187 lines
6.4 KiB
C++
187 lines
6.4 KiB
C++
#include "./alpmdatabase.h"
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#include "./upgradelookup.h"
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#include "./alpmpackage.h"
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#include "./utilities.h"
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#include <c++utilities/misc/memory.h>
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#include <KTar>
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#include <KArchiveDirectory>
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#include <QList>
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#include <QJsonObject>
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#include <QtConcurrent>
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#include <iostream>
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using namespace std;
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namespace RepoIndex {
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using namespace Utilities;
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/*!
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* \class AlpmDatabase
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* \brief The AlpmDatabase class wraps an ALPM data base struct and holds additional meta information.
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*
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* All packages returned by the AlpmDatabase class are AlpmPackage instances.
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*/
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class LoadPackage
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{
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public:
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LoadPackage(AlpmDatabase *database, PackageOrigin origin) :
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m_db(database),
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m_origin(origin)
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{}
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void operator()(const QPair<QString, QList<QByteArray> > &description)
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{
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m_db->addPackageFromDescription(description.first, description.second, m_origin);
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}
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private:
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AlpmDatabase *const m_db;
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const PackageOrigin m_origin;
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};
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void AlpmDatabase::loadDescriptions(QList<QPair<QString, QList<QByteArray> > > &descriptions)
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{
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QFileInfo pathInfo(databasePath());
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if(pathInfo.isDir()) {
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static const QStringList relevantFiles = QStringList() << QStringLiteral("desc") << QStringLiteral("files");
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QDir dbDir(databasePath());
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QStringList pkgDirNames = dbDir.entryList(QDir::Dirs | QDir::Readable | QDir::Executable | QDir::NoDotAndDotDot);
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descriptions.reserve(pkgDirNames.size());
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for(QString &pkgDirName : pkgDirNames) {
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if(dbDir.cd(pkgDirName)) {
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Utilities::stripVersion(pkgDirName);
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const QStringList descFileNames = dbDir.entryList(relevantFiles, QDir::Files | QDir::Readable | QDir::NoDotAndDotDot);
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QList<QByteArray> descData;
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descData.reserve(descFileNames.size());
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for(const QString &descFileName : descFileNames) {
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QFile descFile(dbDir.absoluteFilePath(descFileName));
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if(descFile.open(QFile::ReadOnly)) {
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descData << descFile.readAll();
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} else {
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// TODO: error handling (can't open pkg file)
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}
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}
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if(!descData.isEmpty()) {
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descriptions << qMakePair(pkgDirName, descData);
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}
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dbDir.cdUp();
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} else {
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// TODO: error handling (can't enter pkg dir)
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}
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}
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} else if(pathInfo.isFile()) {
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KTar tar(databasePath());
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const KArchiveDirectory *dbDir;
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if(tar.open(QIODevice::ReadOnly) && (dbDir = tar.directory())) {
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QStringList pkgDirNames = dbDir->entries();
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descriptions.reserve(pkgDirNames.size());
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for(QString &pkgDirName : pkgDirNames) {
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if(const auto *pkgEntry = dbDir->entry(pkgDirName)) {
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if(pkgEntry->isDirectory()) {
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Utilities::stripVersion(pkgDirName);
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const auto *pkgDir = static_cast<const KArchiveDirectory *>(pkgEntry);
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const QStringList descFileNames = pkgDir->entries();
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QList<QByteArray> descData;
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descData.reserve(descFileNames.size());
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for(const QString &descFileName : descFileNames) {
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if(const auto *descEntry = pkgDir->entry(descFileName)) {
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if(descEntry->isFile()) {
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descData << static_cast<const KArchiveFile *>(descEntry)->data();
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} else {
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// there shouldn't be any subdirs
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}
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}
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}
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if(!descData.isEmpty()) {
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descriptions << qMakePair(pkgDirName, descData);
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}
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} else {
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// there shouldn't be any files
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}
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}
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}
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} else {
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// TODO: error handling (can't open sync db file)
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}
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} else {
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// TODO: error handling
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}
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}
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AlpmPackageLoader::AlpmPackageLoader(AlpmDatabase *repository, PackageOrigin origin)
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{
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repository->loadDescriptions(m_descriptions);
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m_future = QtConcurrent::map(m_descriptions, LoadPackage(repository, origin));
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}
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/*!
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* \brief Creates a new instance wrapping the specified database struct.
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*/
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AlpmDatabase::AlpmDatabase(const QString &name, const QString &dbPath, RepositoryUsage usage, SignatureLevel sigLevel, uint32 index, QObject *parent) :
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Repository(name, index, parent),
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m_dbPath(dbPath)
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{
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m_usage = usage;
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m_sigLevel = sigLevel;
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}
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AlpmPackageLoader *AlpmDatabase::init()
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{
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// set description, determine origin
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PackageOrigin origin;
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if(m_name.compare(QLatin1String("local"), Qt::CaseInsensitive) == 0) {
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m_description = QStringLiteral("The local database");
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origin = PackageOrigin::LocalDb;
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} else {
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if((m_usage & RepositoryUsage::Sync) || (m_usage & RepositoryUsage::Install) || (m_usage & RepositoryUsage::Upgrade)) {
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m_description = QStringLiteral("Sync database »%1«").arg(m_name);
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} else {
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m_description = QStringLiteral("Database »%1«").arg(m_name);
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}
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origin = PackageOrigin::SyncDb;
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}
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// initialization of packages is done concurrently via AlpmPackageLoader: ~ 4 sec
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return new AlpmPackageLoader(this, origin);
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// without concurrency: ~ 12 sec
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//QList<QPair<QString, QList<QByteArray> > > descriptions;
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//loadDescriptions(descriptions);
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//for(const auto &description : descriptions) {
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// addPackageFromDescription(description.first, description.second, origin);
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//}
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//return nullptr;
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}
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RepositoryType AlpmDatabase::type() const
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{
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return RepositoryType::AlpmDatabase;
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}
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PackageDetailAvailability AlpmDatabase::requestsRequired(PackageDetail packageDetail) const
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{
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switch(packageDetail) {
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case PackageDetail::Basics:
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case PackageDetail::Dependencies:
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case PackageDetail::PackageInfo:
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case PackageDetail::AllAvailable:
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return PackageDetailAvailability::Immediately;
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default:
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return PackageDetailAvailability::Never;
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}
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}
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std::unique_ptr<Package> AlpmDatabase::emptyPackage()
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{
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return make_unique<AlpmPackage>(this);
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}
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} // namespace Alpm
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