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Fix error messages and overhaul pretty printing

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Fixes #115
This commit is contained in:
Julian Ospald
2021-03-02 00:15:03 +01:00
parent 9da5998a5c
commit 8c87c9aeb7
10 changed files with 324 additions and 115 deletions
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14
lib/GHCup.hs
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@@ -525,7 +525,7 @@ setGHC ver sghc = do
let verBS = verToBS (_tvVersion ver)
ghcdir <- lift $ ghcupGHCDir ver
whenM (lift $ fmap not $ ghcInstalled ver) (throwE (NotInstalled GHC (ver ^. tvVersion % to prettyVer)))
whenM (lift $ fmap not $ ghcInstalled ver) (throwE (NotInstalled GHC ver))
-- symlink destination
AppState { dirs = Dirs {..} } <- lift ask
@@ -605,7 +605,7 @@ setCabal ver = do
whenM (liftIO $ fmap not $ doesFileExist (binDir </> targetFile))
$ throwE
$ NotInstalled Cabal (prettyVer ver)
$ NotInstalled Cabal (GHCTargetVersion Nothing ver)
let cabalbin = binDir </> [rel|cabal|]
@@ -647,7 +647,7 @@ setHLS ver = do
-- set haskell-language-server-<ghcver> symlinks
bins <- lift $ hlsServerBinaries ver
when (bins == []) $ throwE $ NotInstalled HLS (prettyVer ver)
when (bins == []) $ throwE $ NotInstalled HLS (GHCTargetVersion Nothing ver)
forM_ bins $ \f -> do
let destL = toFilePath f
@@ -929,7 +929,7 @@ rmGHCVer :: ( MonadReader AppState m
rmGHCVer ver = do
isSetGHC <- lift $ fmap (maybe False (== ver)) $ ghcSet (_tvTarget ver)
whenM (lift $ fmap not $ ghcInstalled ver) (throwE (NotInstalled GHC (ver ^. tvVersion % to prettyVer)))
whenM (lift $ fmap not $ ghcInstalled ver) (throwE (NotInstalled GHC ver))
dir <- lift $ ghcupGHCDir ver
-- this isn't atomic, order matters
@@ -970,7 +970,7 @@ rmCabalVer :: (MonadReader AppState m, MonadThrow m, MonadLogger m, MonadIO m, M
=> Version
-> Excepts '[NotInstalled] m ()
rmCabalVer ver = do
whenM (lift $ fmap not $ cabalInstalled ver) $ throwE (NotInstalled Cabal (prettyVer ver))
whenM (lift $ fmap not $ cabalInstalled ver) $ throwE (NotInstalled Cabal (GHCTargetVersion Nothing ver))
cSet <- lift $ cabalSet
@@ -993,7 +993,7 @@ rmHLSVer :: (MonadReader AppState m, MonadThrow m, MonadLogger m, MonadIO m, Mon
=> Version
-> Excepts '[NotInstalled] m ()
rmHLSVer ver = do
whenM (lift $ fmap not $ hlsInstalled ver) $ throwE (NotInstalled HLS (prettyVer ver))
whenM (lift $ fmap not $ hlsInstalled ver) $ throwE (NotInstalled HLS (GHCTargetVersion Nothing ver))
isHlsSet <- lift $ hlsSet
@@ -1240,7 +1240,7 @@ Stage1Only = YES|]
$ c
tarName <-
parseRel
[i|ghc-#{prettyTVer tver}-#{prettyPfReq pfreq}-#{cDigest}.tar#{takeExtension (toFilePath tar)}|]
[i|ghc-#{tVerToText tver}-#{pfReqToString pfreq}-#{cDigest}.tar#{takeExtension (toFilePath tar)}|]
let tarPath = cacheDir </> tarName
handleIO (throwE . CopyError . show) $ liftIO $ copyFile (workdir </> tar)
tarPath

