Add 'hadrian/' from commit '45f3bff7016a2a0cd9a5455a882ced984655e90b'

git-subtree-dir: hadrian
git-subtree-mainline: 575b35f4cdc18045bccd42d341d6f25d95c0696c
git-subtree-split: 45f3bff7016a2a0cd9a5455a882ced984655e90b

1 files changed, 66 insertions, 0 deletions

diff --git a/hadrian/src/Settings.hs b/hadrian/src/Settings.hs
new file mode 100755
index 0000000000..3497f43a1e
--- /dev/null
+++ b/hadrian/src/Settings.hs
@@ -0,0 +1,66 @@
+module Settings (
+    getArgs, getLibraryWays, getRtsWays, flavour, knownPackages,
+    findPackageByName, isLibrary, stagePackages, programContext,
+    getIntegerPackage
+    ) where
+
+import CommandLine
+import Expression
+import Flavour
+import Packages
+import UserSettings
+
+import {-# SOURCE #-} Settings.Default
+import Settings.Flavours.Development
+import Settings.Flavours.Performance
+import Settings.Flavours.Profiled
+import Settings.Flavours.Quick
+import Settings.Flavours.Quickest
+import Settings.Flavours.QuickCross
+
+getArgs :: Args
+getArgs = expr flavour >>= args
+
+getLibraryWays :: Ways
+getLibraryWays = expr flavour >>= libraryWays
+
+getRtsWays :: Ways
+getRtsWays = expr flavour >>= rtsWays
+
+stagePackages :: Stage -> Action [Package]
+stagePackages stage = do
+    f <- flavour
+    packages f stage
+
+hadrianFlavours :: [Flavour]
+hadrianFlavours =
+    [ defaultFlavour, developmentFlavour Stage1, developmentFlavour Stage2
+    , performanceFlavour, profiledFlavour, quickFlavour, quickestFlavour
+    , quickCrossFlavour ]
+
+flavour :: Action Flavour
+flavour = do
+    flavourName <- fromMaybe "default" <$> cmdFlavour
+    let unknownFlavour = error $ "Unknown build flavour: " ++ flavourName
+        flavours       = hadrianFlavours ++ userFlavours
+    return $ fromMaybe unknownFlavour $ find ((== flavourName) . name) flavours
+
+getIntegerPackage :: Expr Package
+getIntegerPackage = expr (integerLibrary =<< flavour)
+
+programContext :: Stage -> Package -> Action Context
+programContext stage pkg = do
+    profiled <- ghcProfiled <$> flavour
+    return $ if pkg == ghc && profiled && stage > Stage0
+             then Context stage pkg profiling
+             else vanillaContext stage pkg
+
+-- TODO: switch to Set Package as the order of packages should not matter?
+-- Otherwise we have to keep remembering to sort packages from time to time.
+knownPackages :: [Package]
+knownPackages = sort $ ghcPackages ++ userPackages
+
+-- TODO: Speed up? Switch to Set?
+-- Note: this is slow but we keep it simple as there are just ~50 packages
+findPackageByName :: PackageName -> Maybe Package
+findPackageByName name = find (\pkg -> pkgName pkg == name) knownPackages