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-- | Maintainer: Zihao Wang <dev@wzhd.org>
--
-- Support for the Pacman package manager <https://www.archlinux.org/pacman/>
module Propellor.Property.Pacman where
import Propellor.Base
runPacman :: [String] -> UncheckedProperty ArchLinux
runPacman ps = tightenTargets $ cmdProperty "pacman" ps
-- | Have pacman update its lists of packages, but without upgrading anything.
update :: Property ArchLinux
update = combineProperties ("pacman update") $ props
& runPacman ["-Sy", "--noconfirm"]
`assume` MadeChange
upgrade :: Property ArchLinux
upgrade = combineProperties ("pacman upgrade") $ props
& runPacman ["-Syu", "--noconfirm"]
`assume` MadeChange
type Package = String
installed :: [Package] -> Property ArchLinux
installed = installed' ["--noconfirm"]
installed' :: [String] -> [Package] -> Property ArchLinux
installed' params ps = check (not <$> isInstalled' ps) go
`describe` unwords ("pacman installed":ps)
where
go = runPacman (params ++ ["-S"] ++ ps)
removed :: [Package] -> Property ArchLinux
removed ps = check (any (== IsInstalled) <$> getInstallStatus ps)
(runPacman (["-R", "--noconfirm"] ++ ps))
`describe` unwords ("pacman removed":ps)
isInstalled :: Package -> IO Bool
isInstalled p = isInstalled' [p]
isInstalled' :: [Package] -> IO Bool
isInstalled' ps = all (== IsInstalled) <$> getInstallStatus ps
data InstallStatus = IsInstalled | NotInstalled
deriving (Show, Eq)
{- Returns the InstallStatus of packages that are installed
- or known and not installed. If a package is not known at all to apt
- or dpkg, it is not included in the list. -}
getInstallStatus :: [Package] -> IO [InstallStatus]
getInstallStatus ps = mapMaybe id <$> mapM status ps
where
status :: Package -> IO (Maybe InstallStatus)
status p = do
ifM (succeeds "pacman" ["-Q", p])
(return (Just IsInstalled),
ifM (succeeds "pacman" ["-Sp", p])
(return (Just NotInstalled),
return Nothing))
succeeds :: String -> [String] -> IO Bool
succeeds cmd args = (quietProcess >> return True)
`catchIO` (\_ -> return False)
where
quietProcess :: IO ()
quietProcess = withQuietOutput createProcessSuccess p
p = (proc cmd args)
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