pollymc/launcher/MMCZip.cpp

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// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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#include <quazip/quazip.h>
#include <quazip/quazipdir.h>
#include <quazip/quazipfile.h>
#include "MMCZip.h"
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#include "FileSystem.h"
#include <QDebug>
// ours
bool MMCZip::mergeZipFiles(QuaZip *into, QFileInfo from, QSet<QString> &contained, const FilterFunction filter)
{
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QuaZip modZip(from.filePath());
modZip.open(QuaZip::mdUnzip);
QuaZipFile fileInsideMod(&modZip);
QuaZipFile zipOutFile(into);
for (bool more = modZip.goToFirstFile(); more; more = modZip.goToNextFile())
{
QString filename = modZip.getCurrentFileName();
if (filter && !filter(filename))
{
qDebug() << "Skipping file " << filename << " from "
<< from.fileName() << " - filtered";
continue;
}
if (contained.contains(filename))
{
qDebug() << "Skipping already contained file " << filename << " from "
<< from.fileName();
continue;
}
contained.insert(filename);
if (!fileInsideMod.open(QIODevice::ReadOnly))
{
qCritical() << "Failed to open " << filename << " from " << from.fileName();
return false;
}
QuaZipNewInfo info_out(fileInsideMod.getActualFileName());
if (!zipOutFile.open(QIODevice::WriteOnly, info_out))
{
qCritical() << "Failed to open " << filename << " in the jar";
fileInsideMod.close();
return false;
}
if (!JlCompress::copyData(fileInsideMod, zipOutFile))
{
zipOutFile.close();
fileInsideMod.close();
qCritical() << "Failed to copy data of " << filename << " into the jar";
return false;
}
zipOutFile.close();
fileInsideMod.close();
}
return true;
}
bool MMCZip::compressDirFiles(QuaZip *zip, QString dir, QFileInfoList files)
{
QDir directory(dir);
if (!directory.exists()) return false;
for (auto e : files) {
auto filePath = directory.relativeFilePath(e.absoluteFilePath());
if( !JlCompress::compressFile(zip, e.absoluteFilePath(), filePath)) return false;
}
return true;
}
bool MMCZip::compressDirFiles(QString fileCompressed, QString dir, QFileInfoList files)
{
QuaZip zip(fileCompressed);
QDir().mkpath(QFileInfo(fileCompressed).absolutePath());
if(!zip.open(QuaZip::mdCreate)) {
QFile::remove(fileCompressed);
return false;
}
auto result = compressDirFiles(&zip, dir, files);
zip.close();
if(zip.getZipError()!=0) {
QFile::remove(fileCompressed);
return false;
}
return result;
}
// ours
bool MMCZip::createModdedJar(QString sourceJarPath, QString targetJarPath, const QList<Mod*>& mods)
{
QuaZip zipOut(targetJarPath);
if (!zipOut.open(QuaZip::mdCreate))
{
QFile::remove(targetJarPath);
qCritical() << "Failed to open the minecraft.jar for modding";
return false;
}
// Files already added to the jar.
// These files will be skipped.
QSet<QString> addedFiles;
// Modify the jar
// This needs to be done in reverse-order to ensure we respect the loading order of components
for (auto i = mods.crbegin(); i != mods.crend(); i++)
{
const auto* mod = *i;
// do not merge disabled mods.
if (!mod->enabled())
continue;
if (mod->type() == Mod::MOD_ZIPFILE)
{
if (!mergeZipFiles(&zipOut, mod->fileinfo(), addedFiles))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod->fileinfo().fileName() << "to the jar.";
return false;
}
}
else if (mod->type() == Mod::MOD_SINGLEFILE)
{
// FIXME: buggy - does not work with addedFiles
auto filename = mod->fileinfo();
if (!JlCompress::compressFile(&zipOut, filename.absoluteFilePath(), filename.fileName()))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod->fileinfo().fileName() << "to the jar.";
return false;
}
addedFiles.insert(filename.fileName());
}
else if (mod->type() == Mod::MOD_FOLDER)
{
// untested, but seems to be unused / not possible to reach
// FIXME: buggy - does not work with addedFiles
auto filename = mod->fileinfo();
QString what_to_zip = filename.absoluteFilePath();
QDir dir(what_to_zip);
dir.cdUp();
QString parent_dir = dir.absolutePath();
auto files = QFileInfoList();
MMCZip::collectFileListRecursively(what_to_zip, nullptr, &files, nullptr);
for (auto e : files) {
if (addedFiles.contains(e.filePath()))
files.removeAll(e);
}
if (!MMCZip::compressDirFiles(&zipOut, parent_dir, files))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod->fileinfo().fileName() << "to the jar.";
return false;
}
qDebug() << "Adding folder " << filename.fileName() << " from "
<< filename.absoluteFilePath();
}
else
{
// Make sure we do not continue launching when something is missing or undefined...
