NOISSUE Flatten gui and logic libraries into MultiMC

15 files changed, 1598 insertions, 0 deletions

diff --git a/launcher/java/JavaChecker.cpp b/launcher/java/JavaChecker.cpp
new file mode 100644
index 00000000..d78d6505
--- /dev/null
+++ b/launcher/java/JavaChecker.cpp
@@ -0,0 +1,166 @@
+#include "JavaChecker.h"
+#include "JavaUtils.h"
+#include <FileSystem.h>
+#include <Commandline.h>
+#include <QFile>
+#include <QProcess>
+#include <QMap>
+#include <QCoreApplication>
+#include <QDebug>
+
+#include "Env.h"
+
+JavaChecker::JavaChecker(QObject *parent) : QObject(parent)
+{
+}
+
+void JavaChecker::performCheck()
+{
+    QString checkerJar = FS::PathCombine(ENV.getJarsPath(), "JavaCheck.jar");
+
+    QStringList args;
+
+    process.reset(new QProcess());
+    if(m_args.size())
+    {
+        auto extraArgs = Commandline::splitArgs(m_args);
+        args.append(extraArgs);
+    }
+    if(m_minMem != 0)
+    {
+        args << QString("-Xms%1m").arg(m_minMem);
+    }
+    if(m_maxMem != 0)
+    {
+        args << QString("-Xmx%1m").arg(m_maxMem);
+    }
+    if(m_permGen != 64)
+    {
+        args << QString("-XX:PermSize=%1m").arg(m_permGen);
+    }
+
+    args.append({"-jar", checkerJar});
+    process->setArguments(args);
+    process->setProgram(m_path);
+    process->setProcessChannelMode(QProcess::SeparateChannels);
+    process->setProcessEnvironment(CleanEnviroment());
+    qDebug() << "Running java checker: " + m_path + args.join(" ");;
+
+    connect(process.get(), SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(finished(int, QProcess::ExitStatus)));
+    connect(process.get(), SIGNAL(error(QProcess::ProcessError)), this, SLOT(error(QProcess::ProcessError)));
+    connect(process.get(), SIGNAL(readyReadStandardOutput()), this, SLOT(stdoutReady()));
+    connect(process.get(), SIGNAL(readyReadStandardError()), this, SLOT(stderrReady()));
+    connect(&killTimer, SIGNAL(timeout()), SLOT(timeout()));
+    killTimer.setSingleShot(true);
+    killTimer.start(15000);
+    process->start();
+}
+
+void JavaChecker::stdoutReady()
+{
+    QByteArray data = process->readAllStandardOutput();
+    QString added = QString::fromLocal8Bit(data);
+    added.remove('\r');
+    m_stdout += added;
+}
+
+void JavaChecker::stderrReady()
+{
+    QByteArray data = process->readAllStandardError();
+    QString added = QString::fromLocal8Bit(data);
+    added.remove('\r');
+    m_stderr += added;
+}
+
+void JavaChecker::finished(int exitcode, QProcess::ExitStatus status)
+{
+    killTimer.stop();
+    QProcessPtr _process = process;
+    process.reset();
+
+    JavaCheckResult result;
+    {
+        result.path = m_path;
+        result.id = m_id;
+    }
+    result.errorLog = m_stderr;
+    result.outLog = m_stdout;
+    qDebug() << "STDOUT" << m_stdout;
+    qWarning() << "STDERR" << m_stderr;
+    qDebug() << "Java checker finished with status " << status << " exit code " << exitcode;
+
+    if (status == QProcess::CrashExit || exitcode == 1)
+    {
+        result.validity = JavaCheckResult::Validity::Errored;
+        emit checkFinished(result);
+        return;
+    }
+
+    bool success = true;
+
+    QMap<QString, QString> results;
+    QStringList lines = m_stdout.split("\n", QString::SkipEmptyParts);
+    for(QString line : lines)
+    {
+        line = line.trimmed();
+
+        auto parts = line.split('=', QString::SkipEmptyParts);
+        if(parts.size() != 2 || parts[0].isEmpty() || parts[1].isEmpty())
+        {
+            success = false;
+        }
+        else
+        {
+            results.insert(parts[0], parts[1]);
+        }
+    }
+
+    if(!results.contains("os.arch") || !results.contains("java.version") || !results.contains("java.vendor") || !success)
+    {
+        result.validity = JavaCheckResult::Validity::ReturnedInvalidData;
+        emit checkFinished(result);
