mirror of
https://github.com/parchlinux/calamares.git
synced 2025-07-04 21:05:37 -04:00
340 lines
8.6 KiB
C++
340 lines
8.6 KiB
C++
/* === This file is part of Calamares - <https://github.com/calamares> ===
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*
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* SPDX-FileCopyrightText: 2014 Teo Mrnjavac <teo@kde.org>
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* SPDX-FileCopyrightText: 2017-2018 Adriaan de Groot <groot@kde.org>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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*
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* Calamares is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Calamares is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Calamares. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#include "Yaml.h"
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#include "utils/Logger.h"
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#include <QByteArray>
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#include <QFile>
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#include <QFileInfo>
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#include <QRegExp>
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void
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operator>>( const YAML::Node& node, QStringList& v )
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{
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for ( size_t i = 0; i < node.size(); ++i )
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{
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v.append( QString::fromStdString( node[ i ].as< std::string >() ) );
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}
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}
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namespace CalamaresUtils
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{
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const QRegExp _yamlScalarTrueValues = QRegExp( "true|True|TRUE|on|On|ON" );
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const QRegExp _yamlScalarFalseValues = QRegExp( "false|False|FALSE|off|Off|OFF" );
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QVariant
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yamlToVariant( const YAML::Node& node )
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{
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switch ( node.Type() )
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{
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case YAML::NodeType::Scalar:
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return yamlScalarToVariant( node );
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case YAML::NodeType::Sequence:
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return yamlSequenceToVariant( node );
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case YAML::NodeType::Map:
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return yamlMapToVariant( node );
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case YAML::NodeType::Null:
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case YAML::NodeType::Undefined:
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return QVariant();
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}
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// NOTREACHED
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return QVariant();
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}
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QVariant
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yamlScalarToVariant( const YAML::Node& scalarNode )
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{
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std::string stdScalar = scalarNode.as< std::string >();
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QString scalarString = QString::fromStdString( stdScalar );
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if ( _yamlScalarTrueValues.exactMatch( scalarString ) )
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{
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return QVariant( true );
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}
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if ( _yamlScalarFalseValues.exactMatch( scalarString ) )
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{
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return QVariant( false );
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}
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if ( QRegExp( "[-+]?\\d+" ).exactMatch( scalarString ) )
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{
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return QVariant( scalarString.toLongLong() );
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}
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if ( QRegExp( "[-+]?\\d*\\.?\\d+" ).exactMatch( scalarString ) )
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{
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return QVariant( scalarString.toDouble() );
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}
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return QVariant( scalarString );
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}
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QVariantList
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yamlSequenceToVariant( const YAML::Node& sequenceNode )
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{
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QVariantList vl;
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for ( YAML::const_iterator it = sequenceNode.begin(); it != sequenceNode.end(); ++it )
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{
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vl << yamlToVariant( *it );
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}
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return vl;
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}
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QVariantMap
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yamlMapToVariant( const YAML::Node& mapNode )
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{
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QVariantMap vm;
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for ( YAML::const_iterator it = mapNode.begin(); it != mapNode.end(); ++it )
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{
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vm.insert( QString::fromStdString( it->first.as< std::string >() ), yamlToVariant( it->second ) );
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}
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return vm;
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}
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QStringList
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yamlToStringList( const YAML::Node& listNode )
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{
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QStringList l;
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listNode >> l;
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return l;
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}
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void
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explainYamlException( const YAML::Exception& e, const QByteArray& yamlData, const char* label )
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{
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cWarning() << "YAML error " << e.what() << "in" << label << '.';
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explainYamlException( e, yamlData );
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}
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void
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explainYamlException( const YAML::Exception& e, const QByteArray& yamlData, const QString& label )
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{
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cWarning() << "YAML error " << e.what() << "in" << label << '.';
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explainYamlException( e, yamlData );
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}
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void
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explainYamlException( const YAML::Exception& e, const QByteArray& yamlData )
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{
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if ( ( e.mark.line >= 0 ) && ( e.mark.column >= 0 ) )
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{
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// Try to show the line where it happened.
