Since QDir & QDir::EntryList has some serious trouble with (MacOS) app-bundles, I ended up implementing the QDirIterator solution @Chris-Kawa suggested:
void copyAndReplaceFolderContents(const QString &fromDir, const QString &toDir, bool copyAndRemove = false) {
QDirIterator it(fromDir, QDirIterator::Subdirectories);
QDir dir(fromDir);
const int absSourcePathLength = dir.absoluteFilePath(fromDir).length();
while (it.hasNext()){
it.next();
const auto fileInfo = it.fileInfo();
if(!fileInfo.isHidden()) { //filters dot and dotdot
const QString subPathStructure = fileInfo.absoluteFilePath().mid(absSourcePathLength);
const QString constructedAbsolutePath = toDir + subPathStructure;
if(fileInfo.isDir()){
//Create directory in target folder
dir.mkpath(constructedAbsolutePath);
} else if(fileInfo.isFile()) {
//Copy File to target directory
//Remove file at target location, if it exists, or QFile::copy will fail
QFile::remove(constructedAbsolutePath);
QFile::copy(fileInfo.absoluteFilePath(), constructedAbsolutePath);
}
}
}
if(copyAndRemove)
dir.removeRecursively();
}