+        return;
+    }
+
+    auto os_arch = results["os.arch"];
+    auto java_version = results["java.version"];
+    auto java_vendor = results["java.vendor"];
+    bool is_64 = os_arch == "x86_64" || os_arch == "amd64";
+
+
+    result.validity = JavaCheckResult::Validity::Valid;
+    result.is_64bit = is_64;
+    result.mojangPlatform = is_64 ? "64" : "32";
+    result.realPlatform = os_arch;
+    result.javaVersion = java_version;
+    result.javaVendor = java_vendor;
+    qDebug() << "Java checker succeeded.";
+    emit checkFinished(result);
+}
+
+void JavaChecker::error(QProcess::ProcessError err)
+{
+    if(err == QProcess::FailedToStart)
+    {
+        killTimer.stop();
+        qDebug() << "Java checker has failed to start.";
+        JavaCheckResult result;
+        {
+            result.path = m_path;
+            result.id = m_id;
+        }
+
+        emit checkFinished(result);
+        return;
+    }
+}
+
+void JavaChecker::timeout()
+{
+    // NO MERCY. NO ABUSE.
+    if(process)
+    {
+        qDebug() << "Java checker has been killed by timeout.";
+        process->kill();
+    }
+}
diff --git a/launcher/java/JavaChecker.h b/launcher/java/JavaChecker.h
new file mode 100644
index 00000000..122861cf
--- /dev/null
+++ b/launcher/java/JavaChecker.h
@@ -0,0 +1,61 @@
+#pragma once
+#include <QProcess>
+#include <QTimer>
+#include <memory>
+
+#include "QObjectPtr.h"
+
+#include "JavaVersion.h"
+
+class JavaChecker;
+
+struct JavaCheckResult
+{
+    QString path;
+    QString mojangPlatform;
+    QString realPlatform;
+    JavaVersion javaVersion;
+    QString javaVendor;
+    QString outLog;
+    QString errorLog;
+    bool is_64bit = false;
+    int id;
+    enum class Validity
+    {
+        Errored,
+        ReturnedInvalidData,
+        Valid
+    } validity = Validity::Errored;
+};
+
+typedef shared_qobject_ptr<QProcess> QProcessPtr;
+typedef shared_qobject_ptr<JavaChecker> JavaCheckerPtr;
+class JavaChecker : public QObject
+{
+    Q_OBJECT
+public:
+    explicit JavaChecker(QObject *parent = 0);
+    void performCheck();
+
+    QString m_path;
+    QString m_args;
+    int m_id = 0;
+    int m_minMem = 0;
+    int m_maxMem = 0;
+    int m_permGen = 64;
+
+signals:
+    void checkFinished(JavaCheckResult result);
+private:
+    QProcessPtr process;
+    QTimer killTimer;
+    QString m_stdout;
+    QString m_stderr;
+public
+slots:
+    void timeout();
+    void finished(int exitcode, QProcess::ExitStatus);
+    void error(QProcess::ProcessError);
+    void stdoutReady();
+    void stderrReady();
+};
diff --git a/launcher/java/JavaCheckerJob.cpp b/launcher/java/JavaCheckerJob.cpp
new file mode 100644
index 00000000..67d70066
--- /dev/null
+++ b/launcher/java/JavaCheckerJob.cpp
@@ -0,0 +1,44 @@
+/* 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 "JavaCheckerJob.h"
+
+#include <QDebug>
+
+void JavaCheckerJob::partFinished(JavaCheckResult result)
+{
+    num_finished++;
+    qDebug() << m_job_name.toLocal8Bit() << "progress:" << num_finished << "/"
+                << javacheckers.size();
+    setProgress(num_finished, javacheckers.size());
+
+    javaresults.replace(result.id, result);
+
+    if (num_finished == javacheckers.size())
+    {
+        emitSucceeded();
+    }
+}
+
+void JavaCheckerJob::executeTask()
+{
+    qDebug() << m_job_name.toLocal8Bit() << " started.";
+    for (auto iter : javacheckers)
+    {
+        javaresults.append(JavaCheckResult());
+        connect(iter.get(), SIGNAL(checkFinished(JavaCheckResult)), SLOT(partFinished(JavaCheckResult)));
+        iter->performCheck();
+    }
+}
diff --git a/launcher/java/JavaCheckerJob.h b/launcher/java/JavaCheckerJob.h
new file mode 100644
index 00000000..c0986420
--- /dev/null
+++ b/launcher/java/JavaCheckerJob.h
@@ -0,0 +1,61 @@
+/* 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.