186
lib/GHCup/Errors.hs
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@@ -1,7 +1,13 @@
{-# OPTIONS_GHC -Wno-orphans #-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE ExistentialQuantification #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleInstances #-}
{-|
Module : GHCup.Errors
@@ -15,13 +21,21 @@ Portability : POSIX
module GHCup.Errors where
import GHCup.Types
import GHCup.Utils.Prelude
#if !defined(TAR)
import Codec.Archive
#endif
import Control.Exception.Safe
import Data.ByteString ( ByteString )
import Data.String.Interpolate
import Data.Text ( Text )
import Data.Versions
import Haskus.Utils.Variant
import HPath
import Haskus.Utils.Variant
import Text.PrettyPrint
import Text.PrettyPrint.HughesPJClass
import URI.ByteString
@@ -35,109 +49,211 @@ import HPath
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')
-- | 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."
-- | 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)
-- | 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."
-- | The archive format is unknown. We don't know how to extract it.
data UnknownArchive = UnknownArchive ByteString
deriving Show
instance Pretty UnknownArchive where
pPrint (UnknownArchive file) =
text [i|The archive format is unknown. We don't know how to extract the file "#{decUTF8Safe file}"|]
-- | 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)."
-- | 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)
-- | Unable to find a tag of a tool.
data TagNotFound = TagNotFound Tag Tool
deriving Show
instance Pretty TagNotFound where
pPrint (TagNotFound tag tool) =
text "Unable to find tag" <+> pPrint tag <+> text [i|of tool "#{tool}"|]
-- | Unable to find a version of a tool.
data VerNotFound = VerNotFound Version Tool
deriving Show
instance Pretty VerNotFound where
pPrint (VerNotFound ver' tool) =
text [i|Unable to find version "#{prettyShow ver'}" of tool "#{tool}"|]
-- | 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) =
text [i|Unable to find next (the one after the currently set one) version of tool "#{tool}"|]
-- | 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') =
text [i|#{tool}-#{prettyShow ver'} is already installed|]
-- | 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 Text
data NotInstalled = NotInstalled Tool GHCTargetVersion
deriving Show
instance Pretty NotInstalled where
pPrint (NotInstalled tool ver) =
text [i|The version "#{prettyShow ver}" of the tool "#{tool}" is not installed.|]
-- | An executable was expected to be in PATH, but was not found.
data NotFoundInPATH = NotFoundInPATH (Path Rel)
deriving Show
instance Pretty NotFoundInPATH where
pPrint (NotFoundInPATH exe) =
text [i|The exe "#{decUTF8Safe . toFilePath $ exe}" was not found in PATH.|]
-- | JSON decoding failed.
data JSONError = JSONDecodeError String
deriving Show
instance Pretty JSONError where
pPrint (JSONDecodeError err) =
text [i|JSON decoding failed with: #{err}|]
-- | A file that is supposed to exist does not exist
-- (e.g. when we use file scheme to "download" something).
data FileDoesNotExistError = FileDoesNotExistError ByteString
deriving Show
instance Pretty FileDoesNotExistError where
pPrint (FileDoesNotExistError file) =
text [i|File "#{decUTF8Safe file}" does not exist.|]
data TarDirDoesNotExist = TarDirDoesNotExist TarDir
deriving Show
instance Pretty TarDirDoesNotExist where
pPrint (TarDirDoesNotExist dir) =
text "Tar directory does not exist:" <+> pPrint dir
-- | File digest verification failed.
data DigestError = DigestError Text Text
deriving Show
instance Pretty DigestError where
pPrint (DigestError currentDigest expectedDigest) =
text [i|Digest error: expected "#{expectedDigest}", but got "#{currentDigest}"|]
-- | Unexpected HTTP status.
data HTTPStatusError = HTTPStatusError Int
deriving Show
instance Pretty HTTPStatusError where
pPrint (HTTPStatusError status) =
text [i|Unexpected HTTP status: #{status}|]
-- | The 'Location' header was expected during a 3xx redirect, but not found.
data NoLocationHeader = NoLocationHeader
deriving Show
instance Pretty NoLocationHeader where
pPrint NoLocationHeader =
text [i|The 'Location' header was expected during a 3xx redirect, but not found.|]
-- | Too many redirects.
data TooManyRedirs = TooManyRedirs
deriving Show
instance Pretty TooManyRedirs where
pPrint TooManyRedirs =
text [i|Too many redirections.|]
-- | A patch could not be applied.
data PatchFailed = PatchFailed
deriving Show
instance Pretty PatchFailed where
pPrint PatchFailed =
text [i|A patch could not be applied.|]
-- | The tool requirements could not be found.
data NoToolRequirements = NoToolRequirements
deriving Show
instance Pretty NoToolRequirements where
pPrint NoToolRequirements =
text [i|The Tool requirements could not be found.|]
data InvalidBuildConfig = InvalidBuildConfig Text
deriving Show
instance Pretty InvalidBuildConfig where
pPrint (InvalidBuildConfig reason) =
text [i|The build config is invalid. Reason was: #{reason}|]
data NoToolVersionSet = NoToolVersionSet Tool
deriving Show
instance Pretty NoToolVersionSet where
pPrint (NoToolVersionSet tool) =
text [i|No version is set for tool "#{tool}".|]
-------------------------
--[ High-level errors ]--
-------------------------
-- | A download failed. The underlying error is encapsulated.
data DownloadFailed = forall es . Show (V es) => DownloadFailed (V es)
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
deriving instance Show DownloadFailed
@@ -145,12 +261,20 @@ deriving instance Show DownloadFailed
-- | A build failed.
data BuildFailed = forall es . Show (V es) => BuildFailed (Path Abs) (V es)
instance Pretty BuildFailed where
pPrint (BuildFailed path reason) =
text [i|BuildFailed failed in dir "#{decUTF8Safe . toFilePath $ path}": #{reason}|]
deriving instance Show BuildFailed
-- | Setting the current GHC version failed.
data GHCupSetError = forall es . Show (V es) => GHCupSetError (V es)
instance Pretty GHCupSetError where
pPrint (GHCupSetError reason) =
text [i|Setting the current GHC version failed: #{reason}|]
deriving instance Show GHCupSetError
@@ -163,11 +287,65 @@ deriving instance Show GHCupSetError
data ParseError = ParseError String
deriving Show
instance Pretty ParseError where
pPrint (ParseError reason) =
text [i|Parsing failed: #{reason}|]
instance Exception ParseError
data UnexpectedListLength = UnexpectedListLength String
deriving Show
instance Pretty UnexpectedListLength where
pPrint (UnexpectedListLength reason) =
text [i|List length unexpected: #{reason}|]
instance Exception UnexpectedListLength
------------------------
--[ 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) =
text [i|Failed to parse URI. Malformed scheme: #{reason}|]
pPrint MalformedUserInfo =
text [i|Failed to parse URI. Malformed user info.|]
pPrint MalformedQuery =
text [i|Failed to parse URI. Malformed query.|]
pPrint MalformedFragment =
text [i|Failed to parse URI. Malformed fragment.|]
pPrint MalformedHost =
text [i|Failed to parse URI. Malformed host.|]
pPrint MalformedPort =
text [i|Failed to parse URI. Malformed port.|]
pPrint MalformedPath =
text [i|Failed to parse URI. Malformed path.|]
pPrint (OtherError err) =
text [i|Failed to parse URI: #{err}|]
#if !defined(TAR)
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"
#endif

