From da6508cb5fba80d97110c705a7c496b6e76c4776 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Thu, 9 Oct 2025 01:51:46 +0200
Subject: xmonad-tv: run alacritty in dedicated slice

---
 pkgs/haskell/xmonad-tv/src/main.hs | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/pkgs/haskell/xmonad-tv/src/main.hs b/pkgs/haskell/xmonad-tv/src/main.hs
index 889038b..a747a04 100644
--- a/pkgs/haskell/xmonad-tv/src/main.hs
+++ b/pkgs/haskell/xmonad-tv/src/main.hs
@@ -45,6 +45,11 @@ import XMonad.Hooks.Place (placeHook, smart)
 import XMonad.Actions.PerWorkspaceKeys (chooseAction)
 
 import Shutdown (shutdown, newShutdownEventHandler)
+import System.IO.Unsafe (unsafePerformIO)
+
+
+sliceEnvPath :: FilePath
+sliceEnvPath = unsafePerformIO (getEnv "XMONAD_CACHE_DIR") <> "/slice.env"
 
 
 main :: IO ()
@@ -71,6 +76,7 @@ readEnv' defaultValue name =
 
 mainNoArgs :: IO ()
 mainNoArgs = do
+    getEnvironment >>= \env -> writeFile sliceEnvPath $ unlines [ k <> "=" <> v | (k, v) <- env]
     myMasterDelta <- readEnv' (1 / 20) "XMONAD_MASTER_DELTA" :: IO Rational
     myMasterWidth <- readEnv' (1 / 2) "XMONAD_MASTER_WIDTH" :: IO Rational
     myScreenGaps <- readEnv' [] "XMONAD_SCREEN_GAPS" :: IO [Int]
@@ -140,6 +146,19 @@ forkFile path args env = void . xfork $ do
     executeFile path True args (env <> Just environment)
 
 
+forkFileInSlice :: String -> FilePath -> [String] -> X ()
+forkFileInSlice sliceName path args = void . xfork $
+    executeFile {-pkg:systemd-}"systemd-run" True
+                ( "--collect"
+                : "--user"
+                : "--slice=" <> sliceName
+                : "--property=EnvironmentFile=" <> sliceEnvPath
+                : path
+                : args
+                )
+                Nothing
+
+
 myKeys :: XConfig Layout -> Map (KeyMask, KeySym) (X ())
 myKeys conf = Map.fromList $
     [ ((_4  , xK_Escape ), forkFile {-pkg-}"slock" [] Nothing)
@@ -150,8 +169,8 @@ myKeys conf = Map.fromList $
     , ((_4  , xK_p      ), forkFile {-pkg:fzmenu-}"passmenu" [] Nothing)
     , ((_4C , xK_p      ), forkFile {-pkg:fzmenu-}"passmenu" ["--phase2-method=copy"] Nothing)
 
-    , ((_4  , xK_x      ), forkFile {-pkg:alacritty-tv-}"alacritty" ["--dtach", "--singleton"] Nothing)
-    , ((_4C , xK_x      ), forkFile {-pkg:alacritty-tv-}"alacritty" ["--profile=root", "-e", "/run/wrappers/bin/su", "-"] Nothing)
+    , ((_4  , xK_x      ), forkFileInSlice "alacritty" {-pkg:alacritty-tv-}"alacritty" ["--dtach", "--singleton"])
+    , ((_4C , xK_x      ), forkFileInSlice "alacritty" {-pkg:alacritty-tv-}"alacritty" ["--profile=root", "-e", "/run/wrappers/bin/su", "-"])
 
     , ((_C  , xK_Menu   ), toggleWS)
 
-- 
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