{-# LANGUAGE DataKinds #-}
{-# LANGUAGE KindSignatures #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE UndecidableInstances #-}
module Propellor.EnsureProperty
( ensureProperty
, property'
, OuterMetaTypesWitness
, EnsurePropertyAllowed
) where
import Propellor.Types
import Propellor.Types.Core
import Propellor.Types.MetaTypes
import Propellor.Exception
import GHC.TypeLits
import GHC.Exts (Constraint)
import Data.Type.Bool
import Data.Monoid
import Prelude
ensureProperty
::
( EnsurePropertyAllowed inner outer)
=> OuterMetaTypesWitness outer
-> Property (MetaTypes inner)
-> Propellor Result
ensureProperty :: forall (inner :: [MetaType]) (outer :: [MetaType]).
EnsurePropertyAllowed inner outer =>
OuterMetaTypesWitness outer
-> Property (MetaTypes inner) -> Propellor Result
ensureProperty OuterMetaTypesWitness outer
_ = forall b a. b -> (a -> b) -> Maybe a -> b
maybe (forall (m :: * -> *) a. Monad m => a -> m a
return Result
NoChange) forall (m :: * -> *).
(MonadIO m, MonadCatch m) =>
m Result -> m Result
catchPropellor forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall p. IsProp p => p -> Maybe (Propellor Result)
getSatisfy
type family EnsurePropertyAllowed inner outer :: Constraint where
EnsurePropertyAllowed inner outer = 'True ~
((EnsurePropertyNoInfo inner)
&&
(EnsurePropertyTargetOSMatches inner outer))
type family EnsurePropertyNoInfo (l :: [a]) :: Bool where
EnsurePropertyNoInfo '[] = 'True
EnsurePropertyNoInfo (t ': ts) = If (Not (t `EqT` 'WithInfo))
(EnsurePropertyNoInfo ts)
(TypeError ('Text "Cannot use ensureProperty with a Property that HasInfo."))
type family EnsurePropertyTargetOSMatches inner outer where
EnsurePropertyTargetOSMatches inner outer =
If (Targets outer `IsSubset` Targets inner)
'True
(IfStuck (Targets outer)
(DelayError
('Text "ensureProperty outer Property type is not able to be inferred here."
':$$: 'Text "Consider adding a type annotation."
)
)
(DelayErrorFcf
('Text "ensureProperty inner Property is missing support for: "
':$$: PrettyPrintMetaTypes (Difference (Targets outer) (Targets inner))
)
)
)
property'
:: SingI metatypes
=> Desc
-> (OuterMetaTypesWitness metatypes -> Propellor Result)
-> Property (MetaTypes metatypes)
property' :: forall {k} (metatypes :: k).
SingI metatypes =>
Desc
-> (OuterMetaTypesWitness metatypes -> Propellor Result)
-> Property (MetaTypes metatypes)
property' Desc
d OuterMetaTypesWitness metatypes -> Propellor Result
a =
let p :: Property (Sing metatypes)
p = forall metatypes.
metatypes
-> Desc
-> Maybe (Propellor Result)
-> Info
-> [ChildProperty]
-> Property metatypes
Property forall {k} (t :: k). SingI t => Sing t
sing Desc
d (forall a. a -> Maybe a
Just (OuterMetaTypesWitness metatypes -> Propellor Result
a (forall {k} (l :: k).
Property (MetaTypes l) -> OuterMetaTypesWitness l
outerMetaTypesWitness Property (Sing metatypes)
p))) forall a. Monoid a => a
mempty forall a. Monoid a => a
mempty
in Property (Sing metatypes)
p
newtype OuterMetaTypesWitness metatypes = OuterMetaTypesWitness (MetaTypes metatypes)
outerMetaTypesWitness :: Property (MetaTypes l) -> OuterMetaTypesWitness l
outerMetaTypesWitness :: forall {k} (l :: k).
Property (MetaTypes l) -> OuterMetaTypesWitness l
outerMetaTypesWitness (Property MetaTypes l
metatypes Desc
_ Maybe (Propellor Result)
_ Info
_ [ChildProperty]
_) = forall {k} (metatypes :: k).
MetaTypes metatypes -> OuterMetaTypesWitness metatypes
OuterMetaTypesWitness MetaTypes l
metatypes