diff options
Diffstat (limited to 'launcher/MMCZip.cpp')
| -rw-r--r-- | launcher/MMCZip.cpp | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/launcher/MMCZip.cpp b/launcher/MMCZip.cpp new file mode 100644 index 00000000..b25c61e7 --- /dev/null +++ b/launcher/MMCZip.cpp @@ -0,0 +1,312 @@ +/* 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. + */ + +#include <quazip.h> +#include <quazipdir.h> +#include <quazipfile.h> +#include <JlCompress.h> +#include "MMCZip.h" +#include "FileSystem.h" + +#include <QDebug> + +// ours +bool MMCZip::mergeZipFiles(QuaZip *into, QFileInfo from, QSet<QString> &contained, const JlCompress::FilterFunction filter) +{ + 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) +{ + 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()) + { + 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) +{ + 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) +{ + 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) +{ + QDir directory(target); + QStringList extracted; + + 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()) + { + qWarning() << "Failed to seek to first file in zip"; + return nonstd::nullopt; + } + + 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 nonstd::nullopt; + } + extracted.append(absFilePath); + qDebug() << "Extracted file" << name; + } while (zip->goToNextFile()); + return extracted; +} + +// 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) +{ + 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; + } + return MMCZip::extractSubDir(&zip, "", dir); +} + +// ours +nonstd::optional<QStringList> MMCZip::extractDir(QString fileCompressed, QString subdir, QString dir) +{ + 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; + } + 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; + } + return MMCZip::extractRelFile(&zip, file, target); +} |