ghcup-hs/lib/GHCup/Errors.hs

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{-# OPTIONS_GHC -Wno-orphans #-}
{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE ExistentialQuantification #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE FlexibleInstances #-}
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{-|
Module : GHCup.Errors
Description : GHCup error types
Copyright : (c) Julian Ospald, 2020
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License : LGPL-3.0
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Maintainer : hasufell@hasufell.de
Stability : experimental
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Portability : portable
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-}
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module GHCup.Errors where
import GHCup.Types
import Codec.Archive
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import Control.Exception.Safe
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import Data.ByteString ( ByteString )
import Data.CaseInsensitive ( CI )
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import Data.Text ( Text )
import Data.Versions
import Haskus.Utils.Variant
import Text.PrettyPrint hiding ( (<>) )
import Text.PrettyPrint.HughesPJClass hiding ( (<>) )
import URI.ByteString
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import qualified Data.Map.Strict as M
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import qualified Data.Text as T
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------------------------
--[ Low-level errors ]--
------------------------
-- | A compatible platform could not be found.
data NoCompatiblePlatform = NoCompatiblePlatform String -- the platform we got
deriving Show
instance Pretty NoCompatiblePlatform where
pPrint (NoCompatiblePlatform str') =
text ("Could not find a compatible platform. Got: " ++ str')
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-- | Unable to find a download for the requested versio/distro.
data NoDownload = NoDownload
deriving Show
instance Pretty NoDownload where
pPrint NoDownload =
text "Unable to find a download for the requested version/distro."
-- | No update available or necessary.
data NoUpdate = NoUpdate
deriving Show
instance Pretty NoUpdate where
pPrint NoUpdate = text "No update available or necessary."
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-- | The Architecture is unknown and unsupported.
data NoCompatibleArch = NoCompatibleArch String
deriving Show
instance Pretty NoCompatibleArch where
pPrint (NoCompatibleArch arch) =
text ("The Architecture is unknown or unsupported. Got: " ++ arch)
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-- | Unable to figure out the distribution of the host.
data DistroNotFound = DistroNotFound
deriving Show
instance Pretty DistroNotFound where
pPrint DistroNotFound =
text "Unable to figure out the distribution of the host."
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-- | The archive format is unknown. We don't know how to extract it.
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data UnknownArchive = UnknownArchive FilePath
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deriving Show
instance Pretty UnknownArchive where
pPrint (UnknownArchive file) =
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text $ "The archive format is unknown. We don't know how to extract the file " <> file
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-- | The scheme is not supported (such as ftp).
data UnsupportedScheme = UnsupportedScheme
deriving Show
instance Pretty UnsupportedScheme where
pPrint UnsupportedScheme = text "The scheme is not supported (such as ftp)."
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-- | Unable to copy a file.
data CopyError = CopyError String
deriving Show
instance Pretty CopyError where
pPrint (CopyError reason) =
text ("Unable to copy a file. Reason was: " ++ reason)
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-- | Unable to find a tag of a tool.
data TagNotFound = TagNotFound Tag Tool
deriving Show
instance Pretty TagNotFound where
pPrint (TagNotFound tag tool) =
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text "Unable to find tag" <+> pPrint tag <+> text "of tool" <+> pPrint tool
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-- | Unable to find the next version of a tool (the one after the currently
-- set one).
data NextVerNotFound = NextVerNotFound Tool
deriving Show
instance Pretty NextVerNotFound where
pPrint (NextVerNotFound tool) =
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text "Unable to find next (the one after the currently set one) version of tool" <+> pPrint tool
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-- | The tool (such as GHC) is already installed with that version.
data AlreadyInstalled = AlreadyInstalled Tool Version
deriving Show
instance Pretty AlreadyInstalled where
pPrint (AlreadyInstalled tool ver') =
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pPrint tool <+> text "-" <+> pPrint ver' <+> text "is already installed"
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-- | The Directory is supposed to be empty, but wasn't.
data DirNotEmpty = DirNotEmpty {path :: FilePath}
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instance Pretty DirNotEmpty where
pPrint (DirNotEmpty path) = do
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text $ "The directory was expected to be empty, but isn't: " <> path
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-- | The tool is not installed. Some operations rely on a tool
-- to be installed (such as setting the current GHC version).
data NotInstalled = NotInstalled Tool GHCTargetVersion
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deriving Show
instance Pretty NotInstalled where
pPrint (NotInstalled tool ver) =
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text "The version" <+> pPrint ver <+> text "of the tool" <+> pPrint tool <+> text "is not installed."