123
lib/GHCup/Types.hs
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@@ -1,6 +1,8 @@
{-# OPTIONS_GHC -Wno-orphans #-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-|
Module : GHCup.Types
@@ -15,12 +17,16 @@ module GHCup.Types where
import Data.Map.Strict ( Map )
import Data.List.NonEmpty ( NonEmpty (..) )
import Data.String.Interpolate
import Data.Text ( Text )
import Data.Versions
import HPath
import Text.PrettyPrint.HughesPJClass (Pretty, pPrint, text)
import URI.ByteString
import qualified Data.Text as T
import qualified Data.Text.Encoding as E
import qualified Data.Text.Encoding.Error as E
import qualified GHC.Generics as GHC
import qualified Graphics.Vty as Vty
@@ -106,13 +112,21 @@ data Tag = Latest
| UnknownTag String -- ^ used for upwardscompat
deriving (Ord, Eq, GHC.Generic, Show) -- FIXME: manual JSON instance
prettyTag :: Tag -> String
prettyTag Recommended = "recommended"
prettyTag Latest = "latest"
prettyTag Prerelease = "prerelease"
prettyTag (Base pvp'') = "base-" ++ T.unpack (prettyPVP pvp'')
prettyTag (UnknownTag t ) = t
prettyTag Old = ""
tagToString :: Tag -> String
tagToString Recommended = "recommended"
tagToString Latest = "latest"
tagToString Prerelease = "prerelease"
tagToString (Base pvp'') = "base-" ++ T.unpack (prettyPVP pvp'')
tagToString (UnknownTag t ) = t
tagToString Old = ""
instance Pretty Tag where
pPrint Recommended = text "recommended"
pPrint Latest = text "latest"
pPrint Prerelease = text "prerelease"
pPrint (Base pvp'') = text ("base-" ++ T.unpack (prettyPVP pvp''))
pPrint (UnknownTag t ) = text t
pPrint Old = mempty
data Architecture = A_64
| A_32
@@ -124,15 +138,18 @@ data Architecture = A_64
| A_ARM64
deriving (Eq, GHC.Generic, Ord, Show)
prettyArch :: Architecture -> String
prettyArch A_64 = "x86_64"
prettyArch A_32 = "i386"
prettyArch A_PowerPC = "powerpc"
prettyArch A_PowerPC64 = "powerpc64"
prettyArch A_Sparc = "sparc"
prettyArch A_Sparc64 = "sparc64"
prettyArch A_ARM = "arm"
prettyArch A_ARM64 = "aarch64"
archToString :: Architecture -> String
archToString A_64 = "x86_64"
archToString A_32 = "i386"
archToString A_PowerPC = "powerpc"
archToString A_PowerPC64 = "powerpc64"
archToString A_Sparc = "sparc"
archToString A_Sparc64 = "sparc64"
archToString A_ARM = "arm"
archToString A_ARM64 = "aarch64"
instance Pretty Architecture where
pPrint = text . archToString
data Platform = Linux LinuxDistro
-- ^ must exit
@@ -141,10 +158,13 @@ data Platform = Linux LinuxDistro
| FreeBSD
deriving (Eq, GHC.Generic, Ord, Show)
prettyPlatfrom :: Platform -> String
prettyPlatfrom (Linux distro) = "linux-" ++ prettyDistro distro
prettyPlatfrom Darwin = "darwin"
prettyPlatfrom FreeBSD = "freebsd"
platformToString :: Platform -> String
platformToString (Linux distro) = "linux-" ++ distroToString distro
platformToString Darwin = "darwin"
platformToString FreeBSD = "freebsd"
instance Pretty Platform where
pPrint = text . platformToString
data LinuxDistro = Debian
| Ubuntu
@@ -162,18 +182,21 @@ data LinuxDistro = Debian
-- ^ must exit
deriving (Eq, GHC.Generic, Ord, Show)
prettyDistro :: LinuxDistro -> String
prettyDistro Debian = "debian"
prettyDistro Ubuntu = "ubuntu"
prettyDistro Mint= "mint"
prettyDistro Fedora = "fedora"
prettyDistro CentOS = "centos"
prettyDistro RedHat = "redhat"
prettyDistro Alpine = "alpine"
