#!/bin/bash

kernel_version="6.7.6"
zen_version="zen1"
source_url="https://github.com/zen-kernel/zen-kernel/archive/refs/tags/v${kernel_version}-${zen_version}.tar.gz"
source_file="v${kernel_version}-${zen_version}.tar.gz"

is_package_installed() {
    dnf list installed "$1" &> /dev/null
    return $?
}

if [ -f "SOURCES/${source_file}" ]; then
    rm -f "SOURCES/${source_file}"
fi

for dir in BUILD BUILDROOT RPMS SOURCES SPECS SRPMS; do
    if [ ! -d "$dir" ]; then
        mkdir "$dir"
    fi
done

required_packages=(gcc make flex bison ncurses-devel elfutils-libelf-devel openssl openssl-devel clang llvm lld rpm-build redhat-rpm-config rpmdevtools dwarves)

for package in "${required_packages[@]}"; do
    if ! is_package_installed "$package"; then
        sudo dnf install -y "$package"
    fi
done

if [ ! -f "SOURCES/${source_file}" ]; then
    wget -P SOURCES/ "${source_url}"
fi

rpmbuild -ba --define "_topdir $PWD" SPECS/linux-zen.spec