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-- | An executable was expected to be in PATH, but was not found.
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data NotFoundInPATH = NotFoundInPATH FilePath
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deriving Show
instance Pretty NotFoundInPATH where
pPrint (NotFoundInPATH exe) =
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text $ "The exe " <> exe <> " was not found in PATH."
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-- | JSON decoding failed.
data JSONError = JSONDecodeError String
deriving Show
instance Pretty JSONError where
pPrint (JSONDecodeError err) =
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text $ "JSON decoding failed with: " <> err
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-- | A file that is supposed to exist does not exist
-- (e.g. when we use file scheme to "download" something).
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data FileDoesNotExistError = FileDoesNotExistError FilePath
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deriving Show
instance Pretty FileDoesNotExistError where
pPrint (FileDoesNotExistError file) =
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text $ "File " <> file <> " does not exist."
-- | The file already exists
-- (e.g. when we use isolated installs with the same path).
-- (e.g. This is done to prevent any overwriting)
data FileAlreadyExistsError = FileAlreadyExistsError FilePath
deriving Show
instance Pretty FileAlreadyExistsError where
pPrint (FileAlreadyExistsError file) =
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text $ "File " <> file <> " Already exists."
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data TarDirDoesNotExist = TarDirDoesNotExist TarDir
deriving Show
instance Pretty TarDirDoesNotExist where
pPrint (TarDirDoesNotExist dir) =
text "Tar directory does not exist:" <+> pPrint dir
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-- | File digest verification failed.
data DigestError = DigestError Text Text
deriving Show
instance Pretty DigestError where
pPrint (DigestError currentDigest expectedDigest) =
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text "Digest error: expected" <+> text (T.unpack expectedDigest) <+> text "but got" <+> pPrint currentDigest
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-- | Unexpected HTTP status.
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data HTTPStatusError = HTTPStatusError Int (M.Map (CI ByteString) ByteString)
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deriving Show
instance Pretty HTTPStatusError where
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pPrint (HTTPStatusError status _) =
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text "Unexpected HTTP status:" <+> pPrint status
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-- | Malformed headers.
data MalformedHeaders = MalformedHeaders Text
deriving Show
instance Pretty MalformedHeaders where
pPrint (MalformedHeaders h) =
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text "Headers are malformed: " <+> pPrint h
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-- | Unexpected HTTP status.
data HTTPNotModified = HTTPNotModified Text
deriving Show
instance Pretty HTTPNotModified where
pPrint (HTTPNotModified etag) =
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text "Remote resource not modifed, etag was:" <+> pPrint etag
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-- | The 'Location' header was expected during a 3xx redirect, but not found.
data NoLocationHeader = NoLocationHeader
deriving Show
instance Pretty NoLocationHeader where
pPrint NoLocationHeader =
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text "The 'Location' header was expected during a 3xx redirect, but not found."
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-- | Too many redirects.
data TooManyRedirs = TooManyRedirs
deriving Show
instance Pretty TooManyRedirs where
pPrint TooManyRedirs =
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text "Too many redirections."
-- | A patch could not be applied.
data PatchFailed = PatchFailed
deriving Show
instance Pretty PatchFailed where
pPrint PatchFailed =
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text "A patch could not be applied."
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-- | The tool requirements could not be found.
data NoToolRequirements = NoToolRequirements
deriving Show
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instance Pretty NoToolRequirements where
pPrint NoToolRequirements =
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text "The Tool requirements could not be found."
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data InvalidBuildConfig = InvalidBuildConfig Text
deriving Show
instance Pretty InvalidBuildConfig where
pPrint (InvalidBuildConfig reason) =
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text "The build config is invalid. Reason was:" <+> pPrint reason
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data NoToolVersionSet = NoToolVersionSet Tool
deriving Show
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instance Pretty NoToolVersionSet where
pPrint (NoToolVersionSet tool) =
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text "No version is set for tool" <+> pPrint tool <+> text "."
