pollymc/api/logic/MMCZip.cpp

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/* Copyright 2013-2019 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.
*/
#include <quazip.h>
#include <quazipdir.h>
#include <quazipfile.h>
#include <JlCompress.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 JlCompress::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;
}
// ours
bool MMCZip::createModdedJar(QString sourceJarPath, QString targetJarPath, const QList<Mod>& mods)
{
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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
QListIterator<Mod> i(mods);
i.toBack();
while (i.hasPrevious())
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{
const Mod &mod = i.previous();
// do not merge disabled mods.
if (!mod.enabled())
continue;
if (mod.type() == Mod::MOD_ZIPFILE)
{
if (!mergeZipFiles(&zipOut, mod.filename(), addedFiles))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod.filename().fileName() << "to the jar.";
return false;
}
}
else if (mod.type() == Mod::MOD_SINGLEFILE)
{
// FIXME: buggy - does not work with addedFiles
auto filename = mod.filename();
if (!JlCompress::compressFile(&zipOut, filename.absoluteFilePath(), filename.fileName()))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod.filename().fileName() << "to the jar.";
return false;
}
addedFiles.insert(filename.fileName());
}
else if (mod.type() == Mod::MOD_FOLDER)
{
// FIXME: buggy - does not work with addedFiles
auto filename = mod.filename();
QString what_to_zip = filename.absoluteFilePath();
QDir dir(what_to_zip);
dir.cdUp();
QString parent_dir = dir.absolutePath();
if (!JlCompress::compressSubDir(&zipOut, what_to_zip, parent_dir, addedFiles))
{
zipOut.close();
QFile::remove(targetJarPath);
qCritical() << "Failed to add" << mod.filename().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.filename().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
QStringList MMCZip::extractSubDir(QuaZip *zip, const QString & subdir, const QString &target)
{
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QDir directory(target);
QStringList extracted;
qDebug() << "Extracting subdir" << subdir << "from" << zip->getZipName() << "to" << target;
if (!zip->goToFirstFile())
{
qWarning() << "Failed to seek to first file in zip";
return QStringList();
}
do
{
QString name = zip->getCurrentFileName();
if(!name.startsWith(subdir))
{
continue;
}
name.remove(0, subdir.size());
QString absFilePath = directory.absoluteFilePath(name);
if(name.isEmpty())
{
absFilePath += "/";
}
if (!JlCompress::extractFile(zip, "", absFilePath))
{
qWarning() << "Failed to extract file" << name << "to" << absFilePath;
JlCompress::removeFile(extracted);
return QStringList();
}
extracted.append(absFilePath);
qDebug() << "Extracted file" << name;
} while (zip->goToNextFile());
return extracted;
}
// ours
QStringList MMCZip::extractDir(QString fileCompressed, QString dir)
{
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QuaZip zip(fileCompressed);
if (!zip.open(QuaZip::mdUnzip))
{
return {};
}
return MMCZip::extractSubDir(&zip, "", dir);
}