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int linestart = 0;
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for ( int linecount = 0; linecount < e.mark.line; ++linecount )
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{
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linestart = yamlData.indexOf( '\n', linestart );
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// No more \ns found, weird
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if ( linestart < 0 )
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{
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break;
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}
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linestart += 1; // Skip that \n
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}
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int lineend = linestart;
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if ( linestart >= 0 )
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{
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lineend = yamlData.indexOf( '\n', linestart );
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if ( lineend < 0 )
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{
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lineend = yamlData.length();
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}
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}
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int rangestart = linestart;
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int rangeend = lineend;
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// Adjust range (linestart..lineend) so it's not too long
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if ( ( linestart >= 0 ) && ( e.mark.column > 30 ) )
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{
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rangestart += ( e.mark.column - 30 );
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}
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if ( ( linestart >= 0 ) && ( rangeend - rangestart > 40 ) )
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{
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rangeend = rangestart + 40;
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}
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if ( linestart >= 0 )
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{
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cWarning() << "offending YAML data:" << yamlData.mid( rangestart, rangeend - rangestart ).constData();
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}
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}
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}
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QVariantMap
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loadYaml( const QFileInfo& fi, bool* ok )
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{
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return loadYaml( fi.absoluteFilePath(), ok );
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}
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QVariantMap
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loadYaml( const QString& filename, bool* ok )
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{
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if ( ok )
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{
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*ok = false;
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}
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QFile yamlFile( filename );
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QVariant yamlContents;
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if ( yamlFile.exists() && yamlFile.open( QFile::ReadOnly | QFile::Text ) )
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{
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QByteArray ba = yamlFile.readAll();
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try
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{
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YAML::Node doc = YAML::Load( ba.constData() );
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yamlContents = CalamaresUtils::yamlToVariant( doc );
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}
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catch ( YAML::Exception& e )
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{
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explainYamlException( e, ba, filename );
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return QVariantMap();
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}
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}
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if ( yamlContents.isValid() && !yamlContents.isNull() && yamlContents.type() == QVariant::Map )
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{
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if ( ok )
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{
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*ok = true;
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}
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return yamlContents.toMap();
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}
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return QVariantMap();
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}
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/// @brief Convenience function writes @p indent times four spaces
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static void
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writeIndent( QFile& f, int indent )
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{
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while ( indent-- > 0 )
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{
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f.write( " " );
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}
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}
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// forward declaration
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static bool dumpYaml( QFile& f, const QVariantMap& map, int indent );
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// It's a quote
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static const char quote[] = "\"";
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static const char newline[] = "\n";
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/// @brief Recursive helper to dump a single value
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static void
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dumpYamlElement( QFile& f, const QVariant& value, int indent )
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{
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if ( value.type() == QVariant::Type::Bool )
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{
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f.write( value.toBool() ? "true" : "false" );
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}
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else if ( value.type() == QVariant::Type::String )
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{
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f.write( quote );
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f.write( value.toString().toUtf8() );
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f.write( quote );
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}
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else if ( value.type() == QVariant::Type::Int )
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{
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f.write( QString::number( value.toInt() ).toUtf8() );
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}
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else if ( value.type() == QVariant::Type::LongLong )
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{
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f.write( QString::number( value.toLongLong() ).toUtf8() );
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}
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else if ( value.type() == QVariant::Type::Double )
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{
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f.write( QString::number( value.toDouble(), 'f', 2 ).toUtf8() );
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}
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else if ( value.canConvert( QVariant::Type::ULongLong ) )
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{
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// This one needs to be *after* bool, int, double to avoid this branch
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// .. grabbing those convertible types un-necessarily.
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f.write( QString::number( value.toULongLong() ).toUtf8() );
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}
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else if ( value.type() == QVariant::Type::List )
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{
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int c = 0;
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for ( const auto& it : value.toList() )
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{
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++c;
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f.write( newline );
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writeIndent( f, indent + 1 );
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f.write( "- " );
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dumpYamlElement( f, it, indent + 1 );
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}
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if ( !c ) // i.e. list was empty
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{
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f.write( "[]" );
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}
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}
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else if ( value.type() == QVariant::Type::Map )
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{
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f.write( newline );
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dumpYaml( f, value.toMap(), indent + 1 );
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}
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else
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{
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f.write( "<" );
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f.write( value.typeName() );
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f.write( ">" );
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}
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}
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/// @brief Recursive helper to dump @p map to file
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static bool
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dumpYaml( QFile& f, const QVariantMap& map, int indent )
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{
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for ( auto it = map.cbegin(); it != map.cend(); ++it )
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{
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writeIndent( f, indent );
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f.write( quote );
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f.write( it.key().toUtf8() );
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f.write( quote );
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f.write( ": " );
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dumpYamlElement( f, it.value(), indent );
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f.write( newline );
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}
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return true;
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}
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bool
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saveYaml( const QString& filename, const QVariantMap& map )
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{
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QFile f( filename );
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if ( !f.open( QFile::WriteOnly ) )
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{
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return false;
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}
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f.write( "# YAML dump\n---\n" );
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return dumpYaml( f, map, 0 );
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}
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} // namespace CalamaresUtils
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