#!/bin/bash
#
# Purpose : Leave Wi-Fi to NetworkManager alone. archinstall's "copy ISO network
#           configuration" turns on iwd and systemd-networkd, so a machine set
#           up with iwctl from the Arch ISO can have them running alongside
#           NetworkManager, which CoreDesktop turns on. Then two services fight
#           over the Wi-Fi card: connections drop, or Wi-Fi is missing from
#           GNOME.
#
# This disables iwd and systemd-networkd without stopping them, so the network
# stays up until the next boot; after it, NetworkManager runs Wi-Fi and wired
# connections. iwd's saved Wi-Fi passwords don't carry over: choose the network
# once in GNOME's top-right menu.
#
# Changes nothing when NetworkManager isn't enabled, or when it is set up to
# use iwd itself (wifi.backend=iwd in /etc/NetworkManager/conf.d/).

systemctl is-enabled -q NetworkManager.service 2> /dev/null || exit 0
systemctl is-enabled -q iwd.service 2> /dev/null || exit 0

# Unset settings print commented out, so this matches only one someone set
if NetworkManager --print-config 2> /dev/null \
    | grep -qE '^[[:space:]]*wifi\.backend[[:space:]]*=[[:space:]]*iwd[[:space:]]*$'; then
  exit 0
fi

echo "Turning off iwd, so that NetworkManager runs Wi-Fi from the next restart..."
sudo systemctl disable iwd.service || exit 1

# archinstall turns systemd-networkd on with iwd. Its wait-online would hold up
# boot with nothing for it to wait for.
if systemctl is-enabled -q systemd-networkd.service 2> /dev/null; then
  echo "Turning off systemd-networkd, so that NetworkManager runs the network..."
  sudo systemctl disable systemd-networkd.service systemd-networkd.socket \
    systemd-networkd-wait-online.service || exit 1
fi

echo "After you restart, choose your Wi-Fi network in GNOME's top-right menu"
echo "and enter its password once. The network stays up until then."