types.Core
+import Propellor.Types.MetaTypes
+import Propellor.Types.Info
+import Propellor.Info
+import Propellor.PrivData
+import Propellor.PropAccum
+
+class IsContainer c where
+	containerProperties :: c -> [ChildProperty]
+	containerInfo :: c -> Info
+	setContainerProperties :: c -> [ChildProperty] -> c
+
+instance IsContainer Host where
+	containerProperties = hostProperties
+	containerInfo = hostInfo
+	setContainerProperties h ps = host (hostName h) (Props ps)
+
+-- | Note that the metatype of a container's properties is not retained,
+-- so this defaults to UnixLike. So, using this with setContainerProps can
+-- add properties to a container that conflict with properties already in it.
+-- Use caution when using this; only add properties that do not have
+-- restricted targets.
+containerProps :: IsContainer c => c -> Props UnixLike
+containerProps = Props . containerProperties
+
+setContainerProps :: IsContainer c => c -> Props metatypes -> c
+setContainerProps c (Props ps) = setContainerProperties c ps
+
+-- | Adjust the provided Property, adding to its
+-- propertyChidren the properties of the provided container.
+-- 
+-- The Info of the propertyChildren is adjusted to only include 
+-- info that should be propagated out to the Property.
+--
+-- Any PrivInfo that uses HostContext is adjusted to use the name
+-- of the container as its context.
+propagateContainer
+	::
+		-- Since the children being added probably have info,
+		-- require the Property's metatypes to have info.
+		( IncludesInfo metatypes ~ 'True
+		, IsContainer c
+		)
+	=> String
+	-> c
+	-> Property metatypes
+	-> Property metatypes
+propagateContainer containername c prop = prop
+	`addChildren` map convert (containerProperties c)
+  where
+	convert p = 
+		let n = property (getDesc p) (getSatisfy p) :: Property UnixLike
+		    n' = n
+		    	`setInfoProperty` mapInfo (forceHostContext containername)
+				(propagatableInfo (getInfo p))
+		   	`addChildren` map convert (getChildren p)
+		in toChildProperty n'