new: output-template interpolates output values into config file

pkgs/output-template/default.nix

@@ -0,0 +1,34 @@
+{
+  fetchurl,
+  writeFennel,
+  fennel,
+  runCommand,
+  lua,
+  anoia,
+  linotify,
+  lualinux,
+  stdenv
+}:
+let name = "output-template";
+in stdenv.mkDerivation {
+  inherit name;
+  src = ./.;
+
+  buildInputs = [lua];
+  doCheck = true;
+
+  buildPhase = ''
+    cp -p ${writeFennel name {
+      packages = [
+        anoia
+        lualinux
+        linotify
+      ] ;
+      mainFunction = "run";
+    } ./output-template.fnl } ${name}
+  '';
+  checkPhase = "make check";
+  installPhase = ''
+    install -D ${name} $out/bin/${name}
+  '';
+}