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aptcache.cpp
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aptcache.cpp
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#include "aptcache.h"
#include <QDebug>
#include <QDirIterator>
#include <QRegularExpression>
#include "versionnumber.h"
AptCache::AptCache()
{
loadCacheFiles();
parseContent();
}
void AptCache::loadCacheFiles()
{
// Exclude Debian backports and MX testrepo and temp repos
const QString arch = getArch();
const QRegularExpression packagesFilter("(.*binary-" + arch
+ "_Packages)|"
"(.*binary-.*_Packages(?!.*debian_.*-backports_.*_Packages)"
"(?!.*mx_testrepo.*_test_.*_Packages)"
"(?!.*mx_repo.*_temp_.*_Packages))");
QDirIterator it(dir.path(), QDir::Files);
while (it.hasNext()) {
const QString fileName = it.next();
if (packagesFilter.match(fileName).hasMatch() && !readFile(fileName)) {
qWarning() << "Error reading cache file:" << fileName;
}
}
}
QMap<QString, PackageInfo> AptCache::getCandidates() const
{
return candidates;
}
// Return DEB_BUILD_ARCH format which differs from what 'arch' or currentCpuArchitecture return
QString AptCache::getArch()
{
static const QString arch = arch_names.value(QSysInfo::currentCpuArchitecture());
return arch;
}
void AptCache::parseContent()
{
QTextStream stream(&files_content);
QString line;
QString package;
QString version;
QString description;
QString architecture;
const QString arch = getArch();
const QRegularExpression re_arch(".*(" + arch + "|all).*");
bool match_arch = false;
// Code assumes Description: is the last matched line
while (stream.readLineInto(&line)) {
if (line.startsWith(QLatin1String("Package:"))) {
package = line.mid(9);
} else if (line.startsWith(QLatin1String("Architecture:"))) {
architecture = line.mid(14).trimmed();
match_arch = re_arch.match(architecture).hasMatch();
} else if (line.startsWith(QLatin1String("Version:"))) {
version = line.mid(9);
} else if (line.startsWith(QLatin1String("Description:"))) {
description = line.mid(13).trimmed();
if (match_arch) {
auto it = candidates.constFind(package);
if (it == candidates.constEnd() || VersionNumber(it->version) < VersionNumber(version)) {
candidates[package] = {version, description};
}
}
}
}
files_content.clear();
}
bool AptCache::readFile(const QString &file_name)
{
QFile file(dir.absoluteFilePath(file_name));
if (!file.open(QFile::ReadOnly)) {
qWarning() << "Could not open file: " << file.fileName();
return false;
}
files_content += QLatin1String("\n") + file.readAll();
file.close();
return true;
}