36 lines
1.2 KiB
Nix
36 lines
1.2 KiB
Nix
{ lib, pkgs, config, ... }:
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let
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inherit (import ../../lib) writeHaskellScript;
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randomWallpaper = writeHaskellScript {
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name = "random-wallpaper";
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imports = [ "System.Random" ];
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bins = [ pkgs.coreutils pkgs.sway ];
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} ''
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linkPath = "/home/maralorn/volatile/wallpaper.jpg"
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main = do
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mode <- cat "/home/maralorn/tmp/mode" |> captureTrim
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(lines . decodeUtf8 -> files) <- ls ([i|/home/maralorn/.wallpapers/#{mode}|] :: String) |> captureTrim
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((files Unsafe.!!) -> file) <- getStdRandom $ randomR (0, length files - 1)
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(decodeUtf8 -> current) <- readlink linkPath |> captureTrim
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let new = [i|/home/maralorn/.wallpapers/#{mode}/#{file}|] :: String
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when (new /= current) $ do
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ln "-sf" new linkPath
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swaymsg "output * bg /home/maralorn/volatile/wallpaper.jpg fill"
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'';
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in {
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home.packages = [ randomWallpaper ];
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systemd.user = {
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services.random-wallpaper = {
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Unit = { Description = "Random Wallpaper"; };
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Service = {
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ExecStart = "${randomWallpaper}/bin/random-wallpaper";
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Type = "oneshot";
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};
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};
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timers.random-wallpaper = {
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Timer = { OnCalendar = "*:00/30:00"; };
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Install = { WantedBy = [ "timers.target" ]; };
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};
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};
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}
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