+ */
+
+#pragma once
+
+#include <QtNetwork>
+#include "JavaChecker.h"
+#include "tasks/Task.h"
+
+class JavaCheckerJob;
+typedef shared_qobject_ptr<JavaCheckerJob> JavaCheckerJobPtr;
+
+// FIXME: this just seems horribly redundant
+class JavaCheckerJob : public Task
+{
+    Q_OBJECT
+public:
+    explicit JavaCheckerJob(QString job_name) : Task(), m_job_name(job_name) {};
+    virtual ~JavaCheckerJob() {};
+
+    bool addJavaCheckerAction(JavaCheckerPtr base)
+    {
+        javacheckers.append(base);
+        // if this is already running, the action needs to be started right away!
+        if (isRunning())
+        {
+            setProgress(num_finished, javacheckers.size());
+            connect(base.get(), &JavaChecker::checkFinished, this, &JavaCheckerJob::partFinished);
+            base->performCheck();
+        }
+        return true;
+    }
+    QList<JavaCheckResult> getResults()
+    {
+        return javaresults;
+    }
+
+private slots:
+    void partFinished(JavaCheckResult result);
+
+protected:
+    virtual void executeTask() override;
+
+private:
+    QString m_job_name;
+    QList<JavaCheckerPtr> javacheckers;
+    QList<JavaCheckResult> javaresults;
+    int num_finished = 0;
+};
diff --git a/launcher/java/JavaInstall.cpp b/launcher/java/JavaInstall.cpp
new file mode 100644
index 00000000..5bcf7bcb
--- /dev/null
+++ b/launcher/java/JavaInstall.cpp
@@ -0,0 +1,28 @@
+#include "JavaInstall.h"
+#include <MMCStrings.h>
+
+bool JavaInstall::operator<(const JavaInstall &rhs)
+{
+    auto archCompare = Strings::naturalCompare(arch, rhs.arch, Qt::CaseInsensitive);
+    if(archCompare != 0)
+        return archCompare < 0;
+    if(id < rhs.id)
+    {
+        return true;
+    }
+    if(id > rhs.id)
+    {
+        return false;
+    }
+    return Strings::naturalCompare(path, rhs.path, Qt::CaseInsensitive) < 0;
+}
+
+bool JavaInstall::operator==(const JavaInstall &rhs)
+{
+    return arch == rhs.arch && id == rhs.id && path == rhs.path;
+}
+
+bool JavaInstall::operator>(const JavaInstall &rhs)
+{
+    return (!operator<(rhs)) && (!operator==(rhs));
+}
diff --git a/launcher/java/JavaInstall.h b/launcher/java/JavaInstall.h
new file mode 100644
index 00000000..64be40d1
--- /dev/null
+++ b/launcher/java/JavaInstall.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include "BaseVersion.h"
+#include "JavaVersion.h"
+
+struct JavaInstall : public BaseVersion
+{
+    JavaInstall(){}
+    JavaInstall(QString id, QString arch, QString path)
+    : id(id), arch(arch), path(path)
+    {
+    }
+    virtual QString descriptor()
+    {
+        return id.toString();
+    }
+
+    virtual QString name()
+    {
+        return id.toString();
+    }
+
+    virtual QString typeString() const
+    {
+        return arch;
+    }
+
+    bool operator<(const JavaInstall & rhs);
+    bool operator==(const JavaInstall & rhs);
+    bool operator>(const JavaInstall & rhs);
+
+    JavaVersion id;
+    QString arch;
+    QString path;
+    bool recommended = false;
+};
+
+typedef std::shared_ptr<JavaInstall> JavaInstallPtr;
diff --git a/launcher/java/JavaInstallList.cpp b/launcher/java/JavaInstallList.cpp
new file mode 100644
index 00000000..0bded03c
--- /dev/null
+++ b/launcher/java/JavaInstallList.cpp
@@ -0,0 +1,208 @@
+/* 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 <QtNetwork>
+#include <QtXml>
+#include <QRegExp>
+
+#include <QDebug>
+
+#include "java/JavaInstallList.h"
+#include "java/JavaCheckerJob.h"
+#include "java/JavaUtils.h"
+#include "MMCStrings.h"
