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{-# LANGUAGE CPP #-}
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
{- |
Module : Plugins.Monitors.PacmanUpdates
Copyright : (c) 2024 Enrico Maria De Angelis
, (c) 2025 Alexander Pankoff
License : BSD-style (see LICENSE)
Maintainer : Enrico Maria De Angelis <enricomaria.dean6elis@gmail.com>
Stability : unstable
Portability : unportable
A Pacman updates availablility plugin for Xmobar
-}
module Xmobar.Plugins.PacmanUpdates (PacmanUpdates (..)) where
import System.Exit (ExitCode (..))
import System.Process (readProcessWithExitCode)
import Xmobar.Plugins.Command (Rate)
import Xmobar.Run.Exec
data PacmanUpdates = PacmanUpdates (String, String, String, String) Rate
deriving (Read, Show)
instance Exec PacmanUpdates where
alias = const "pacman"
rate (PacmanUpdates _ r) = r
run (PacmanUpdates (z, o, m, e) _) = do
(exit, stdout, _) <- readProcessWithExitCode "checkupdates" [] ""
return $ case exit of
ExitFailure 2 -> z -- ero updates
ExitFailure 1 -> e
ExitSuccess -> case length $ lines stdout of
0 -> impossible
1 -> o
n -> m >>= \c -> if c == '?' then show n else pure c
_ -> impossible
where
impossible = error "This is impossible based on pacman manpage"
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