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GH-1060 ugly XP hack is ugly

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This commit is contained in:
Petr Mrázek 2015-06-10 02:31:34 +02:00
parent 88f5c8d347
commit dd97ea8029
2 changed files with 55 additions and 0 deletions
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52
application/MultiMC.cpp
View File

@ -694,6 +694,11 @@ void MultiMC::installUpdates(const QString updateFilesDir, GoUpdate::OperationLi
QList <BackupEntry> backups;
QList <BackupEntry> trashcan;
bool useXPHack = false;
QString exePath;
QString exeOrigin;
QString exeBackup;
// perform the update operations
for(auto op: operations)
{
@ -703,6 +708,20 @@ void MultiMC::installUpdates(const QString updateFilesDir, GoUpdate::OperationLi
case GoUpdate::Operation::OP_REPLACE:
{
QFileInfo replaced (PathCombine(root(), op.dest));
#ifdef Q_OS_WIN32
if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA)
{
if(replaced.fileName() == "MultiMC.exe")
{
QDir rootDir(root());
exeOrigin = rootDir.relativeFilePath(op.file);
exePath = rootDir.relativeFilePath(op.dest);
exeBackup = rootDir.relativeFilePath(PathCombine(backupPath, replaced.fileName()));
useXPHack = true;
continue;
}
}
#endif
if(replaced.exists())
{
QString backupName = op.dest;
@ -766,6 +785,39 @@ void MultiMC::installUpdates(const QString updateFilesDir, GoUpdate::OperationLi
// try to start the new binary
args = qApp->arguments();
args.removeFirst();
// on old Windows, do insane things... no error checking here, this is just to have something.
if(useXPHack)
{
QString script;
auto nativePath = QDir::toNativeSeparators(exePath);
auto nativeOriginPath = QDir::toNativeSeparators(exeOrigin);
auto nativeBackupPath = QDir::toNativeSeparators(exeBackup);
// so we write this vbscript thing...
QTextStream out(&script);
out << "WScript.Sleep 1000\n";
out << "Set fso=CreateObject(\"Scripting.FileSystemObject\")\n";
out << "Set shell=CreateObject(\"WScript.Shell\")\n";
out << "fso.MoveFile \"" << nativePath << "\", \"" << nativeBackupPath << "\"\n";
out << "fso.MoveFile \"" << nativeOriginPath << "\", \"" << nativePath << "\"\n";
out << "shell.Run \"" << nativePath << "\"\n";
QString scriptPath = PathCombine(root(), "update", "update.vbs");
// we save it
QFile scriptFile(scriptPath);
scriptFile.open(QIODevice::WriteOnly);
scriptFile.write(script.toLocal8Bit().replace("\n", "\r\n"));
scriptFile.close();
// we run it
started = QProcess::startDetached("wscript", {scriptPath}, root());
// and we quit. conscious thought.
qApp->quit();
return;
}
started = QProcess::startDetached(finishCmd, args, QDir::currentPath(), &pid);
// failed to start... ?
if(!started || pid == -1)

3
application/MultiMC.h
View File

@ -106,7 +106,10 @@ public:
}
// APPLICATION ONLY
QString getFinishCmd();
void installUpdates(const QString updateFilesDir, GoUpdate::OperationList operations);
void updateXP(const QString updateFilesDir, GoUpdate::OperationList operations);
void updateModern(const QString updateFilesDir, GoUpdate::OperationList operations);
/*!
* Opens a json file using either a system default editor, or, if note empty, the editor