+#include "minecraft/VersionFilterData.h"
+
+JavaInstallList::JavaInstallList(QObject *parent) : BaseVersionList(parent)
+{
+}
+
+shared_qobject_ptr<Task> JavaInstallList::getLoadTask()
+{
+    load();
+    return getCurrentTask();
+}
+
+shared_qobject_ptr<Task> JavaInstallList::getCurrentTask()
+{
+    if(m_status == Status::InProgress)
+    {
+        return m_loadTask;
+    }
+    return nullptr;
+}
+
+void JavaInstallList::load()
+{
+    if(m_status != Status::InProgress)
+    {
+        m_status = Status::InProgress;
+        m_loadTask = new JavaListLoadTask(this);
+        m_loadTask->start();
+    }
+}
+
+const BaseVersionPtr JavaInstallList::at(int i) const
+{
+    return m_vlist.at(i);
+}
+
+bool JavaInstallList::isLoaded()
+{
+    return m_status == JavaInstallList::Status::Done;
+}
+
+int JavaInstallList::count() const
+{
+    return m_vlist.count();
+}
+
+QVariant JavaInstallList::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return QVariant();
+
+    if (index.row() > count())
+        return QVariant();
+
+    auto version = std::dynamic_pointer_cast<JavaInstall>(m_vlist[index.row()]);
+    switch (role)
+    {
+        case VersionPointerRole:
+            return qVariantFromValue(m_vlist[index.row()]);
+        case VersionIdRole:
+            return version->descriptor();
+        case VersionRole:
+            return version->id.toString();
+        case RecommendedRole:
+            return version->recommended;
+        case PathRole:
+            return version->path;
+        case ArchitectureRole:
+            return version->arch;
+        default:
+            return QVariant();
+    }
+}
+
+BaseVersionList::RoleList JavaInstallList::providesRoles() const
+{
+    return {VersionPointerRole, VersionIdRole, VersionRole, RecommendedRole, PathRole, ArchitectureRole};
+}
+
+
+void JavaInstallList::updateListData(QList<BaseVersionPtr> versions)
+{
+    beginResetModel();
+    m_vlist = versions;
+    sortVersions();
+    if(m_vlist.size())
+    {
+        auto best = std::dynamic_pointer_cast<JavaInstall>(m_vlist[0]);
+        best->recommended = true;
+    }
+    endResetModel();
+    m_status = Status::Done;
+    m_loadTask.reset();
+}
+
+bool sortJavas(BaseVersionPtr left, BaseVersionPtr right)
+{
+    auto rleft = std::dynamic_pointer_cast<JavaInstall>(left);
+    auto rright = std::dynamic_pointer_cast<JavaInstall>(right);
+    return (*rleft) > (*rright);
+}
+
+void JavaInstallList::sortVersions()
+{
+    beginResetModel();
+    std::sort(m_vlist.begin(), m_vlist.end(), sortJavas);
+    endResetModel();
+}
+
+JavaListLoadTask::JavaListLoadTask(JavaInstallList *vlist) : Task()
+{
+    m_list = vlist;
+    m_currentRecommended = NULL;
+}
+
+JavaListLoadTask::~JavaListLoadTask()
+{
+}
+
+void JavaListLoadTask::executeTask()
+{
+    setStatus(tr("Detecting Java installations..."));
+
+    JavaUtils ju;
+    QList<QString> candidate_paths = ju.FindJavaPaths();
+
+    m_job = new JavaCheckerJob("Java detection");
+    connect(m_job.get(), &Task::finished, this, &JavaListLoadTask::javaCheckerFinished);
+    connect(m_job.get(), &Task::progress, this, &Task::setProgress);
+
+    qDebug() << "Probing the following Java paths: ";
+    int id = 0;
+    for(QString candidate : candidate_paths)
+    {
+        qDebug() << " " << candidate;
+
+        auto candidate_checker = new JavaChecker();
+        candidate_checker->m_path = candidate;
+        candidate_checker->m_id = id;
+        m_job->addJavaCheckerAction(JavaCheckerPtr(candidate_checker));
+
+        id++;
+    }
+
