{-# LANGUAGE CPP #-}

{-# LANGUAGE ConstraintKinds #-}

{-# LANGUAGE DeriveDataTypeable #-}

{-# LANGUAGE DeriveGeneric #-}

{-# LANGUAGE FlexibleContexts #-}

{-# LANGUAGE OverloadedStrings #-}

{-# LANGUAGE ScopedTypeVariables #-}

{-# LANGUAGE TemplateHaskell #-}

{-# LANGUAGE TupleSections #-}

{-# LANGUAGE ViewPatterns #-}

-- | Build the project.

module Stack.Build

(build

,withLoadPackage

,mkBaseConfigOpts

,queryBuildInfo)

where

import Control.Monad

import Control.Monad.Catch (MonadCatch, MonadMask)

import Control.Monad.IO.Class

import Control.Monad.Logger

import Control.Monad.Reader (MonadReader, asks)

import Control.Monad.Trans.Resource

import Data.Aeson (Value (Object, Array), (.=), object)

import Data.Function

import qualified Data.HashMap.Strict as HM

import Data.IORef.RunOnce (runOnce)

import Data.List ((\\))

import Data.List.Extra (groupSort)

import Data.List.NonEmpty (NonEmpty(..))

import qualified Data.List.NonEmpty as NE

import qualified Data.Map as Map

import Data.Map.Strict (Map)

import Data.Monoid

import Data.Set (Set)

import qualified Data.Set as Set

import Data.Text (Text)

import qualified Data.Text as T

import Data.Text.Encoding (decodeUtf8)

import qualified Data.Text.IO as TIO

import Data.Text.Read (decimal)

import qualified Data.Vector as V

import qualified Data.Yaml as Yaml

import Network.HTTP.Client.Conduit (HasHttpManager)

import Path

import Prelude hiding (FilePath, writeFile)

import Stack.Build.ConstructPlan

import Stack.Build.Execute

import Stack.Build.Haddock

import Stack.Build.Installed

import Stack.Build.Source

import Stack.Build.Target

import Stack.Fetch as Fetch

import Stack.GhcPkg

import Stack.Package

import Stack.Types

import Stack.Types.Internal

import System.FileLock (FileLock, unlockFile)

#ifdef WINDOWS

import System.Win32.Console (setConsoleCP, setConsoleOutputCP, getConsoleCP, getConsoleOutputCP)

import qualified Control.Monad.Catch as Catch

#endif

type M env m = (MonadIO m,MonadReader env m,HasHttpManager env,HasBuildConfig env,MonadLogger m,MonadBaseControl IO m,MonadCatch m,MonadMask m,HasLogLevel env,HasEnvConfig env,HasTerminal env)

-- | Build.

--

-- If a buildLock is passed there is an important contract here. That lock must

-- protect the snapshot, and it must be safe to unlock it if there are no further

-- modifications to the snapshot to be performed by this build.

build :: M env m

=> (Set (Path Abs File) -> IO ()) -- ^ callback after discovering all local files

-> Maybe FileLock

-> BuildOpts

-> m ()

build setLocalFiles mbuildLk bopts = fixCodePage $ do

menv <- getMinimalEnvOverride

(_, mbp, locals, extraToBuild, sourceMap) <- loadSourceMap NeedTargets bopts

-- Set local files, necessary for file watching

stackYaml <- asks $ bcStackYaml . getBuildConfig

liftIO $ setLocalFiles

$ Set.insert stackYaml

$ Set.unions

$ map lpFiles locals

(installedMap, globalDumpPkgs, snapshotDumpPkgs, localDumpPkgs) <-

getInstalled menv

GetInstalledOpts

{ getInstalledProfiling = profiling

, getInstalledHaddock = shouldHaddockDeps bopts }

sourceMap

baseConfigOpts <- mkBaseConfigOpts bopts

plan <- withLoadPackage menv $ \loadPackage ->

constructPlan mbp baseConfigOpts locals extraToBuild localDumpPkgs loadPackage sourceMap installedMap

-- If our work to do is all local, let someone else have a turn with the snapshot.

-- They won't damage what's already in there.

case (mbuildLk, allLocal plan) of

-- NOTE: This policy is too conservative. In the future we should be able to

-- schedule unlocking as an Action that happens after all non-local actions are

-- complete.

