provide a default value for lib's nix_templater parameter to facilitate importing without flakes

add license: MIT

LICENSE.md

@@ -0,0 +1,18 @@
+Copyright 2025 @lassulus, Germany
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lib.nix

@@ -1,4 +1,7 @@
-{ pkgs, nix_templater }:
+{
+  pkgs,
+  nix_templater ? pkgs.callPackage ./pkgs/nix_templater { },
+}:
 {
   # placeholder to be substituted with the content of a secret file
   fileContents = file: {

tests/template.nix

@@ -17,14 +17,14 @@ in (nixpkgs.lib.nixos.runTest {
             ExecStartPre = "${legacyPackages.${system}.template_text {
               name = "test";
               text = ''
-                foo=${legacyPackages.${system}.fileContents secret_file}
+              public text
+              ${legacyPackages.${system}.fileContents secret_file}
               '';
               outPath = "./test";
             }}/bin/test";
-            environmentFile = "./test";
             ExecStart = pkgs.writeScript "test_file_got_templates" ''
               #!/bin/sh
-              env > ./env
+              cat ./test | grep -q 'secret'
             '';
           };
         };
@@ -35,8 +35,6 @@ in (nixpkgs.lib.nixos.runTest {
       start_all()
       print(machine.execute("uname -a"))
       machine.wait_for_unit("multi-user.target")
-      print(machine.succeed("cat /test"))
-      print(machine.succeed("cat /env"))
-      print(machine.succeed("cat /env | grep -q secret"))
+      print(machine.succeed("cat /test | grep -q secret"))
     '';
   })