netboot.xyz/roles/netbootxyz/templates/menu/utils-efi.ipxe.j2

#!ipxe

:utils_menu
menu Utilities
item --gap Utilities:
{% for key, value in utilitiesefi.items() | sort(attribute='1.name') %}
{% if value.enabled %}
item {{ key }} ${space} {{ value.name }}
{% endif %}
{% endfor %}
item --gap netboot.xyz tools:
item cmdline ${space} Kernel cmdline params: [${cmdline}]
item nbxyz_custom_url ${space} Set custom menu [url: ${custom_url}]
item nbxyz_custom_github ${space} Set Github username [user: ${github_user}]
item nbxyz ${space} netboot.xyz endpoints
choose --default ${menu} menu || goto utils_exit
echo ${cls}
goto ${menu} ||
chain ${menu}.ipxe || goto utils_exit
goto utils_exit

{% for key, value in utilitiesefi.items() | sort %}
{% if value.enabled | bool and value.type == "direct" %}
:{{ key }}
imgfree
kernel {{ value.kernel }}
initrd {{ value.initrd }}
boot
goto utils_exit
{% endif %}
{% endfor %}

:cmdline
echo If you want to change the default kernel command line parameters
echo you can override the defaults here.
echo
echo Currently set to: ${cmdline}
echo
echo -n Enter cmdline parameters: ${} && read cmdline
goto utils_menu

:nbxyz_custom_url
echo If you have a customized menu you would like to load into netboot.xyz
echo set the base path url to your custom ipxe files here. 
echo It will look for custom.ipxe in that path as the entry point.
echo
echo -n Please enter your custom http url here: ${} && read custom_url
goto utils_menu

:nbxyz_custom_github
echo Make sure you have a fork of https://github.com/netbootxyz/netboot.xyz-custom.
echo You can then customize your fork as needed and set up your own custom options.
echo Once your username is set, a custom option will appear on the main menu.
echo
echo -n Please enter your Github username: ${} && read github_user
goto utils_menu

:utils_exit
clear menu
exit 0