fix(core): don't add authorized_keys when it already has it

Author: charliie-dev

modules/core.nix

@@ -51,7 +51,11 @@ in
         if [ ! -f ${config.home.homeDirectory}/.ssh/authorized_keys ]; then
           touch ${config.home.homeDirectory}/.ssh/authorized_keys
         fi
-         (cat ${config.home.homeDirectory}/.ssh/id_ed25519.pub) >> ${config.home.homeDirectory}/.ssh/authorized_keys
+        if grep -q "charles@home-manager" "${config.home.homeDirectory}/.ssh/authorized_keys"; then
+          exit 0
+        else
+          (cat ${config.home.homeDirectory}/.ssh/id_ed25519.pub) >> ${config.home.homeDirectory}/.ssh/authorized_keys
+        fi
       '';
       gpgFixup = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
         if [ ! -d ${config.xdg.dataHome}/gnupg ]; then