154 lines
2.8 KiB
Haskell
154 lines
2.8 KiB
Haskell
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE RecordWildCards #-}
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module Licensor
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( LiLicense(..)
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, LiPackage(..)
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, getDependencies
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, getPackage
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, orderPackagesByLicense
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)
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where
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-- base
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import Data.Monoid ((<>))
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import System.IO
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-- Cabal
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import Distribution.License
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import Distribution.Package
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import Distribution.PackageDescription
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import Distribution.PackageDescription.Parse
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import Distribution.Simple.Utils
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import Distribution.Text
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import Distribution.Verbosity
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-- containers
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import Data.Map.Strict (Map)
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import qualified Data.Map.Strict as Map
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import Data.Set (Set)
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import qualified Data.Set as Set
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-- directory
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import System.Directory
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-- HTTP
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import Network.HTTP
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( getRequest
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, getResponseBody
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, simpleHTTP
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)
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-- process
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import System.Process
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-- |
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--
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--
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newtype LiLicense = LiLicense { getLicense :: License }
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deriving (Eq, Read, Show, Text)
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-- |
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--
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--
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instance Ord LiLicense where
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compare =
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comparing display
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-- |
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--
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--
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data LiPackage =
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LiPackage
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{ liPackageId :: PackageIdentifier
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, liPackageDependencies :: Set LiPackage
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, liPackageLicense :: License
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}
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-- |
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--
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--
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getPackage :: IO (Maybe PackageDescription)
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getPackage = do
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currentDirectory <- getCurrentDirectory
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fmap getPackageDescription <$> findPackageDesc currentDirectory
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>>= either (const (return Nothing)) (fmap Just)
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-- |
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--
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--
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getPackageDescription :: FilePath -> IO PackageDescription
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getPackageDescription =
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fmap packageDescription . readPackageDescription silent
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-- |
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--
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--
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getDependencies :: IO (Maybe (Set PackageIdentifier))
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getDependencies =
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fmap Set.fromList . sequence . fmap simpleParse . lines
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<$> readProcess "stack" ["list-dependencies", "--separator", "-"] ""
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-- |
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--
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--
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getPackageLicense :: PackageIdentifier -> IO LiLicense
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getPackageLicense p@PackageIdentifier{..} = do
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let
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url =
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"http://hackage.haskell.org/package/"
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<> display p
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<> "/"
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<> unPackageName pkgName
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<> ".cabal"
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pd <- simpleHTTP (getRequest url) >>= getResponseBody
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(file, handle) <- openTempFile "/tmp" "licensor"
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hClose handle
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writeFile file pd
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PackageDescription{license} <- getPackageDescription file
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hClose handle
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removeFile file
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return (LiLicense license)
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-- |
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--
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--
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orderPackagesByLicense
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:: PackageIdentifier
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-> Set PackageIdentifier
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-> IO (Map LiLicense (Set PackageIdentifier))
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orderPackagesByLicense p =
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let
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insertPackage package orderedPackages' = do
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license <- getPackageLicense package
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orderedPackages <- orderedPackages'
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return $
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if p == package
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then
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orderedPackages
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else
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Map.insertWith
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Set.union
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license
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(Set.singleton package)
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orderedPackages
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in
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foldr insertPackage (pure mempty)
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