(Just lk,True) -> do $logDebug "All installs are local; releasing snapshot lock early."

liftIO $ unlockFile lk

_ -> return ()

warnIfExecutablesWithSameNameCouldBeOverwritten locals plan

when (boptsPreFetch bopts) $

preFetch plan

if boptsDryrun bopts

then printPlan plan

else executePlan menv bopts baseConfigOpts locals

globalDumpPkgs

snapshotDumpPkgs

localDumpPkgs

installedMap

plan

where

profiling = boptsLibProfile bopts || boptsExeProfile bopts

-- | If all the tasks are local, they don't mutate anything outside of our local directory.

allLocal :: Plan -> Bool

allLocal =

all (== Local) .

map taskLocation .

Map.elems .

planTasks

-- | See https://github.com/commercialhaskell/stack/issues/1198.

warnIfExecutablesWithSameNameCouldBeOverwritten

:: MonadLogger m => [LocalPackage] -> Plan -> m ()

warnIfExecutablesWithSameNameCouldBeOverwritten locals plan =

forM_ (Map.toList warnings) $ \(exe,(toBuild,otherLocals)) -> do

let exe_s

| length toBuild > 1 = "several executables with the same name:"

| otherwise = "executable"

exesText pkgs =

T.intercalate

", "

["'" <> packageNameText p <> ":" <> exe <> "'" | p <- pkgs]

($logWarn . T.unlines . concat)

[ [ "Building " <> exe_s <> " " <> exesText toBuild <> "." ]

, [ "Only one of them will be available via 'stack exec' or locally installed."

| length toBuild > 1

]

, [ "Other executables with the same name might be overwritten: " <>

exesText otherLocals <> "."

| not (null otherLocals)

]

]

where

-- Cases of several local packages having executables with the same name.

-- The Map entries have the following form:

--

-- executable name: ( package names for executables that are being built

-- , package names for other local packages that have an

-- executable with the same name

-- )

warnings :: Map Text ([PackageName],[PackageName])

warnings =

Map.mapMaybe

(\(pkgsToBuild,localPkgs) ->

case (pkgsToBuild,NE.toList localPkgs \\ NE.toList pkgsToBuild) of

(_ :| [],[]) ->

-- We want to build the executable of single local package

-- and there are no other local packages with an executable of

-- the same name. Nothing to warn about, ignore.

Nothing

(_,otherLocals) ->

-- We could be here for two reasons (or their combination):

-- 1) We are building two or more executables with the same

-- name that will end up overwriting each other.

-- 2) In addition to the executable(s) that we want to build

-- there are other local packages with an executable of the

-- same name that might get overwritten.

-- Both cases warrant a warning.

Just (NE.toList pkgsToBuild,otherLocals))

(Map.intersectionWith (,) exesToBuild localExes)

exesToBuild :: Map Text (NonEmpty PackageName)

exesToBuild =

collect

[ (exe,pkgName)

| (pkgName,task) <- Map.toList (planTasks plan)

, isLocal task

, exe <- (Set.toList . exeComponents . lpComponents . taskLP) task

]

where

isLocal Task{taskType = (TTLocal _)} = True

isLocal _ = False

taskLP Task{taskType = (TTLocal lp)} = lp

taskLP _ = error "warnIfExecutablesWithSameNameCouldBeOverwritten/taskLP: task isn't local"

localExes :: Map Text (NonEmpty PackageName)

localExes =

collect

[ (exe,packageName pkg)

| pkg <- map lpPackage locals

, exe <- Set.toList (packageExes pkg)

]

collect :: Ord k => [(k,v)] -> Map k (NonEmpty v)

collect = Map.map NE.fromList . Map.fromDistinctAscList . groupSort

-- | Get the @BaseConfigOpts@ necessary for constructing configure options

mkBaseConfigOpts :: (MonadIO m, MonadReader env m, HasEnvConfig env, MonadThrow m)

=> BuildOpts -> m BaseConfigOpts

mkBaseConfigOpts bopts = do

snapDBPath <- packageDatabaseDeps

localDBPath <- packageDatabaseLocal

snapInstallRoot <- installationRootDeps

localInstallRoot <- installationRootLocal

packageExtraDBs <- packageDatabaseExtra

return BaseConfigOpts

{ bcoSnapDB = snapDBPath

, bcoLocalDB = localDBPath

, bcoSnapInstallRoot = snapInstallRoot

, bcoLocalInstallRoot = localInstallRoot

, bcoBuildOpts = bopts

, bcoExtraDBs = packageExtraDBs

}

-- | Provide a function for loading package information from the package index

withLoadPackage :: ( MonadIO m

, HasHttpManager env

, MonadReader env m

, MonadBaseControl IO m

, MonadCatch m

, MonadLogger m

, HasEnvConfig env)

