package rosa

import "hakurei.app/internal/pkg"

const kernelVersion = "6.12.76"

var kernelSource = pkg.NewHTTPGetTar(
	nil, "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
		"snapshot/linux-"+kernelVersion+".tar.gz",
	mustDecode("h0UATNznQbzplvthAqNLjVF-DJQHzGyhiy4za-9Ig9tOIpnoH9mWHbEjASV6lOl2"),
	pkg.TarGzip,
)

func (t Toolchain) newKernelSource() (pkg.Artifact, string) {
	return t.New("kernel-"+kernelVersion+"-src", 0, nil, nil, nil, `
mkdir -p /work/usr/src/
cp -r /usr/src/linux /work/usr/src/
chmod -R +w /work/usr/src/linux/
`, pkg.Path(AbsUsrSrc.Append("linux"), false, kernelSource)), kernelVersion
}
func init() {
	artifactsM[KernelSource] = Metadata{
		f: Toolchain.newKernelSource,

		Name:        "kernel-source",
		Description: "a writable kernel source tree installed to /usr/src/linux",
		Website:     "https://kernel.org/",
	}
}

func (t Toolchain) newKernelHeaders() (pkg.Artifact, string) {
	return t.NewPackage("kernel-headers", kernelVersion, kernelSource, &PackageAttr{
		Flag: TEarly,
	}, &MakeHelper{
		SkipConfigure: true,

		SkipCheck: true,
		Make: []string{
			"-f /usr/src/kernel-headers/Makefile",
			"O=/tmp/kbuild",
			"LLVM=1",
			`HOSTLDFLAGS="${LDFLAGS:-''}"`,
			"INSTALL_HDR_PATH=/work/system",
			"headers_install",
		},
		Install: "# headers installed during make",
	},
		Rsync,
	), kernelVersion
}
func init() {
	artifactsM[KernelHeaders] = Metadata{
		f: Toolchain.newKernelHeaders,

		Name:        "kernel-headers",
		Description: "an installation of kernel headers",
		Website:     "https://kernel.org/",
	}
}

func (t Toolchain) newKernel() (pkg.Artifact, string) {
	return t.NewPackage("kernel", kernelVersion, kernelSource, &PackageAttr{
		Env: []string{
			"PATH=/system/sbin",
		},
		ScriptEarly: `
install -Dm0400 \
	/usr/src/.config \
	/tmp/kbuild/.config
install -Dm0500 \
	/usr/src/.installkernel \
	/sbin/installkernel
`,

		Paths: []pkg.ExecPath{
			pkg.Path(AbsUsrSrc.Append(
				".config",
			), false, pkg.NewFile(".config", kernelConfig)),
			pkg.Path(AbsUsrSrc.Append(
				".installkernel",
			), false, pkg.NewFile("installkernel", []byte(`#!/bin/sh -e
echo "Installing linux $1..."
cp -av "$2" "$4"
cp -av "$3" "$4"
`))),
		},

		Flag: TExclusive,
	}, &MakeHelper{
		OmitDefaults:  true,
		SkipConfigure: true,

		// Build, install, and boot kernel before running kselftest on it.
		SkipCheck: true,

		Make: []string{
			"-f /usr/src/kernel/Makefile",
			"O=/tmp/kbuild",

			"LLVM=1",
			"KBUILD_BUILD_VERSION='1-Rosa'",
			"KBUILD_BUILD_TIMESTAMP='2106-02-07 06:28:15 UTC'",
			"KBUILD_BUILD_USER=kbuild",
			"KBUILD_BUILD_HOST=localhost",
			"all",
		},
		Install: `
make \
	"-j$(nproc)" \
	-f /usr/src/kernel/Makefile \
	O=/tmp/kbuild \
	LLVM=1 \
	INSTALL_PATH=/work \
	install \
	INSTALL_MOD_PATH=/work \
	modules_install
rm -v /work/lib/modules/` + kernelVersion + `/build
`,
	},
		Flex,
		Bison,
		M4,
		Tar,
		Perl,
		BC,
		Sed,
		Gawk,
		Coreutils,
		Diffutils,
		Python,

		XZ,
		Zlib,
		Gzip,
		Bzip2,
		Zstd,
		Kmod,
		Elfutils,
		OpenSSL,
		UtilLinux,
		KernelHeaders,
	), kernelVersion
}
func init() {
	artifactsM[Kernel] = Metadata{
		f: Toolchain.newKernel,

		Name:        "kernel",
		Description: "the generic Rosa OS linux kernel",
		Website:     "https://kernel.org/",

		ID: 375621,
	}
}

func (t Toolchain) newGenInitCPIO() (pkg.Artifact, string) {
	return t.New("gen_init_cpio-"+kernelVersion, 0, nil, nil, nil, `
mkdir -p /work/system/bin/
cc -o /work/system/bin/gen_init_cpio /usr/src/linux/usr/gen_init_cpio.c
`, pkg.Path(AbsUsrSrc.Append("linux"), false, kernelSource)), kernelVersion
}
func init() {
	artifactsM[GenInitCPIO] = Metadata{
		f: Toolchain.newGenInitCPIO,

		Name:        "gen_init_cpio",
		Description: "a program in the kernel source tree for creating initramfs archive",
	}
}