98 lines
2.3 KiB
Nix
98 lines
2.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with import <stockholm/lib>;
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let
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cfg = config.krebs.fetchWallpaper;
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out = {
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options.krebs.fetchWallpaper = api;
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config = lib.mkIf cfg.enable imp;
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};
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api = {
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enable = mkEnableOption "fetch wallpaper";
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url = mkOption {
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type = types.str;
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};
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timerConfig = mkOption {
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type = types.unspecified;
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default = {
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OnCalendar = "*:00,10,20,30,40,50";
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};
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};
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stateDir = mkOption {
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type = types.str;
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default = "/var/lib/wallpaper";
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};
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display = mkOption {
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type = types.int;
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default = config.services.xserver.display;
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};
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unitConfig = mkOption {
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type = types.attrsOf types.str;
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description = "Extra unit configuration for fetchWallpaper to define conditions and assertions for the unit";
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example = literalExample ''
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# do not start when running on umts
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{ ConditionPathExists = "!/var/run/ppp0.pid"; }
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'';
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default = {};
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};
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maxTime = mkOption {
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type = types.int;
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default = 0;
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description = "Time to wait before download is aborted";
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};
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};
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fetchWallpaperScript = pkgs.writeDash "fetchWallpaper" ''
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set -euf
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mkdir -p ${cfg.stateDir}
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chmod o+rx ${cfg.stateDir}
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cd ${cfg.stateDir}
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(curl --max-time ${toString cfg.maxTime} -s -o wallpaper.tmp -z wallpaper.tmp ${shell.escape cfg.url} && cp wallpaper.tmp wallpaper) || :
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feh --no-fehbg --bg-scale ${shell.escape cfg.stateDir}/wallpaper
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'';
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imp = {
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users.users.fetchWallpaper = {
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name = "fetchWallpaper";
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uid = genid "fetchWallpaper";
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description = "fetchWallpaper user";
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home = cfg.stateDir;
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createHome = true;
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};
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systemd.timers.fetchWallpaper = {
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description = "fetch wallpaper timer";
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wantedBy = [ "timers.target" ];
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timerConfig = cfg.timerConfig;
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};
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systemd.services.fetchWallpaper = {
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description = "fetch wallpaper";
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after = [ "network.target" ];
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path = with pkgs; [
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curl
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feh
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];
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environment = {
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URL = cfg.url;
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DISPLAY = ":${toString cfg.display}";
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};
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restartIfChanged = true;
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serviceConfig = {
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Type = "simple";
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ExecStart = fetchWallpaperScript;
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User = "fetchWallpaper";
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};
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unitConfig = cfg.unitConfig;
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};
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};
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in out
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