Use notify-send from nix within scripts

Also adjust dmenu selection to follow my naming conventions.
Ensure other dependencies are provided via nix.

home/modules/programs/khal.nix

@@ -5,8 +5,6 @@ with lib;
 let
   cfg = config.programs.khal;
 
-  # TODO: Make more compatible, e.g. provide notify from outside and add checks whether to use or not.
-  # Maybe create small php script instead which parses the khal output and checks for beginning
   notificationScript = pkgs.writeShellApplication {
     name = "khal-notification";
     text = ''
@@ -16,7 +14,7 @@ let
         exit 0;
       fi
 
-      notify-send \
+      ${pkgs.libnotify}/bin/notify-send \
         --urgency=critical \
         --expire-time=90000 \
         --icon="${config.gtk.iconTheme.package}/share/icons/${config.gtk.iconTheme.name}/32/apps/office-calendar.svg" \

home/packages/custom/dmenu-scripts/default.nix

@@ -2,20 +2,15 @@
   writeShellApplication,
   dmenu,
   dunst,
+  libnotify,
   bc,
-  firefox,
-  i3
+  i3,
+  xdg-utils
 }:
 
 let
 
-  # Still has many references to Ubuntu system tools.
-  # Will migrate step by step and update references.
-
-  # For now it is cool to have a first custom package which can be installed.
-
-  # It already uses nix dunst and dmenu.
-  # Also things like version switch should not be necessary once I managed nix shells.
+  # Things like version switch should not be necessary once I managed nix shells.
 
   dmenu-custom-scripts-calc = writeShellApplication {
     name = "dmenu-custom-scripts-calc";
@@ -73,12 +68,12 @@ let
 
     runtimeInputs = [
       dmenu
-      firefox
+      xdg-utils
     ];
 
     text = ''
       file=$(find ~/Projects/docs/php/ -maxdepth 1 -name '*.html' -printf "%f\n" | dmenu -i -l 20 -p "Search Term")
-      firefox --new-tab "http://php.docs.localhost/$file"
+      xdg-open "http://php.docs.localhost/$file"
     '';
   };
 
@@ -87,6 +82,7 @@ let
 
     runtimeInputs = [
       dmenu
+      libnotify
     ];
 
     text = ''
@@ -102,6 +98,7 @@ let
 
     runtimeInputs = [
       dmenu
+      libnotify
     ];
 
     text = builtins.readFile ./xdebug.sh;
@@ -109,7 +106,7 @@ let
 
 in
 writeShellApplication {
-  name = "dmenu_selection";
+  name = "custom-dmenu-selection";
 
   # TODO: Find way to remove the nix prefixes from "files"
   text = ''

home/packages/custom/dmenu-scripts/system.sh

@@ -22,7 +22,7 @@ case "$chosen" in
 "logout")
     i3-msg exit
     ;;
-# Not supported, seems to complicated and not recommended with ssh
+# Not supported, seems to complicated and not recommended with
 # "hibernate")
 #     pkill -u "$USER" -USR1 dunst
 #     i3lock -c '#2E3436'

home/windowManager/i3.nix

@@ -1,4 +1,4 @@
-{ config }:
+{ config, pkgs }:
 
 let
   modifier = config.xsession.windowManager.i3.config.modifier;
@@ -216,7 +216,7 @@ in {
       # For docs, see: https://developer.gnome.org/integration-guide/stable/desktop-files.html.en
       "${modifier}+a" = "exec --no-startup-id i3-dmenu-desktop";
 
-      "${modifier}+space" = "exec --no-startup-id dmenu_selection";
+      "${modifier}+space" = "exec --no-startup-id custom-dmenu-selection";
 
       # change focus
       "${modifier}+h" = "focus left";
@@ -317,10 +317,10 @@ in {
       # ~ > pacmd move-sink-input 3 8
 
       # Function Key Bindings (💡)
-      "XF86MonBrightnessUp" = "exec xbacklight -inc 10 && notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
-      "XF86MonBrightnessDown" = "exec xbacklight -dec 10 && notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
-      "Shift+XF86MonBrightnessUp" = "exec xbacklight -inc 1 && notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
-      "Shift+XF86MonBrightnessDown" = "exec xbacklight -dec 1 && notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
+      "XF86MonBrightnessUp" = "exec xbacklight -inc 10 && ${pkgs.libnotify}/bin/notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
+      "XF86MonBrightnessDown" = "exec xbacklight -dec 10 && ${pkgs.libnotify}/bin/notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
+      "Shift+XF86MonBrightnessUp" = "exec xbacklight -inc 1 && ${pkgs.libnotify}/bin/notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
+      "Shift+XF86MonBrightnessDown" = "exec xbacklight -dec 1 && ${pkgs.libnotify}/bin/notify-send \"Changed Display Brightness\" \"Now: $(xbacklight)\"";
 
       # Dunst Key Bindings
       # See: man dunstctl.1

home/xsession.nix

@@ -29,6 +29,6 @@
   '';
 
   windowManager.i3 = import ./windowManager/i3.nix {
-    inherit config;
+    inherit config pkgs;
   };
 }

shells/reuter/monorepo.nix

@@ -16,7 +16,7 @@ let
     name = "project-frontend-compile";
     text = ''
       yarn run build
-      notify-send "done compiling frontend"
+      ${pkgs.libnotify}/bin/notify-send "done compiling frontend"
     '';
   };