=> EnvOverride

-> ((PackageName -> Version -> Map FlagName Bool -> IO Package) -> m a)

-> m a

withLoadPackage menv inner = do

econfig <- asks getEnvConfig

withCabalLoader' <- runOnce $ withCabalLoader menv $ \cabalLoader ->

inner $ \name version flags -> do

bs <- cabalLoader $ PackageIdentifier name version -- TODO automatically update index the first time this fails

-- Intentionally ignore warnings, as it's not really

-- appropriate to print a bunch of warnings out while

-- resolving the package index.

(_warnings,pkg) <- readPackageBS (depPackageConfig econfig flags) bs

return pkg

withCabalLoader'

where

-- | Package config to be used for dependencies

depPackageConfig :: EnvConfig -> Map FlagName Bool -> PackageConfig

depPackageConfig econfig flags = PackageConfig

{ packageConfigEnableTests = False

, packageConfigEnableBenchmarks = False

, packageConfigFlags = flags

, packageConfigCompilerVersion = envConfigCompilerVersion econfig

, packageConfigPlatform = configPlatform (getConfig econfig)

}

-- | Set the code page for this process as necessary. Only applies to Windows.

-- See: https://github.com/commercialhaskell/stack/issues/738

fixCodePage :: M env m => m a -> m a

#ifdef WINDOWS

fixCodePage inner = do

mcp <- asks $ configModifyCodePage . getConfig

ec <- asks getEnvConfig

if mcp && getGhcVersion (envConfigCompilerVersion ec) < $(mkVersion "7.10.3")

then fixCodePage'

-- GHC >=7.10.3 doesn't need this code page hack.

else inner

where

fixCodePage' = do

origCPI <- liftIO getConsoleCP

origCPO <- liftIO getConsoleOutputCP

let setInput = origCPI /= expected

setOutput = origCPO /= expected

fixInput

| setInput = Catch.bracket_

(liftIO $ do

setConsoleCP expected)

(liftIO $ setConsoleCP origCPI)

| otherwise = id

fixOutput

| setInput = Catch.bracket_

(liftIO $ do

setConsoleOutputCP expected)

(liftIO $ setConsoleOutputCP origCPO)

| otherwise = id

case (setInput, setOutput) of

(False, False) -> return ()

(True, True) -> warn ""

(True, False) -> warn " input"

(False, True) -> warn " output"

fixInput $ fixOutput inner

expected = 65001 -- UTF-8

warn typ = $logInfo $ T.concat

[ "Setting"

, typ

, " codepage to UTF-8 (65001) to ensure correct output from GHC"

]

#else

fixCodePage = id

#endif

-- | Query information about the build and print the result to stdout in YAML format.

queryBuildInfo :: M env m

=> [Text] -- ^ selectors

-> m ()

queryBuildInfo selectors0 =

rawBuildInfo

>>= select id selectors0

>>= liftIO . TIO.putStrLn . decodeUtf8 . Yaml.encode

where

select _ [] value = return value

select front (sel:sels) value =

case value of

Object o ->

case HM.lookup sel o of

Nothing -> err "Selector not found"

Just value' -> cont value'

Array v ->

case decimal sel of

Right (i, "")

| i >= 0 && i < V.length v -> cont $ v V.! i

| otherwise -> err "Index out of range"

_ -> err "Encountered array and needed numeric selector"

_ -> err $ "Cannot apply selector to " ++ show value

where

cont = select (front . (sel:)) sels

err msg = error $ msg ++ ": " ++ show (front [sel])

-- | Get the raw build information object

rawBuildInfo :: M env m => m Value

rawBuildInfo = do

(_, _mbp, locals, _extraToBuild, _sourceMap) <- loadSourceMap NeedTargets defaultBuildOpts

return $ object

[ "locals" .= Object (HM.fromList $ map localToPair locals)

]

where

localToPair lp =

(T.pack $ packageNameString $ packageName p, value)

where

p = lpPackage lp

value = object

[ "version" .= packageVersion p

, "path" .= toFilePath (lpDir lp)

]