+    m_job->start();
+}
+
+void JavaListLoadTask::javaCheckerFinished()
+{
+    QList<JavaInstallPtr> candidates;
+    auto results = m_job->getResults();
+
+    qDebug() << "Found the following valid Java installations:";
+    for(JavaCheckResult result : results)
+    {
+        if(result.validity == JavaCheckResult::Validity::Valid)
+        {
+            JavaInstallPtr javaVersion(new JavaInstall());
+
+            javaVersion->id = result.javaVersion;
+            javaVersion->arch = result.mojangPlatform;
+            javaVersion->path = result.path;
+            candidates.append(javaVersion);
+
+            qDebug() << " " << javaVersion->id.toString() << javaVersion->arch << javaVersion->path;
+        }
+    }
+
+    QList<BaseVersionPtr> javas_bvp;
+    for (auto java : candidates)
+    {
+        //qDebug() << java->id << java->arch << " at " << java->path;
+        BaseVersionPtr bp_java = std::dynamic_pointer_cast<BaseVersion>(java);
+
+        if (bp_java)
+        {
+            javas_bvp.append(java);
+        }
+    }
+
+    m_list->updateListData(javas_bvp);
+    emitSucceeded();
+}
diff --git a/launcher/java/JavaInstallList.h b/launcher/java/JavaInstallList.h
new file mode 100644
index 00000000..e5c72b17
--- /dev/null
+++ b/launcher/java/JavaInstallList.h
@@ -0,0 +1,81 @@
+/* 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.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <QAbstractListModel>
+
+#include "BaseVersionList.h"
+#include "tasks/Task.h"
+
+#include "JavaCheckerJob.h"
+#include "JavaInstall.h"
+
+#include "QObjectPtr.h"
+
+class JavaListLoadTask;
+
+class JavaInstallList : public BaseVersionList
+{
+    Q_OBJECT
+    enum class Status
+    {
+        NotDone,
+        InProgress,
+        Done
+    };
+public:
+    explicit JavaInstallList(QObject *parent = 0);
+
+    shared_qobject_ptr<Task> getLoadTask() override;
+    bool isLoaded() override;
+    const BaseVersionPtr at(int i) const override;
+    int count() const override;
+    void sortVersions() override;
+
+    QVariant data(const QModelIndex &index, int role) const override;
+    RoleList providesRoles() const override;
+
+public slots:
+    void updateListData(QList<BaseVersionPtr> versions) override;
+
+protected:
+    void load();
+    shared_qobject_ptr<Task> getCurrentTask();
+
+protected:
+    Status m_status = Status::NotDone;
+    shared_qobject_ptr<JavaListLoadTask> m_loadTask;
+    QList<BaseVersionPtr> m_vlist;
+};
+
+class JavaListLoadTask : public Task
+{
+    Q_OBJECT
+
+public:
+    explicit JavaListLoadTask(JavaInstallList *vlist);
+    virtual ~JavaListLoadTask();
+
+    void executeTask() override;
+public slots:
+    void javaCheckerFinished();
+
+protected:
+    shared_qobject_ptr<JavaCheckerJob> m_job;
+    JavaInstallList *m_list;
+    JavaInstall *m_currentRecommended;
+};
diff --git a/launcher/java/JavaUtils.cpp b/launcher/java/JavaUtils.cpp
new file mode 100644
index 00000000..4b231e6a
--- /dev/null
+++ b/launcher/java/JavaUtils.cpp
@@ -0,0 +1,399 @@
+/* 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 <QStringList>
+#include <QString>
+#include <QDir>
+#include <QStringList>
+
+#include <settings/Setting.h>
+
+#include <QDebug>
+#include "java/JavaUtils.h"
+#include "java/JavaInstallList.h"
+#include "FileSystem.h"
+
+#define IBUS "@im=ibus"
+
+JavaUtils::JavaUtils()
+{
+}
+
+#ifdef Q_OS_LINUX
+static QString processLD_LIBRARY_PATH(const QString & LD_LIBRARY_PATH)
+{
+    QDir mmcBin(QCoreApplication::applicationDirPath());
+    auto items = LD_LIBRARY_PATH.split(':');
