// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

// Package extensions contains Talos extensions specific API.
package extensions

import "path/filepath"

// AllowedPaths lists paths allowed in the extension images.
var AllowedPaths = []string{
	"/etc/cri/conf.d",
	"/lib/firmware",
	"/lib/modules",
	// The glibc loader is required by glibc dynamic binaries.
	"/lib64/ld-linux-x86-64.so.2",
	// /sbin/ldconfig is required by the nvidia container toolkit.
	"/sbin/ldconfig",
	"/usr/lib/udev/rules.d",
	"/usr/local",
	// glvnd, egl and vulkan are needed for OpenGL/Vulkan.
	"/usr/share/glvnd",
	"/usr/share/egl",
	"/etc/vulkan",
}

// Extension represents unpacked extension in the filesystem.
type Extension struct {
	Manifest Manifest

	directory  string
	rootfsPath string
}

// RootfsPath returns the path to the rootfs directory.
func (ext *Extension) RootfsPath() string {
	return ext.rootfsPath
}

// Directory returns the directory name of the extension.
func (ext *Extension) Directory() string {
	return ext.directory
}

// New creates a new extension from the rootfs path, directory name and manifest.
func New(rootfsPath, directory string, manifest Manifest) *Extension {
	extension := &Extension{
		Manifest: manifest,

		rootfsPath: rootfsPath,
		directory:  directory,
	}

	if extension.directory == "" {
		extension.directory = filepath.Base(rootfsPath)
	}

	return extension
}