Simple Compressor using QArchive (In Memory)

Please refer the full class documentation here.

This simple example compresses a set of files and directories within memory.(Directories are recursively added)

main.cpp

#include <QCoreApplication>
#include <QDebug>
#include <QArchive/QArchive>

int main(int argc, char** argv)
{
    if(ac < 2) {
        qDebug() << "Usage: " << av[0] << " [ARCHIVE PATH] [FILE(S)]";
        return 0;
    }
    using QArchive::MemoryCompressor;    
    
    QCoreApplication app(ac, av);
    QString ArchivePath = QString(av[1]);
    QStringList Files;
    
    for(auto i = 2; i < ac ; ++i){
            QString file = QString(av[i]);
            Files.append(file);
    }

    /* Construct MemoryCompressor Object. */
    MemoryCompressor Compressor(QArchive::SevenZipFormat);
    Compressor.addFiles(Files);
    
    QObject::connect(&Compressor , &MemoryCompressor::finished , [&](QBuffer *archive){
    qInfo() << "Compressed File(s) Successfully!";
    qDebug() << "Compressed Archive Size:: " << archive->size();
    
    QFile out(ArchivePath);
    archive->open(QIODevice::ReadOnly);
    if(out.open(QIODevice::WriteOnly)) {
        char buff[1024];
        auto len = archive->read(buff, sizeof(buff));
        while (len > 0) {
            file.write(buff, len);
            len = archive->read(buff, sizeof(buff));
        }
    }
    archive->close();
    out.close();
 
    archive->deleteLater();
    app.quit();
    return;
    });
    QObject::connect(&Compressor , &MemoryCompressor::error ,
    [&](short code , QString file){
        qInfo() << "An error has occured ::" 
        << QArchive::errorCodeToString(code) 
        << "::" 
        << file;
        app.quit();
        return;
    });

    Compressor.start();
    return app.exec();
}

CMakeLists.txt

CMAKE_MINIMUM_REQUIRED(VERSION 3.17)
project(MemoryCompressor)
    
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)

# Assuming you installed QArchive to system.        
find_package(QArchive)
    
# Include Directories.
include_directories(.)
include_directories(${CMAKE_BINARY_DIR})

add_executable(MemoryCompressor main.cpp)
target_link_libraries(MemoryCompressor PRIVATE QArchive)

Compilation and Execution

 $ mkdir build
 $ cd build
 $ cmake ..
 $ make -j$(nproc)
 $ ./MemoryCompressor

This Program is created in the examples tree on the official repo.