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/*
* basic.hh - Definition of the abstract Horizon Image Creation backend
* image, the image processing utilities for
* Project Horizon
*
* Copyright (c) 2020 Adélie Linux and contributors. All rights reserved.
* This code is licensed under the AGPL 3.0 license, as noted in the
* LICENSE-code file in the root directory of this repository.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
#pragma once
#include <functional>
#include <map>
#include <string>
#include <vector>
namespace Horizon {
namespace Image {
using std::string;
class BasicBackend {
public:
/*! Create the backend object.
* @param _ir_dir The intermediate directory the image should contain.
* @param _out_path The path to write the image.
* @param _opts Options, if any.
*/
BasicBackend(const string &_ir_dir, const string &_out_path,
const std::map<string, string> &_opts = {}) :
ir_dir{_ir_dir}, out_path{_out_path}, opts{_opts} {};
virtual ~BasicBackend() {};
/*! Prepare for creating the image.
* @returns 0 if preparation succeeded; otherwise, an error code.
*/
virtual int prepare();
/*! Create the image.
* @returns 0 if the image is created successfully; otherwise, an error
* code which explains the failure.
*/
virtual int create() = 0;
/*! Finalise the image.
* @returns 0 if the image is finalised; otherwise, an error code.
*/
virtual int finalise();
/*! The intermediate directory which contains the sysroot the image
* should contain. */
const string ir_dir;
/*! The path at which to write the image. */
const string out_path;
/*! Backend-specific configuration options. */
const std::map<string, string> opts;
};
struct BackendDescriptor {
string type_code;
string description;
std::function<BasicBackend *(const string &, const string &,
const std::map<string, string> &)> creation_fn;
};
class BackendManager {
public:
/*! Returns a list of available backends. */
static const std::vector<BackendDescriptor> available_backends();
/*! Register a new backend. */
static void register_backend(BackendDescriptor desc);
};
}
}
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