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module Hadrian.Target (Target, target, context, builder, inputs, outputs) where
import Development.Shake.Classes
import GHC.Generics
-- | Each invocation of a builder is fully described by a 'Target', which
-- comprises a build context (type variable @c@), a builder (type variable @b@),
-- a list of input files and a list of output files. For example:
--
-- @
-- preludeTarget = Target (GHC.Context) (GHC.Builder)
-- { context = Context Stage1 base profiling
-- , builder = Ghc Stage1
-- , inputs = ["libraries/base/Prelude.hs"]
-- , outputs = ["build/stage1/libraries/base/Prelude.p_o"] }
-- @
data Target c b = Target
{ context :: c -- ^ Current build context
, builder :: b -- ^ Builder to be invoked
, inputs :: [FilePath] -- ^ Input files for the builder
, outputs :: [FilePath] -- ^ Files to be produced
} deriving (Eq, Generic, Show)
target :: c -> b -> [FilePath] -> [FilePath] -> Target c b
target = Target
instance (Binary c, Binary b) => Binary (Target c b)
instance (Hashable c, Hashable b) => Hashable (Target c b)
instance (NFData c, NFData b) => NFData (Target c b)
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