refactor: use $FLAKE instead of /home/mainUser...

common/home/bash/config/bashrc

@@ -1,6 +1,6 @@
 # Check git status of nix configs
 fetchNix() {(
-    cd ~/.nix || exit 1
+    cd "$FLAKE" || exit 1
     git fetch --all --quiet
     GIT=$(git -c color.status=always status |
             grep -v -e "On branch" \

common/home/git/default.nix

@@ -1,10 +1,4 @@
-{
-  config,
-  pkgs,
-  ...
-}: let
-  inherit (config.vars) mainUser;
-in {
+{pkgs, ...}: {
   programs = {
     git = {
       enable = true;
@@ -75,9 +69,10 @@ in {
       runtimeInputs = [git];
 
       text = ''
-        DIR=''${1:-"/home/${mainUser}/.nix"}
+        DIR=''${1:-"$FLAKE"}
+
+        cd "$DIR" || exit 1
 
-        cd "$DIR"
         git add flake.lock
         git commit -m 'chore: update flake.lock'
         git push