Rules.hs 2.84 KB
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module Rules (topLevelTargets, buildRules) where
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import Data.Foldable
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import Base
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import Context hiding (stage, package, way)
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import Expression
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import GHC
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import Rules.Compile
import Rules.Data
import Rules.Dependencies
import Rules.Documentation
import Rules.Generate
import Rules.Cabal
import Rules.Gmp
import Rules.Libffi
import Rules.Library
import Rules.Perl
import Rules.Program
import Rules.Register
import Rules.Setup
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import Settings
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allStages :: [Stage]
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allStages = [minBound ..]
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-- | 'need' all top-level build targets
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topLevelTargets :: Rules ()
topLevelTargets = do

    want $ Rules.Generate.installTargets

    -- TODO: do we want libffiLibrary to be a top-level target?

    action $ do -- TODO: Add support for all rtsWays
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        rtsLib    <- pkgLibraryFile Stage1 rts vanilla
        rtsThrLib <- pkgLibraryFile Stage1 rts threaded
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        need [ rtsLib, rtsThrLib ]

    for_ allStages $ \stage ->
        for_ (knownPackages \\ [rts, libffi]) $ \pkg -> action $ do
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            let context = vanillaContext stage pkg
            activePackages <- interpretInContext context getPackages
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            when (pkg `elem` activePackages) $
                if isLibrary pkg
                then do -- build a library
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                    ways <- interpretInContext context getLibraryWays
                    libs <- traverse (pkgLibraryFile stage pkg) ways
                    docs <- interpretInContext context buildHaddock
                    need $ libs ++ [ pkgHaddockFile pkg | docs && stage == Stage1 ]
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                else do -- otherwise build a program
                    need [ fromJust $ programPath stage pkg ] -- TODO: drop fromJust
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packageRules :: Rules ()
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packageRules = do
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    -- We cannot register multiple GHC packages in parallel. Also we cannot run
    -- GHC when the package database is being mutated by "ghc-pkg". This is a
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    -- classic concurrent read exclusive write (CREW) conflict.
    let maxConcurrentReaders = 1000
    packageDb <- newResource "package-db" maxConcurrentReaders
    let readPackageDb  = [(packageDb, 1)]
        writePackageDb = [(packageDb, maxConcurrentReaders)]

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    -- TODO: not all build rules make sense for all stage/package combinations
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    let contexts        = liftM3 Context        allStages knownPackages allWays
        vanillaContexts = liftM2 vanillaContext allStages knownPackages
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    for_ contexts $ mconcat
        [ compilePackage readPackageDb
        , buildPackageLibrary ]

    for_ vanillaContexts $ mconcat
        [ buildPackageData
        , buildPackageDependencies readPackageDb
        , buildPackageDocumentation
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        , buildPackageGhciLibrary
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        , generatePackageCode
        , buildProgram
        , registerPackage writePackageDb ]
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buildRules :: Rules ()
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buildRules = do
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    cabalRules
    generateRules
    copyRules
    gmpRules
    libffiRules
    perlScriptRules
    setupRules
    packageRules