#!/bin/bash

# SPDX-License-Identifier: MIT

set -x
set -e

unset LC_CTYPE
unset LANG

build_linux()
{
(
        test -d linux || git clone https://github.com/AsahiLinux/linux
        cd linux
        git fetch -a -t
        git reset --hard origin/asahi-wip; git clean -f -x -d &> /dev/null
        curl -sL https://raw.githubusercontent.com/AsahiLinux/PKGBUILDs/main/linux-asahi/config > .config
        make olddefconfig
        make -j `nproc` V=0 > /dev/null
        sudo make modules_install
        sudo make install
)
}

build_m1n1()
{
(
        test -d m1n1 || git clone --recursive https://github.com/AsahiLinux/m1n1
        cd m1n1
        git fetch -a -t
        git reset --hard origin/lina/gpu-wip; git clean -f -x -d &> /dev/null
        make -j `nproc`
)
}

build_uboot()
{
(
        test -d u-boot || git clone https://github.com/AsahiLinux/u-boot
        cd u-boot
        git fetch -a -t
        # For tag, see https://github.com/AsahiLinux/PKGBUILDs/blob/main/uboot-asahi/PKGBUILD
        git reset --hard origin/asahi; git clean -f -x -d &> /dev/null
        curl -s https://tg.st/u/0001-usb-request-on-8-bytes-for-USB_SPEED_FULL-bMaxPacket.patch | git am -
        make apple_m1_defconfig
        make -j `nproc`
)

        cat m1n1/build/m1n1.bin   `find linux/arch/arm64/boot/dts/apple/ -name \*.dtb` <(gzip -c u-boot/u-boot-nodtb.bin) > u-boot.bin
        sudo cp /boot/efi/m1n1/boot.bin /boot/efi/m1n1/`date +%Y%m%d%H%M`.bin
        sudo cp u-boot.bin /boot/efi/m1n1/boot.bin

}

mkdir -p build
cd build

sudo apt-get install -y build-essential bash git locales gcc-aarch64-linux-gnu libc6-dev device-tree-compiler imagemagick ccache eatmydata debootstrap pigz libncurses-dev qemu-user-static binfmt-support rsync git flex bison bc kmod cpio libncurses5-dev libelf-dev:native libssl-dev dwarves

build_linux
build_m1n1
build_uboot