prettyDistro AmazonLinux = "amazon"
prettyDistro Gentoo = "gentoo"
prettyDistro Exherbo = "exherbo"
prettyDistro UnknownLinux = "unknown"
distroToString :: LinuxDistro -> String
distroToString Debian = "debian"
distroToString Ubuntu = "ubuntu"
distroToString Mint= "mint"
distroToString Fedora = "fedora"
distroToString CentOS = "centos"
distroToString RedHat = "redhat"
distroToString Alpine = "alpine"
distroToString AmazonLinux = "amazon"
distroToString Gentoo = "gentoo"
distroToString Exherbo = "exherbo"
distroToString UnknownLinux = "unknown"
instance Pretty LinuxDistro where
pPrint = text . distroToString
-- | An encapsulation of a download. This can be used
@@ -198,6 +221,10 @@ data TarDir = RealDir (Path Rel)
| RegexDir String -- ^ will be compiled to regex, the first match will "win"
deriving (Eq, Ord, GHC.Generic, Show)
instance Pretty TarDir where
pPrint (RealDir path) = text [i|#{E.decodeUtf8With E.lenientDecode . toFilePath $ path}|]
pPrint (RegexDir regex) = text regex
-- | Where to fetch GHCupDownloads from.
data URLSource = GHCupURL
@@ -317,12 +344,15 @@ data PlatformResult = PlatformResult
}
deriving (Eq, Show)
prettyPlatform :: PlatformResult -> String
prettyPlatform PlatformResult { _platform = plat, _distroVersion = Just v' }
platResToString :: PlatformResult -> String
platResToString PlatformResult { _platform = plat, _distroVersion = Just v' }
= show plat <> ", " <> T.unpack (prettyV v')
prettyPlatform PlatformResult { _platform = plat, _distroVersion = Nothing }
platResToString PlatformResult { _platform = plat, _distroVersion = Nothing }
= show plat
instance Pretty PlatformResult where
pPrint = text . platResToString
data PlatformRequest = PlatformRequest
{ _rArch :: Architecture
, _rPlatform :: Platform
@@ -330,14 +360,17 @@ data PlatformRequest = PlatformRequest
}
deriving (Eq, Show)
prettyPfReq :: PlatformRequest -> String
prettyPfReq (PlatformRequest arch plat ver) =
prettyArch arch ++ "-" ++ prettyPlatfrom plat ++ pver
pfReqToString :: PlatformRequest -> String
pfReqToString (PlatformRequest arch plat ver) =
archToString arch ++ "-" ++ platformToString plat ++ pver
where
pver = case ver of
Just v' -> "-" ++ (T.unpack $ prettyV v')
Nothing -> ""
instance Pretty PlatformRequest where
pPrint = text . pfReqToString
-- | A GHC identified by the target platform triple
-- and the version.
data GHCTargetVersion = GHCTargetVersion
@@ -350,11 +383,13 @@ data GHCTargetVersion = GHCTargetVersion
mkTVer :: Version -> GHCTargetVersion
mkTVer = GHCTargetVersion Nothing
tVerToText :: GHCTargetVersion -> Text
tVerToText (GHCTargetVersion (Just t) v') = t <> "-" <> prettyVer v'
tVerToText (GHCTargetVersion Nothing v') = prettyVer v'
-- | Assembles a path of the form: <target-triple>-<version>
prettyTVer :: GHCTargetVersion -> Text
prettyTVer (GHCTargetVersion (Just t) v') = t <> "-" <> prettyVer v'
prettyTVer (GHCTargetVersion Nothing v') = prettyVer v'
instance Pretty GHCTargetVersion where
pPrint = text . T.unpack . tVerToText
-- | A comparator and a version.
@@ -372,3 +407,9 @@ data VersionRange = SimpleRange (NonEmpty VersionCmp) -- And
| OrRange (NonEmpty VersionCmp) VersionRange
deriving (Eq, GHC.Generic, Ord, Show)
instance Pretty Versioning where
pPrint = text . T.unpack . prettyV
instance Pretty Version where
pPrint = text . T.unpack . prettyVer

