feat: Add systemd service to auto-fetch Apple firmware and ensure its execution on first boot.

.github/workflows/iso.sh

@@ -3,10 +3,21 @@
 os=$(uname -s)
 case "$os" in
 	(Darwin)
-		true
+		echo -e "GET http://github.com HTTP/1.0\n\n" | nc github.com 80 > /dev/null 2>&1
+		if [ $? -eq 0 ]; then
+			true
+		else
+			echo "Please connect to the internet"
+			exit 1
+		fi
 		;;
 	(Linux)
-		true
+		if wget -q --spider --timeout=5 --tries=1 http://github.com >/dev/null 2>&1; then
+			true
+		else
+			echo "Please connect to the internet"
+			exit 1
+		fi
 		;;
 	(*)
 		echo "This script is meant to be run only on Linux or macOS"
@@ -14,15 +25,6 @@ case "$os" in
 		;;
 esac
 
-echo -e "GET http://github.com HTTP/1.0\n\n" | nc github.com 80 > /dev/null 2>&1
-
-if [ $? -eq 0 ]; then
-    true
-else
-    echo "Please connect to the internet"
-    exit 1
-fi
-
 set -e
 
 cd $HOME/Downloads

02_build_image.sh

@@ -18,6 +18,8 @@ touch "${IMAGE_PATH}"/ubuntu
 cp -r "${ROOT_PATH}"/files/preseed "${IMAGE_PATH}"/preseed
 cp "${ROOT_PATH}/files/grub/grub.cfg" "${IMAGE_PATH}"/isolinux/grub.cfg
 
+echo >&2 "===]> Info: Reset firmware flag for fresh boot... "
+rm -f "${CHROOT_PATH}/etc/get_apple_firmware_attempted" || true
 
 echo >&2 "===]> Info: Compress the chroot... "
 cd "${WORKING_PATH}"

files/chroot_build.sh

@@ -65,6 +65,12 @@ cat <<EOF | sudo tee /etc/NetworkManager/conf.d/99-network-t2-ncm.conf
 no-auto-default=t2_ncm
 EOF
 
+echo >&2 "===]> Info: Setup auto-fetch firmware service... "
+
+curl -s https://raw.githubusercontent.com/t2linux/wiki/refs/heads/master/docs/tools/get-apple-firmware.service -o /etc/systemd/system/get-apple-firmware.service
+
+systemctl enable get-apple-firmware.service
+
 echo >&2 "===]> Info: Cleanup the chroot environment... "
 
 truncate -s 0 /etc/machine-id || true