feat(nixos): migrate system configuration
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179
configs/nixos/modules/desktop/session/waybar.nix
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179
configs/nixos/modules/desktop/session/waybar.nix
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{
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config,
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lib,
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pkgs,
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...
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}:
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# Waybar: a top status bar reading system state at a glance.
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let
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cfg = config.modules.desktop.session.waybar;
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user = config.user.name;
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# A Nerd Font Private-Use-Area codepoint as a literal character, decoded
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# through JSON so the glyph survives as bytes rather than an editor paste.
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g = code: builtins.fromJSON ''"\u${code}"'';
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sleepOffIcon = builtins.fromJSON ''"\udb81\udcb3"'';
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# Renders and toggles mako's do-not-disturb mode.
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# With no mako daemon answering, the status reads "notifications on", keeping
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# the widget inert rather than broken.
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dndStatus = pkgs.writeShellScript "waybar-dnd-status" ''
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if ${pkgs.mako}/bin/makoctl mode 2>/dev/null | ${pkgs.gnugrep}/bin/grep -qx dnd; then
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printf '{"text":"${g "f1f6"}","tooltip":"Do not disturb: on","class":"dnd"}\n'
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else
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printf '{"text":"${g "f0f3"}","tooltip":"Notifications on","class":"active"}\n'
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fi
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'';
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dndToggle = pkgs.writeShellScript "waybar-dnd-toggle" ''
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${pkgs.mako}/bin/makoctl mode -t dnd >/dev/null 2>&1
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${pkgs.procps}/bin/pkill -RTMIN+8 waybar
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'';
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# Lit while a wf-recorder capture is running.
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# Empty text collapses the widget when idle, so it shows nothing until then.
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recStatus = pkgs.writeShellScript "waybar-recording-status" ''
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if ${pkgs.procps}/bin/pgrep -x wf-recorder >/dev/null; then
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printf '{"text":"${g "f03d"}","tooltip":"Recording","class":"recording"}\n'
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else
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printf '{"text":"","class":"idle"}\n'
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fi
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'';
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idleLockStatus = pkgs.writeShellScript "waybar-idle-lock-status" ''
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if ${pkgs.systemd}/bin/systemctl --user is-active --quiet lockscreen-idle-inhibit.service; then
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printf '{"text":"${sleepOffIcon}","tooltip":"Idle locking inhibited","class":"inhibited"}\n'
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else
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printf '{"text":"","class":"idle"}\n'
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fi
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'';
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in
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{
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options.modules.desktop.session.waybar.enable = lib.mkEnableOption "the Waybar status bar";
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config = lib.mkIf cfg.enable {
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# A symbols font backs the module glyphs, so pango falls back to it for the
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# codepoints Stylix's monospace font does not carry.
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fonts.packages = [ pkgs.nerd-fonts.symbols-only ];
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home-manager.users.${user}.programs.waybar = {
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enable = true;
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# A user service bound to graphical-session.target, which uwsm activates,
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# so the bar comes up with the session and no compositor exec-once.
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systemd.enable = true;
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settings.mainBar = {
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layer = "top";
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position = "top";
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height = 30;
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modules-left = [ "hyprland/workspaces" ];
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modules-center = [ "clock" ];
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modules-right = [
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"custom/recording"
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"custom/idle-lock"
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"mpris"
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"wireplumber"
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"network"
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"battery"
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"custom/dnd"
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];
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# Per-application icons for the windows on each workspace, mapped from
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# window class with a neutral glyph for anything unlisted.
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"hyprland/workspaces" = {
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on-click = "activate";
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format = "{id} {windows}";
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format-window-separator = " ";
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window-rewrite-default = g "f2d0";
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window-rewrite = {
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"class<Alacritty>" = g "f120";
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"class<com.mitchellh.ghostty>" = g "f120";
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"class<.*[Ff]irefox.*>" = g "f269";
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"class<chromium.*>" = g "f268";
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"class<[Cc]ode>" = g "f121";
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"class<obsidian>" = g "f02d";
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"class<[Ss]team>" = g "f1b6";
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};
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};
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clock = {
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format = "{:%a %d %b %H:%M}";
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tooltip-format = "<tt>{calendar}</tt>";
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calendar = {
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mode = "month";
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# Underline the current day so it stands out in the grid.
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format.today = "<b><u>{}</u></b>";
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};
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};
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mpris = {
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format = "${g "f001"} {title}";
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format-paused = "${g "f04c"} {title}";
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max-length = 40;
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on-click = "play-pause";
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on-scroll-up = "next";
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on-scroll-down = "previous";
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};
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wireplumber = {
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format = "{icon} {volume}%";
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format-muted = "${g "f026"} muted";
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format-icons = [
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(g "f026")
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(g "f027")
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(g "f028")
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];
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on-click = "${pkgs.wireplumber}/bin/wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle";
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};
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network = {
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format-wifi = "${g "f1eb"} {essid}";
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format-ethernet = "${g "f796"} {ifname}";
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format-disconnected = "${g "f127"} off";
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tooltip-format = "{ipaddr} via {gwaddr}";
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};
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battery = {
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format = "{icon} {capacity}%";
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format-charging = "${g "f0e7"} {capacity}%";
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format-icons = [
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(g "f244")
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(g "f243")
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(g "f242")
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(g "f241")
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(g "f240")
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];
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states = {
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warning = 20;
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critical = 10;
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};
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};
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"custom/dnd" = {
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return-type = "json";
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exec = "${dndStatus}";
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on-click = "${dndToggle}";
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interval = "once";
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signal = 8;
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};
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# Recording state has no event to hook, so the widget samples the
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# wf-recorder process once a second.
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"custom/recording" = {
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return-type = "json";
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exec = "${recStatus}";
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interval = 1;
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};
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"custom/idle-lock" = {
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return-type = "json";
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exec = "${idleLockStatus}";
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interval = "once";
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signal = 9;
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};
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};
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};
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};
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}
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