nix configuration (??)

i know that's not perfect. the best i can come up with right now.

core/tabs/applications-setup/docker-setup.sh

@@ -4,7 +4,6 @@
 
 # Function to prompt the user for installation choice
 choose_installation() {
-    clear
     printf "%b\n" "${YELLOW}Choose what to install:${RC}"
     printf "%b\n" "1. ${YELLOW}Docker${RC}"
     printf "%b\n" "2. ${YELLOW}Docker Compose${RC}"
@@ -36,6 +35,11 @@ install_docker() {
             "$ESCALATION_TOOL" systemctl enable docker
             "$ESCALATION_TOOL" systemctl start docker
             ;;
+        nix-env)
+            "$PACKAGER" -iA nixpkgs.docker
+            "$ESCALATION_TOOL" sed -i '/^virtualisation\.docker\.enable/!b; s/^virtualisation\.docker\.enable.*/virtualisation.docker.enable = true;/' "$NIXOS_CONFIG" || echo 'virtualisation.docker.enable = true;' | "$ESCALATION_TOOL" tee -a "$NIXOS_CONFIG"
+            "$ESCALATION_TOOL" nixos-rebuild switch
+            ;;
         *)
             printf "%b\n" "${RED}Unsupported package manager: ""$PACKAGER""${RC}"
             exit 1
@@ -55,6 +59,9 @@ install_docker_compose() {
         pacman)
             "$ESCALATION_TOOL" "$PACKAGER" -S --needed --noconfirm docker-compose
             ;;
+        nix-env)
+            "$PACKAGER" -iA nixpkgs.docker-compose
+            ;;
         *)
             printf "%b\n" "${RED}Unsupported package manager: ""$PACKAGER""${RC}"
             exit 1
@@ -84,4 +91,4 @@ install_components() {
 
 checkEnv
 checkEscalationTool
-install_components
+install_components

core/tabs/applications-setup/dwmtitus-setup.sh

@@ -15,6 +15,8 @@ setupDWM() {
             "$ESCALATION_TOOL" "$PACKAGER" groupinstall -y "Development Tools"
             "$ESCALATION_TOOL" "$PACKAGER" install -y libX11-devel libXinerama-devel libXft-devel imlib2-devel libxcb-devel unzip flameshot lxappearance feh mate-polkit # no need to include git here as it should be already installed via "Development Tools"
             ;;
+        nix-env)
+            ;;
         *)
             printf "%b\n" "${RED}Unsupported package manager: ""$PACKAGER""${RC}"
             exit 1

core/tabs/applications-setup/setup-flatpak.sh

@@ -27,6 +27,8 @@ setup_flatpak() {
                 ;;
             nix-env)
                 "$PACKAGER" -iA nixpkgs.flatpak
+                "$ESCALATION_TOOL" sed -i '/^services\.flatpak\.enable/!b; s/^services\.flatpak\.enable.*/services.flatpak.enable = true;/' "$NIXOS_CONFIG" || echo 'services.flatpak.enable = true;' | "$ESCALATION_TOOL" tee -a "$NIXOS_CONFIG"
+                "$ESCALATION_TOOL" nixos-rebuild switch
                 ;;
             *)
                 "$ESCALATION_TOOL" "$PACKAGER" install -y flatpak

core/tabs/common-script.sh

@@ -78,6 +78,16 @@ checkPackageManager() {
         if command_exists "${pgm}"; then
             PACKAGER=${pgm}
             printf "%b\n" "${CYAN}Using ${pgm} as package manager${RC}"
+            
+            if [ $PACKAGER = 'nix-env' ] && [ -z "$NIXOS_CONFIG" ]; then
+                NIXOS_CONFIG="/etc/nixos/configuration.nix"
+                while [ ! -f "$NIXOS_CONFIG" ]; do
+                    printf "%b\n" "${RED}configuration.nix not found.${RC}"
+                    printf "%b" "${YELLOW}Enter the path manually: ${RC}"
+                    read -r NIXOS_CONFIG
+                done
+            fi
+
             break
         fi
     done