package rosa

import (
	"slices"

	"hakurei.app/internal/pkg"
)

// newKernel is a helper for interacting with Kbuild.
func (t Toolchain) newKernel(
	script string,
	extra ...pkg.Artifact,
) pkg.Artifact {
	const (
		version  = "6.18.5"
		checksum = "-V1e1WWl7HuePkmm84sSKF7nLuHfUs494uNMzMqXEyxcNE_PUE0FICL0oGWn44mM"
	)
	return t.New("kernel-"+version, slices.Concat([]pkg.Artifact{
		t.NewMake(),
	}, extra), nil, nil, `
export LLVM=1
export HOSTCFLAGS="${ROSA_CFLAGS}"
export HOSTLDFLAGS="${LDFLAGS}"
chmod -R +w /usr/src/linux && cd /usr/src/linux
`+script, pkg.Path(AbsUsrSrc.Append("linux"), true, pkg.NewHTTPGetTar(
		nil,
		"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
			"snapshot/linux-"+version+".tar.gz",
		mustDecode(checksum),
		pkg.TarGzip,
	)))
}

// NewKernelHeaders returns a [pkg.Artifact] containing kernel headers.
func (t Toolchain) NewKernelHeaders() pkg.Artifact {
	return t.newKernel(`
make "-j$(nproc)" \
	INSTALL_HDR_PATH=/work/system \
	headers_install
`, t.NewRsync())
}