77 lines
2.8 KiB
Haskell
77 lines
2.8 KiB
Haskell
{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE GeneralizedNewtypeDeriving #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Nix where
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import Control.Monad.Fix
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import Control.Monad.IO.Class
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import Control.Monad.Reader (MonadReader)
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import Control.Monad.Trans.Reader
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import qualified Data.HashMap.Lazy as M
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import Nix.Builtins
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import Nix.Eval
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import Nix.Expr.Types.Annotated (NExprLoc, stripAnnotation)
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import Nix.Lint
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import Nix.Monad
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import Nix.Monad.Instance
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import Nix.Scope
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import Nix.Utils
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-- | Evaluate a nix expression in the default context
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evalTopLevelExpr :: MonadBuiltins e m
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=> Maybe FilePath -> NExprLoc -> m (NValueNF m)
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evalTopLevelExpr mdir expr = do
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base <- baseEnv
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(normalForm =<<) $ pushScopes base $ case mdir of
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Nothing -> contextualExprEval expr
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Just dir -> do
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traceM $ "Setting __cwd = " ++ show dir
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ref <- valueThunk $ NVLiteralPath dir
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pushScope (M.singleton "__cwd" ref) (contextualExprEval expr)
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evalTopLevelExprIO :: Maybe FilePath -> NExprLoc -> IO (NValueNF (Lazy IO))
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evalTopLevelExprIO mdir = runLazyIO . evalTopLevelExpr mdir
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-- informativeEvalTopLevelExprIO :: Maybe FilePath -> NExpr
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-- -> IO (NValueNF (Lazy IO))
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-- informativeEvalTopLevelExprIO mdir expr =
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-- runReaderT (runLazy (evalTopLevelExpr mdir expr)) []
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tracingEvalTopLevelExprIO :: Maybe FilePath -> NExprLoc
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-> IO (NValueNF (Lazy IO))
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tracingEvalTopLevelExprIO mdir expr = do
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traced <- tracingExprEval expr
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case mdir of
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Nothing ->
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runLazyIO (normalForm =<< (`pushScopes` traced) =<< baseEnv)
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Just dir -> do
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traceM $ "Setting __cwd = " ++ show dir
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ref <- runLazyIO (valueThunk $ NVLiteralPath dir)
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let m = M.singleton "__cwd" ref
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runLazyIO (baseEnv >>= (`pushScopes` pushScope m traced)
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>>= normalForm)
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newtype Lint m a = Lint
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{ runLint :: ReaderT (Context (Symbolic (Lint m))) m a }
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deriving (Functor, Applicative, Monad, MonadFix, MonadIO,
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MonadReader (Context (Symbolic (Lint m))))
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runLintIO :: Lint IO a -> IO a
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runLintIO = flip runReaderT (Context emptyScopes []) . runLint
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symbolicBaseEnv :: Monad m => m (Scopes (Symbolic m))
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symbolicBaseEnv = return [Scope M.empty False]
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lintExprIO :: NExprLoc -> IO (Symbolic (Lint IO))
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lintExprIO expr =
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runLintIO (symbolicBaseEnv
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>>= (`pushScopes` lintExpr (stripAnnotation expr)))
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tracingLintExprIO :: NExprLoc -> IO (Symbolic (Lint IO))
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tracingLintExprIO expr = do
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traced <- tracingExprLint expr
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ref <- runLintIO $ mkSymbolic [TPath]
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let m = M.singleton "__cwd" ref
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runLintIO (symbolicBaseEnv >>= (`pushScopes` pushScope m traced))
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