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data NoNetwork = NoNetwork
deriving Show
instance Pretty NoNetwork where
pPrint NoNetwork =
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text "A download was required or requested, but '--offline' was specified."
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data HadrianNotFound = HadrianNotFound
deriving Show
instance Pretty HadrianNotFound where
pPrint HadrianNotFound =
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text "Could not find Hadrian build files. Does this GHC version support Hadrian builds?"
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-------------------------
--[ High-level errors ]--
-------------------------
-- | A download failed. The underlying error is encapsulated.
data DownloadFailed = forall x xs . (Show x, Show (V xs), Pretty x, Pretty (V xs)) => DownloadFailed (V (x ': xs))
instance Pretty DownloadFailed where
pPrint (DownloadFailed reason) =
text "Download failed:" <+> pPrint reason
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deriving instance Show DownloadFailed
-- | A build failed.
data BuildFailed = forall es . (Pretty (V es), Show (V es)) => BuildFailed FilePath (V es)
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instance Pretty BuildFailed where
pPrint (BuildFailed path reason) =
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text "BuildFailed failed in dir" <+> text (path <> ":") <+> pPrint reason
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deriving instance Show BuildFailed
-- | Setting the current GHC version failed.
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data GHCupSetError = forall es . (Show (V es), Pretty (V es)) => GHCupSetError (V es)
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instance Pretty GHCupSetError where
pPrint (GHCupSetError reason) =
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text "Setting the current GHC version failed:" <+> pPrint reason
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deriving instance Show GHCupSetError
---------------------------------------------
--[ True Exceptions (e.g. for MonadThrow) ]--
---------------------------------------------
-- | Parsing failed.
data ParseError = ParseError String
deriving Show
instance Pretty ParseError where
pPrint (ParseError reason) =
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text "Parsing failed:" <+> pPrint reason
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instance Exception ParseError
data UnexpectedListLength = UnexpectedListLength String
deriving Show
instance Pretty UnexpectedListLength where
pPrint (UnexpectedListLength reason) =
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text "List length unexpected:" <+> pPrint reason
instance Exception UnexpectedListLength
data NoUrlBase = NoUrlBase Text
deriving Show
instance Pretty NoUrlBase where
pPrint (NoUrlBase url) =
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text "Couldn't get a base filename from url" <+> pPrint url
instance Exception NoUrlBase
------------------------
--[ orphan instances ]--
------------------------
instance Pretty (V '[]) where
{-# INLINABLE pPrint #-}
pPrint _ = undefined
instance
( Pretty x
, Pretty (V xs)
) => Pretty (V (x ': xs))
where
pPrint v = case popVariantHead v of
Right x -> pPrint x
Left xs -> pPrint xs
instance Pretty URIParseError where
pPrint (MalformedScheme reason) =
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text "Failed to parse URI. Malformed scheme:" <+> text (show reason)
pPrint MalformedUserInfo =
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text "Failed to parse URI. Malformed user info."
pPrint MalformedQuery =
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text "Failed to parse URI. Malformed query."
pPrint MalformedFragment =
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text "Failed to parse URI. Malformed fragment."
pPrint MalformedHost =
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text "Failed to parse URI. Malformed host."
pPrint MalformedPort =
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text "Failed to parse URI. Malformed port."
pPrint MalformedPath =
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text "Failed to parse URI. Malformed path."
pPrint (OtherError err) =
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text "Failed to parse URI:" <+> pPrint err
instance Pretty ArchiveResult where
pPrint ArchiveFatal = text "Archive result: fatal"
pPrint ArchiveFailed = text "Archive result: failed"
pPrint ArchiveWarn = text "Archive result: warning"
pPrint ArchiveRetry = text "Archive result: retry"
pPrint ArchiveOk = text "Archive result: Ok"
pPrint ArchiveEOF = text "Archive result: EOF"
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instance Pretty T.Text where
pPrint = text . T.unpack