feat: steal theming from lassulus

configs/alacritty.nix

@@ -3,29 +3,15 @@
   lib,
   config,
   ...
-}: {
-  environment.variables.TERMINAL = "alacritty";
-
-  environment.systemPackages = [
-    pkgs.alacritty
-  ];
-
-  home-manager.users.me.xdg.configFile = let
-    inherit (import <niveum/lib>) colours;
-    colourNames = ["black" "red" "green" "yellow" "blue" "magenta" "cyan" "white"];
-    colourPairs = lib.getAttrs colourNames colours;
-  in {
-    "alacritty/alacritty.yml".source = (pkgs.formats.yaml {}).generate "alacritty.yml" {
+}: let
+  alacritty-cfg = theme:
+    (pkgs.formats.yaml {}).generate "alacritty.yml" {
       window.opacity = 0.9;
-      colors = {
-        primary = {inherit (colours) background foreground;};
-        normal = lib.mapAttrs (_: colour: colour.dark) colourPairs;
-        bright = lib.mapAttrs (_: colour: colour.bright) colourPairs;
-      };
       font = {
         normal.family = "Monospace";
         size = 6;
       };
+      live_config_reload = true;
       key_bindings = [
         {
           key = "Plus";
@@ -43,6 +29,33 @@
           action = "ResetFontSize";
         }
       ];
+      colors = let
+        colourNames = ["black" "red" "green" "yellow" "blue" "magenta" "cyan" "white"];
+        colourPairs = lib.getAttrs colourNames theme;
+      in {
+        primary = {inherit (theme) background foreground;};
+        normal = lib.mapAttrs (_: colour: colour.dark) colourPairs;
+        bright = lib.mapAttrs (_: colour: colour.bright) colourPairs;
+      };
     };
+  alacritty-pkg = pkgs.symlinkJoin {
+    name = "alacritty";
+    paths = [
+      (pkgs.writeDashBin "alacritty" ''
+        ${pkgs.alacritty}/bin/alacritty --config-file /var/theme/config/alacritty.yml "$@"
+      '')
+      pkgs.alacritty
+    ];
+  };
+in {
+  environment.variables.TERMINAL = "alacritty";
+
+  environment.systemPackages = [
+    alacritty-pkg
+  ];
+
+  environment.etc = {
+    "themes/dark/alacritty.yml".source = alacritty-cfg (import <niveum/lib/colours/solarized-dark.nix>);
+    "themes/light/alacritty.yml".source = alacritty-cfg (import <niveum/lib/colours/solarized-light.nix>);
   };
 }

configs/chromium.nix

@@ -7,6 +7,7 @@
       "cjpalhdlnbpafiamejdnhcphjbkeiagm" # uBlock Origin
       "pjjgklgkfeoeiebjogplpnibpfnffkng" # undistracted
       "nhdogjmejiglipccpnnnanhbledajbpd" # vuejs devtools
+      "eimadpbcbfnmbkopoojfekhnkhdbieeh" # dark reader
     ];
   };
 

configs/default.nix

@@ -256,7 +256,7 @@ in {
     ./sshd.nix
     ./sudo.nix
     ./sxiv.nix
-    ./theming.nix
+    ./themes.nix
     ./tmux.nix
     ./traadfri.nix
     ./unclutter.nix

configs/i3.nix

@@ -248,8 +248,9 @@ in {
         "${modifier}+p" = "exec --no-startup-id ${pkgs.pass}/bin/passmenu -l 5";
         "${modifier}+u" = "exec ${pkgs.scripts.unicodmenu}/bin/unicodmenu";
 
+        "${modifier}+F6" = "exec ${pkgs.xorg.xkill}/bin/xkill";
         "${modifier}+F7" = "exec ${pkgs.scripts.showkeys-toggle}/bin/showkeys-toggle";
-        "${modifier}+F8" = "exec ${pkgs.xorg.xkill}/bin/xkill";
+        "${modifier}+F8" = "exec switch-theme toggle";
         "${modifier}+F9" = "exec ${pkgs.redshift}/bin/redshift -O 4000 -b 0.85";
         "${modifier}+F10" = "exec ${pkgs.redshift}/bin/redshift -x";
         "${modifier}+F11" = "exec ${pkgs.xcalib}/bin/xcalib -invert -alter";

configs/themes.nix

@@ -0,0 +1,82 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  switch-theme = pkgs.writers.writeDashBin "switch-theme" ''
+    set -efux
+    if [ "$1" = toggle ]; then
+      if [ "$(${pkgs.coreutils}/bin/cat /var/theme/current_theme)" = dark ]; then
+        ${placeholder "out"}/bin/switch-theme light
+      else
+        ${placeholder "out"}/bin/switch-theme dark
+      fi
+    elif test -e "/etc/themes/$1"; then
+      mkdir -p /var/theme/config
+      ${pkgs.rsync}/bin/rsync --chown=${config.users.users.me.name}:users -a --delete "/etc/themes/$1/" /var/theme/config/
+      echo "$1" > /var/theme/current_theme
+      ${pkgs.coreutils}/bin/chown ${config.users.users.me.name}:users /var/theme/current_theme
+      ${pkgs.xorg.xrdb}/bin/xrdb -merge /var/theme/config/xresources
+      ${pkgs.procps}/bin/pkill -HUP xsettingsd
+    else
+      echo "theme $1 not found"
+    fi
+  '';
+in {
+  systemd.services.xsettingsd = {
+    wantedBy = ["multi-user.target"];
+    after = ["display-manager.service"];
+    environment.DISPLAY = ":0";
+    serviceConfig = {
+      ExecStart = "${pkgs.xsettingsd}/bin/xsettingsd -c /var/theme/config/xsettings.conf";
+      User = config.users.users.me.name;
+      Restart = "always";
+      RestartSec = "15s";
+    };
+  };
+
+  systemd.tmpfiles.rules = [
+    "d /var/theme/ 755 ${config.users.users.me.name} users"
+  ];
+
+  environment.systemPackages = [
+    switch-theme
+    pkgs.capitaine-cursors
+  ];
+
+  home-manager.users.me = {
+    home.pointerCursor = {
+      name = "capitaine-cursors-white";
+      package = pkgs.capitaine-cursors;
+      size = 16;
+    };
+  };
+
+  environment.etc = {
+    "themes/light/xsettings.conf".text = ''
+      Net/ThemeName "Adwaita"
+    '';
+    "themes/light/xresources".text = ''
+      *background: #ffffff
+      *foreground: #000000
+    '';
+    "themes/dark/xsettings.conf".text = ''
+      Net/ThemeName "Adwaita-dark"
+    '';
+    "themes/dark/xresources".text = ''
+      *background: #000000
+      *foreground: #ffffff
+    '';
+  };
+
+  system.activationScripts.theme.text = ''
+    export DISPLAY=:0
+    if test -e /var/theme/current_theme; then
+      ${switch-theme}/bin/switch-theme "$(cat /var/theme/current_theme)" ||
+      ${switch-theme}/bin/switch-theme dark
+    else
+      ${switch-theme}/bin/switch-theme dark
+    fi
+  '';
+}

lib/default-applications.nix

@@ -1,5 +1,5 @@
 pkgs: rec {
-  terminal = "${pkgs.alacritty}/bin/alacritty";
+  terminal = "alacritty";
   browser = "${pkgs.brave}/bin/brave";
   fileManager = "${terminal} -e ${pkgs.ranger}/bin/ranger";
 }