host: add deault implementation for system.build.isoImage target (per host)

README.md

@@ -170,10 +170,9 @@ nix build ./#homeConfigurations.NixOS.nixos.home.activationPackage
 
 ## Build an ISO
 
-You can make an ISO and customize it by modifying the [niximg](./hosts/niximg.nix)
+You can make an ISO out of any config:
-file:
 ```sh
-flk iso
+flk iso yourConfig # build an iso for hosts/yourConfig.nix
 ```
 
 ## Hardware Specific Profile for a Single Host

hosts/default.nix

@@ -15,8 +15,40 @@ let
   unstableModules = [ ];
   addToDisabledModules = [ ];
 
+  libExt = lib.extend (
+    final: prev: {
+      nixosSystemExtended = { modules, ... } @ args:
+        lib.nixosSystem (args // {
+            modules =
+              let
+                isoConfig = (
+                  import (nixos + "/nixos/lib/eval-config.nix")
+                    (
+                      args // {
+                        modules = modules ++ [
+                          (nixos + "/nixos/modules/installer/cd-dvd/installation-cd-minimal-new-kernel.nix")
+                          ({ config, ... }: {
+                            isoImage.isoBaseName = "nixos-" + config.networking.hostName;
+                          })
+                        ];
+                      }
+                    )
+                ).config;
+              in
+                modules ++ [
+                  {
+                    system.build = {
+                      iso = isoConfig.system.build.isoImage;
+                    };
+                  }
+                ];
+          }
+        );
+    }
+  );
+
   config = hostName:
-    lib.nixosSystem {
+    libExt.nixosSystemExtended {
       inherit system;
 
       specialArgs =

hosts/niximg.nix

@@ -1,13 +0,0 @@
-{ unstableModulesPath, ... }: {
-  imports = [
-    # passwd is nixos by default
-    ../users/nixos
-    # passwd is empty by default
-    ../users/root
-    "${unstableModulesPath}/installer/cd-dvd/iso-image.nix"
-  ];
-
-  isoImage.makeEfiBootable = true;
-  isoImage.makeUsbBootable = true;
-  networking.networkmanager.enable = true;
-}

shell/default.nix

@@ -12,7 +12,7 @@ let
 
   flk = pkgs.writeShellScriptBin "flk" ''
     if [[ -z "$1" ]]; then
-      echo "Usage: $(basename "$0") [ iso | up | install {host} | {host} [switch|boot|test] | home {host} {user} [switch] ]"
+      echo "Usage: $(basename "$0") [ up | iso {host} | install {host} | {host} [switch|boot|test] | home {host} {user} [switch] ]"
     elif [[ "$1" == "up" ]]; then
       mkdir -p $DEVSHELL_ROOT/up
       hostname=$(hostname)
@@ -24,7 +24,7 @@ let
     git add -f $DEVSHELL_ROOT/up/$hostname
     git add -f $DEVSHELL_ROOT/hosts/up-$hostname.nix
     elif [[ "$1" == "iso" ]]; then
-      nix build $DEVSHELL_ROOT#nixosConfigurations.niximg.${build}.isoImage "${"\${@:2}"}"
+      nix build $DEVSHELL_ROOT#nixosConfigurations.$2.${build}.iso "${"\${@:3}"}"
     elif [[ "$1" == "install" ]]; then
       sudo nixos-install --flake "$DEVSHELL_ROOT#$2" "${"\${@:3}"}"
     elif [[ "$1" == "home" ]]; then