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add unknown mod type" << mod->fileinfo().fileName() << "to the jar.";
return false;
}
}
if (!mergeZipFiles(&zipOut, QFileInfo(sourceJarPath), addedFiles, [](const QString key){return !key.contains("META-INF");}))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to insert minecraft.jar contents.";
return false;
}
// Recompress the jar
zipOut.close();
if (zipOut.getZipError() != 0)
{
QFile::remove(targetJarPath);
qCritical() << "Failed to finalize minecraft.jar!";
return false;
}
return true;
}
// ours
QString MMCZip::findFolderOfFileInZip(QuaZip * zip, const QString & what, const QString &root)
{
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QuaZipDir rootDir(zip, root);
for(auto fileName: rootDir.entryList(QDir::Files))
{
if(fileName == what)
return root;
}
for(auto fileName: rootDir.entryList(QDir::Dirs))
{
QString result = findFolderOfFileInZip(zip, what, root + fileName);
if(!result.isEmpty())
{
return result;
}
}
return QString();
}
// ours
bool MMCZip::findFilesInZip(QuaZip * zip, const QString & what, QStringList & result, const QString &root)
{
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QuaZipDir rootDir(zip, root);
for(auto fileName: rootDir.entryList(QDir::Files))
{
if(fileName == what)
{
result.append(root);
return true;
}
}
for(auto fileName: rootDir.entryList(QDir::Dirs))
{
findFilesInZip(zip, what, result, root + fileName);
}
return !result.isEmpty();
}
// ours
nonstd::optional<QStringList> MMCZip::extractSubDir(QuaZip *zip, const QString & subdir, const QString &target)
{
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QDir directory(target);
QStringList extracted;
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qDebug() << "Extracting subdir" << subdir << "from" << zip->getZipName() << "to" << target;
auto numEntries = zip->getEntriesCount();
if(numEntries < 0) {
qWarning() << "Failed to enumerate files in archive";
return nonstd::nullopt;
}
else if(numEntries == 0) {
qDebug() << "Extracting empty archives seems odd...";
return extracted;
}
else if (!zip->goToFirstFile())
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{
qWarning() << "Failed to seek to first file in zip";
return nonstd::nullopt;
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}
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do
{
QString name = zip->getCurrentFileName();
if(!name.startsWith(subdir))
{
continue;
}
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name.remove(0, subdir.size());
auto original_name = name;
// Fix weird "folders with a single file get squashed" thing
QString path;
if(name.contains('/') && !name.endsWith('/')){
path = name.section('/', 0, -2) + "/";
FS::ensureFolderPathExists(FS::PathCombine(target, path));
name = name.split('/').last();
}
QString absFilePath;
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if(name.isEmpty())
{
absFilePath = directory.absoluteFilePath(name) + "/";
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}
else
{
absFilePath = directory.absoluteFilePath(path + name);
}
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if (!JlCompress::extractFile(zip, "", absFilePath))
{
qWarning() << "Failed to extract file" << original_name << "to" << absFilePath;
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JlCompress::removeFile(extracted);
return nonstd::nullopt;
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}
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extracted.append(absFilePath);
QFile::setPermissions(absFilePath, QFileDevice::Permission::ReadUser | QFileDevice::Permission::WriteUser | QFileDevice::Permission::ExeUser);
qDebug() << "Extracted file" << name << "to" << absFilePath;
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} while (zip->goToNextFile());
return extracted;
}
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// ours
bool MMCZip::extractRelFile(QuaZip *zip, const QString &file, const QString &target)
{
return JlCompress::extractFile(zip, file, target);
}
// ours
nonstd::optional<QStringList> MMCZip::extractDir(QString fileCompressed, QString dir)
{
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QuaZip zip(fileCompressed);
if (!zip.open(QuaZip::mdUnzip))
{
// check if this is a minimum size empty zip file...
QFileInfo fileInfo(fileCompressed);
if(fileInfo.size() == 22) {
return QStringList();
}
qWarning() << "Could not open archive for unzipping:" << fileCompressed << "Error:" << zip.getZipError();;
return nonstd::nullopt;
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}
return MMCZip::extractSubDir(&zip, "", dir);
}
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// ours
nonstd::optional<QStringList> MMCZip::extractDir(QString fileCompressed, QString subdir, QString dir)
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{
QuaZip zip(fileCompressed);
if (!zip.open(QuaZip::mdUnzip))
{
// check if this is a minimum size empty zip file...
QFileInfo fileInfo(fileCompressed);
if(fileInfo.size() == 22) {
return QStringList();
}
qWarning() << "Could not open archive for unzipping:" << fileCompressed << "Error:" << zip.getZipError();;
return nonstd::nullopt;
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}
return MMCZip::extractSubDir(&zip, subdir, dir);
}
// ours
bool MMCZip::extractFile(QString fileCompressed, QString file, QString target)
{
QuaZip zip(fileCompressed);
if (!zip.open(QuaZip::mdUnzip))
{
// check if this is a minimum size empty zip file...
QFileInfo fileInfo(fileCompressed);
if(fileInfo.size() == 22) {
return true;
}
qWarning() << "Could not open archive for unzipping:" << fileCompressed << "Error:" << zip.getZipError();
return false;
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}
return MMCZip::extractRelFile(&zip, file, target);
}
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bool MMCZip::collectFileListRecursively(const QString& rootDir, const QString& subDir, QFileInfoList *files,
MMCZip::FilterFunction excludeFilter) {
QDir rootDirectory(rootDir);
if (!rootDirectory.exists()) return false;
QDir directory;
if (subDir == nullptr)
directory = rootDirectory;
else
directory = QDir(subDir);
if (!directory.exists()) return false; // shouldn't ever happen
// recurse directories
QFileInfoList entries = directory.entryInfoList(QDir::AllDirs | QDir::NoDotAndDotDot | QDir::Hidden);
for (const auto& e: entries) {
if (!collectFileListRecursively(rootDir, e.filePath(), files, excludeFilter))
return false;
}
// collect files
entries = directory.entryInfoList(QDir::Files);
for (const auto& e: entries) {
QString relativeFilePath = rootDirectory.relativeFilePath(e.absoluteFilePath());
if (excludeFilter && excludeFilter(relativeFilePath)) {
qDebug() << "Skipping file " << relativeFilePath;
continue;
}
files->append(e); // we want the original paths for MMCZip::compressDirFiles
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}
return true;
}