Add function to make paths from flake root

No more ../../../../../../

hosts/bekkalokk/services/gitea/default.nix

@@ -1,4 +1,4 @@
-{ config, values, pkgs, lib, ... }:
+{ config, values, fp, pkgs, lib, ... }:
 let
   cfg = config.services.gitea;
   domain = "git.pvv.ntnu.no";
@@ -173,8 +173,8 @@ in {
     };
 
     script = let
-      logo-svg = ../../../../assets/logo_blue_regular.svg;
-      logo-png = ../../../../assets/logo_blue_regular.png;
+      logo-svg = fp /assets/logo_blue_regular.svg;
+      logo-png = fp /assets/logo_blue_regular.png;
       extraLinks = pkgs.writeText "gitea-extra-links.tmpl" ''
         <a class="item" href="https://www.pvv.ntnu.no/">PVV</a>
         <a class="item" href="https://wiki.pvv.ntnu.no/">Wiki</a>

hosts/bekkalokk/services/mediawiki/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, config, values, pkgs-unstable, ... }: let
+{ pkgs, lib, fp, config, values, pkgs-unstable, ... }: let
   cfg = config.services.mediawiki;
 
   # "mediawiki"
@@ -210,8 +210,8 @@ in {
         '';
       };
 
-      "= /PNG/PVV-logo.svg".alias = ../../../../assets/logo_blue_regular.svg;
-      "= /PNG/PVV-logo.png".alias = ../../../../assets/logo_blue_regular.png;
+      "= /PNG/PVV-logo.svg".alias = fp /assets/logo_blue_regular.svg;
+      "= /PNG/PVV-logo.png".alias = fp /assets/logo_blue_regular.png;
       "= /favicon.ico".alias = pkgs.runCommandLocal "mediawiki-favicon.ico" {
         buildInputs = with pkgs; [ imagemagick ];
       } ''
@@ -219,7 +219,7 @@ in {
           -resize x64 \
           -gravity center \
           -crop 64x64+0+0 \
-          ${../../../../assets/logo_blue_regular.png} \
+          ${fp /assets/logo_blue_regular.png} \
           -flatten \
           -colors 256 \
           -background transparent \

hosts/bekkalokk/services/webmail/snappymail.nix

@@ -1,8 +1,8 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, fp, pkgs, ... }:
 let
   cfg = config.services.snappymail;
 in {
-  imports = [ ../../../../modules/snappymail.nix ];
+  imports = [ (fp /modules/snappymail.nix) ];
 
   services.snappymail = {
     enable = true;