+    QStringList final;
+    for(auto & item: items)
+    {
+        QDir test(item);
+        if(test == mmcBin)
+        {
+            qDebug() << "Env:LD_LIBRARY_PATH ignoring path" << item;
+            continue;
+        }
+        final.append(item);
+    }
+    return final.join(':');
+}
+#endif
+
+QProcessEnvironment CleanEnviroment()
+{
+    // prepare the process environment
+    QProcessEnvironment rawenv = QProcessEnvironment::systemEnvironment();
+    QProcessEnvironment env;
+
+    QStringList ignored =
+    {
+        "JAVA_ARGS",
+        "CLASSPATH",
+        "CONFIGPATH",
+        "JAVA_HOME",
+        "JRE_HOME",
+        "_JAVA_OPTIONS",
+        "JAVA_OPTIONS",
+        "JAVA_TOOL_OPTIONS"
+    };
+    for(auto key: rawenv.keys())
+    {
+        auto value = rawenv.value(key);
+        // filter out dangerous java crap
+        if(ignored.contains(key))
+        {
+            qDebug() << "Env: ignoring" << key << value;
+            continue;
+        }
+        // filter MultiMC-related things
+        if(key.startsWith("QT_"))
+        {
+            qDebug() << "Env: ignoring" << key << value;
+            continue;
+        }
+#ifdef Q_OS_LINUX
+        // Do not pass LD_* variables to java. They were intended for MultiMC
+        if(key.startsWith("LD_"))
+        {
+            qDebug() << "Env: ignoring" << key << value;
+            continue;
+        }
+        // Strip IBus
+        // IBus is a Linux IME framework. For some reason, it breaks MC?
+        if (key == "XMODIFIERS" && value.contains(IBUS))
+        {
+            QString save = value;
+            value.replace(IBUS, "");
+            qDebug() << "Env: stripped" << IBUS << "from" << save << ":" << value;
+        }
+        if(key == "GAME_PRELOAD")
+        {
+            env.insert("LD_PRELOAD", value);
+            continue;
+        }
+        if(key == "GAME_LIBRARY_PATH")
+        {
+            env.insert("LD_LIBRARY_PATH", processLD_LIBRARY_PATH(value));
+            continue;
+        }
+#endif
+        // qDebug() << "Env: " << key << value;
+        env.insert(key, value);
+    }
+#ifdef Q_OS_LINUX
+    // HACK: Workaround for QTBUG42500
+    if(!env.contains("LD_LIBRARY_PATH"))
+    {
+        env.insert("LD_LIBRARY_PATH", "");
+    }
+#endif
+
+    return env;
+}
+
+JavaInstallPtr JavaUtils::MakeJavaPtr(QString path, QString id, QString arch)
+{
+    JavaInstallPtr javaVersion(new JavaInstall());
+
+    javaVersion->id = id;
+    javaVersion->arch = arch;
+    javaVersion->path = path;
+
+    return javaVersion;
+}
+
+JavaInstallPtr JavaUtils::GetDefaultJava()
+{
+    JavaInstallPtr javaVersion(new JavaInstall());
+
+    javaVersion->id = "java";
+    javaVersion->arch = "unknown";
+#if defined(Q_OS_WIN32)
+    javaVersion->path = "javaw";
+#else
+    javaVersion->path = "java";
+#endif
+
+    return javaVersion;
+}
+
+#if defined(Q_OS_WIN32)
+QList<JavaInstallPtr> JavaUtils::FindJavaFromRegistryKey(DWORD keyType, QString keyName, QString keyJavaDir, QString subkeySuffix)
+{
+    QList<JavaInstallPtr> javas;
+
+    QString archType = "unknown";
+    if (keyType == KEY_WOW64_64KEY)
+        archType = "64";
+    else if (keyType == KEY_WOW64_32KEY)
+        archType = "32";
+
+    HKEY jreKey;
+    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, keyName.toStdString().c_str(), 0,
+                      KEY_READ | keyType | KEY_ENUMERATE_SUB_KEYS, &jreKey) == ERROR_SUCCESS)
+    {
+        // Read the current type version from the registry.
