2021-10-15 20:24:23 +00:00
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE DuplicateRecordFields #-}
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{-# LANGUAGE RankNTypes #-}
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module GHCup.OptParse.Config where
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import GHCup.Errors
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import GHCup.Types
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import GHCup.Utils
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import GHCup.Utils.Prelude
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import GHCup.Utils.Logger
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import GHCup.Utils.String.QQ
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#if !MIN_VERSION_base(4,13,0)
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import Control.Monad.Fail ( MonadFail )
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#endif
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import Control.Monad.Reader
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import Control.Monad.Trans.Resource
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import Data.Bifunctor
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import Data.Functor
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import Data.Maybe
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import Haskus.Utils.Variant.Excepts
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import Options.Applicative hiding ( style )
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import Options.Applicative.Help.Pretty ( text )
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import Prelude hiding ( appendFile )
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import System.Exit
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import qualified Data.Text as T
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import qualified Data.ByteString.UTF8 as UTF8
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import qualified Data.YAML.Aeson as Y
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import Control.Exception.Safe (MonadMask)
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----------------
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--[ Commands ]--
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----------------
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data ConfigCommand
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= ShowConfig
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| SetConfig String (Maybe String)
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| InitConfig
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---------------
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--[ Parsers ]--
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---------------
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configP :: Parser ConfigCommand
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configP = subparser
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( command "init" initP
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<> command "set" setP -- [set] KEY VALUE at help lhs
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<> command "show" showP
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)
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<|> argsP -- add show for a single option
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<|> pure ShowConfig
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where
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initP = info (pure InitConfig) (progDesc "Write default config to ~/.ghcup/config.yaml")
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showP = info (pure ShowConfig) (progDesc "Show current config (default)")
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setP = info argsP (progDesc "Set config KEY to VALUE (or specify as single json value)" <> footerDoc (Just $ text configSetFooter))
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argsP = SetConfig <$> argument str (metavar "<JSON_VALUE | YAML_KEY>") <*> optional (argument str (metavar "YAML_VALUE"))
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--------------
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--[ Footer ]--
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--------------
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configFooter :: String
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configFooter = [s|Examples:
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# show current config
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ghcup config
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# initialize config
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ghcup config init
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# set <key> <value> configuration pair
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ghcup config set <key> <value>|]
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configSetFooter :: String
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configSetFooter = [s|Examples:
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# disable caching
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ghcup config set cache false
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# switch downloader to wget
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ghcup config set downloader Wget
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# set mirror for ghcup metadata
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ghcup config set '{url-source: { OwnSource: "<url>"}}'|]
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-----------------
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--[ Utilities ]--
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-----------------
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formatConfig :: UserSettings -> String
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formatConfig = UTF8.toString . Y.encode1Strict
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updateSettings :: Monad m => UTF8.ByteString -> Settings -> Excepts '[JSONError] m Settings
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updateSettings config' settings = do
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settings' <- lE' JSONDecodeError . first snd . Y.decode1Strict $ config'
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pure $ mergeConf settings' settings
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where
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mergeConf :: UserSettings -> Settings -> Settings
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mergeConf UserSettings{..} Settings{..} =
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let cache' = fromMaybe cache uCache
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noVerify' = fromMaybe noVerify uNoVerify
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keepDirs' = fromMaybe keepDirs uKeepDirs
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downloader' = fromMaybe downloader uDownloader
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verbose' = fromMaybe verbose uVerbose
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urlSource' = fromMaybe urlSource uUrlSource
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noNetwork' = fromMaybe noNetwork uNoNetwork
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gpgSetting' = fromMaybe gpgSetting uGPGSetting
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in Settings cache' noVerify' keepDirs' downloader' verbose' urlSource' noNetwork' gpgSetting' noColor
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------------------
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--[ Entrypoint ]--
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------------------
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config :: ( Monad m
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, MonadMask m
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, MonadUnliftIO m
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, MonadFail m
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)
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=> ConfigCommand
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-> Settings
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-> KeyBindings
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-> (ReaderT LeanAppState m () -> m ())
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-> m ExitCode
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config configCommand settings keybindings runLogger = case configCommand of
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InitConfig -> do
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path <- getConfigFilePath
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liftIO $ writeFile path $ formatConfig $ fromSettings settings (Just keybindings)
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runLogger $ logDebug $ "config.yaml initialized at " <> T.pack path
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pure ExitSuccess
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ShowConfig -> do
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liftIO $ putStrLn $ formatConfig $ fromSettings settings (Just keybindings)
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pure ExitSuccess
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(SetConfig k (Just v)) ->
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case v of
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"" -> do
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runLogger $ logError "Empty values are not allowed"
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pure $ ExitFailure 55
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_ -> doConfig (k <> ": " <> v <> "\n")
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(SetConfig json Nothing) -> doConfig json
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where
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doConfig val = do
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r <- runE @'[JSONError] $ do
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settings' <- updateSettings (UTF8.fromString val) settings
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path <- liftIO getConfigFilePath
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liftIO $ writeFile path $ formatConfig $ fromSettings settings' (Just keybindings)
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lift $ runLogger $ logDebug $ T.pack $ show settings'
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pure ()
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case r of
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VRight _ -> pure ExitSuccess
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VLeft (V (JSONDecodeError e)) -> do
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runLogger $ logError $ "Error decoding config: " <> T.pack e
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pure $ ExitFailure 65
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VLeft _ -> pure $ ExitFailure 65
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