2
lib/GHCup/Utils.hs
View File

@@ -650,7 +650,7 @@ ghcToolFiles ver = do
-- fail if ghc is not installed
whenM (fmap not $ liftIO $ doesDirectoryExist ghcdir)
(throwE (NotInstalled GHC (prettyTVer ver)))
(throwE (NotInstalled GHC ver))
files <- liftIO $ getDirsFiles' bindir
-- figure out the <ver> suffix, because this might not be `Version` for

2
lib/GHCup/Utils/Dirs.hs
View File

@@ -214,7 +214,7 @@ ghcupGHCDir :: (MonadReader AppState m, MonadThrow m)
-> m (Path Abs)
ghcupGHCDir ver = do
ghcbasedir <- ghcupGHCBaseDir
verdir <- parseRel $ E.encodeUtf8 (prettyTVer ver)
verdir <- parseRel $ E.encodeUtf8 (tVerToText ver)
pure (ghcbasedir </> verdir)

12
lib/GHCup/Utils/File.hs
View File

@@ -43,7 +43,7 @@ import GHC.IO.Exception
import HPath
import HPath.IO hiding ( hideError )
import Optics hiding ((<|), (|>))
import System.Console.Pretty
import System.Console.Pretty hiding ( Pretty )
import System.Console.Regions
import System.IO.Error
import System.Posix.Directory.ByteString
@@ -55,6 +55,7 @@ import "unix" System.Posix.IO.ByteString
hiding ( openFd )
import System.Posix.Process ( ProcessStatus(..) )
import System.Posix.Types
import Text.PrettyPrint.HughesPJClass hiding ( (<>) )
import Text.Regex.Posix
@@ -79,6 +80,15 @@ data ProcessError = NonZeroExit Int ByteString [ByteString]
| NoSuchPid ByteString [ByteString]
deriving Show
instance Pretty ProcessError where
pPrint (NonZeroExit e exe args) =
text [i|Process "#{decUTF8Safe exe}" with arguments #{fmap decUTF8Safe args} failed with exit code #{e}.|]
pPrint (PTerminated exe args) =
text [i|Process "#{decUTF8Safe exe}" with arguments #{fmap decUTF8Safe args} terminated.|]
pPrint (PStopped exe args) =
text [i|Process "#{decUTF8Safe exe}" with arguments #{fmap decUTF8Safe args} stopped.|]
pPrint (NoSuchPid exe args) =
text [i|Could not find PID for process running "#{decUTF8Safe exe}" with arguments #{fmap decUTF8Safe args}.|]
data CapturedProcess = CapturedProcess
{ _exitCode :: ExitCode