90 lines
2.0 KiB
Nix
90 lines
2.0 KiB
Nix
{ config, lib, pkgs, ... }:
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with 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 = 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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predicate = mkOption {
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type = with types; nullOr path;
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default = null;
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};
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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.str;
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default = ":11";
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};
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};
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fetchWallpaperScript = pkgs.writeScript "fetchWallpaper" ''
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#! ${pkgs.bash}/bin/bash
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${optionalString (cfg.predicate != null) ''
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if ! ${cfg.predicate}; then
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echo "predicate failed - will not fetch from remote"
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exit 0
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fi
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''}
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mkdir -p ${shell.escape cfg.stateDir}
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curl -s -o ${shell.escape cfg.stateDir}/wallpaper -z ${shell.escape cfg.stateDir}/wallpaper ${shell.escape cfg.url}
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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 = 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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};
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};
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in out
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