calamares/src/libcalamares/utils/Yaml.h
2020-07-09 10:45:28 +02:00

97 lines
3.3 KiB
C++

/* === This file is part of Calamares - <https://github.com/calamares> ===
*
* SPDX-FileCopyrightText: 2014 Teo Mrnjavac <teo@kde.org>
* SPDX-FileCopyrightText: 2017-2018 Adriaan de Groot <groot@kde.org>
* SPDX-License-Identifier: GPL-3.0-or-later
*
*
* Calamares is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Calamares is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Calamares. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
/*
* YAML conversions and YAML convenience header.
*
* Includes the system YAMLCPP headers without warnings (by switching off
* the expected warnings) and provides a handful of methods for
* converting between YAML and QVariant.
*/
#ifndef UTILS_YAML_H
#define UTILS_YAML_H
#include <QStringList>
#include <QVariant>
#include <QVariantList>
#include <QVariantMap>
class QByteArray;
class QFileInfo;
// The yaml-cpp headers are not C++11 warning-proof, especially
// with picky compilers like Clang 8. Since we use Clang for the
// find-all-the-warnings case, switch those warnings off for
// the we-can't-change-them system headers.
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
#pragma clang diagnostic ignored "-Wshadow"
#pragma clang diagnostic ignored "-Wfloat-equal"
#endif
#include <yaml-cpp/yaml.h>
#ifdef __clang__
#pragma clang diagnostic pop
#endif
/// @brief Appends all the elements of @p node to the string list @p v
void operator>>( const YAML::Node& node, QStringList& v );
namespace CalamaresUtils
{
/**
* Loads a given @p filename and returns the YAML data
* as a QVariantMap. If filename doesn't exist, or is
* malformed in some way, returns an empty map and sets
* @p *ok to false. Otherwise sets @p *ok to true.
*/
QVariantMap loadYaml( const QString& filename, bool* ok = nullptr );
/** Convenience overload. */
QVariantMap loadYaml( const QFileInfo&, bool* ok = nullptr );
QVariant yamlToVariant( const YAML::Node& node );
QVariant yamlScalarToVariant( const YAML::Node& scalarNode );
QVariantList yamlSequenceToVariant( const YAML::Node& sequenceNode );
QVariantMap yamlMapToVariant( const YAML::Node& mapNode );
/// @brief Returns all the elements of @p listNode in a StringList
QStringList yamlToStringList( const YAML::Node& listNode );
/// @brief Save a @p map to @p filename as YAML
bool saveYaml( const QString& filename, const QVariantMap& map );
/**
* Given an exception from the YAML parser library, explain
* what is going on in terms of the data passed to the parser.
* Uses @p label when labeling the data source (e.g. "netinstall data")
*/
void explainYamlException( const YAML::Exception& e, const QByteArray& data, const char* label );
void explainYamlException( const YAML::Exception& e, const QByteArray& data, const QString& label );
void explainYamlException( const YAML::Exception& e, const QByteArray& data );
} // namespace CalamaresUtils
#endif