+        // This will be used to find any key that contains the JavaHome value.
+        char *value = new char[0];
+        DWORD valueSz = 0;
+        if (RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE *)value, &valueSz) ==
+            ERROR_MORE_DATA)
+        {
+            value = new char[valueSz];
+            RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE *)value, &valueSz);
+        }
+
+        TCHAR subKeyName[255];
+        DWORD subKeyNameSize, numSubKeys, retCode;
+
+        // Get the number of subkeys
+        RegQueryInfoKey(jreKey, NULL, NULL, NULL, &numSubKeys, NULL, NULL, NULL, NULL, NULL,
+                        NULL, NULL);
+
+        // Iterate until RegEnumKeyEx fails
+        if (numSubKeys > 0)
+        {
+            for (DWORD i = 0; i < numSubKeys; i++)
+            {
+                subKeyNameSize = 255;
+                retCode = RegEnumKeyEx(jreKey, i, subKeyName, &subKeyNameSize, NULL, NULL, NULL,
+                                       NULL);
+                if (retCode == ERROR_SUCCESS)
+                {
+                    // Now open the registry key for the version that we just got.
+                    QString newKeyName = keyName + "\\" + subKeyName + subkeySuffix;
+
+                    HKEY newKey;
+                    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, newKeyName.toStdString().c_str(), 0,
+                                     KEY_READ | KEY_WOW64_64KEY, &newKey) == ERROR_SUCCESS)
+                    {
+                        // Read the JavaHome value to find where Java is installed.
+                        value = new char[0];
+                        valueSz = 0;
+                        if (RegQueryValueEx(newKey, keyJavaDir.toStdString().c_str(), NULL, NULL, (BYTE *)value,
+                                            &valueSz) == ERROR_MORE_DATA)
+                        {
+                            value = new char[valueSz];
+                            RegQueryValueEx(newKey, keyJavaDir.toStdString().c_str(), NULL, NULL, (BYTE *)value,
+                                            &valueSz);
+
+                            // Now, we construct the version object and add it to the list.
+                            JavaInstallPtr javaVersion(new JavaInstall());
+
+                            javaVersion->id = subKeyName;
+                            javaVersion->arch = archType;
+                            javaVersion->path =
+                                QDir(FS::PathCombine(value, "bin")).absoluteFilePath("javaw.exe");
+                            javas.append(javaVersion);
+                        }
+
+                        RegCloseKey(newKey);
+                    }
+                }
+            }
+        }
+
+        RegCloseKey(jreKey);
+    }
+
+    return javas;
+}
+
+QList<QString> JavaUtils::FindJavaPaths()
+{
+    QList<JavaInstallPtr> java_candidates;
+
+    // Oracle
+    QList<JavaInstallPtr> JRE64s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment", "JavaHome");
+    QList<JavaInstallPtr> JDK64s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Development Kit", "JavaHome");
+    QList<JavaInstallPtr> JRE32s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment", "JavaHome");
+    QList<JavaInstallPtr> JDK32s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Development Kit", "JavaHome");
+
+    // Oracle for Java 9 and newer
+    QList<JavaInstallPtr> NEWJRE64s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\JRE", "JavaHome");
+    QList<JavaInstallPtr> NEWJDK64s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\JDK", "JavaHome");
+    QList<JavaInstallPtr> NEWJRE32s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\JRE", "JavaHome");
+    QList<JavaInstallPtr> NEWJDK32s = this->FindJavaFromRegistryKey(
+        KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\JDK", "JavaHome");
+
+    // AdoptOpenJDK
+    QList<JavaInstallPtr> ADOPTOPENJRE32s = this->FindJavaFromRegistryKey(
+        KEY