Revert "fix removal of temporary directories"

This reverts commit b141349, which
causes crashes in almost every unit test.

python/core/auto_generated/qgsarchive.sip.in

@@ -9,7 +9,6 @@
 
 
 
-
 class QgsArchive
 {
 %Docstring

python/core/auto_generated/qgsnetworkcontentfetcherregistry.sip.in

@@ -11,6 +11,8 @@
 
 
 
+
+
 class QgsFetchedContent : QObject
 {
 %Docstring

src/core/qgsarchive.cpp

@@ -20,6 +20,7 @@
 #include "qgsziputils.h"
 #include "qgsmessagelog.h"
 #include "qgsauxiliarystorage.h"
+#include <iostream>
 
 #include <QStandardPaths>
 #include <QUuid>
@@ -31,7 +32,7 @@ QgsArchive::QgsArchive()
 
 QgsArchive::QgsArchive( const QgsArchive &other )
   : mFiles( other.mFiles )
-  , mDir( new QTemporaryDir() )
+  ,  mDir( new QTemporaryDir() )
 {
 }
 

src/core/qgsarchive.h

@@ -20,7 +20,6 @@
 #define QGSARCHIVE_H
 
 #include "qgis_core.h"
-
 #include <QStringList>
 #include <QTemporaryFile>
 #include <QTemporaryDir>

src/core/qgscoordinatereferencesystem.cpp

@@ -21,6 +21,7 @@
 #include <cmath>
 
 #include <QDir>
+#include <QTemporaryFile>
 #include <QDomNode>
 #include <QDomElement>
 #include <QFileInfo>

src/core/qgsnetworkcontentfetcherregistry.h

@@ -23,12 +23,15 @@
 #include <QMap>
 #include <QMutex>
 #include <QNetworkReply>
+#include <QTemporaryFile>
 
 #include "qgis_core.h"
+
+class QTemporaryFile;
+
 #include "qgstaskmanager.h"
 #include "qgsnetworkcontentfetchertask.h"
 
-class QTemporaryFile;
 
 /**
  * \class QgsFetchedContent

src/core/qgsproject.cpp

@@ -73,7 +73,7 @@
 #endif
 
 // canonical project instance
-std::unique_ptr<QgsProject> QgsProject::sProject;
+QgsProject *QgsProject::sProject = nullptr;
 
 /**
     Take the given scope and key and convert them to a string list of key
@@ -410,33 +410,30 @@ QgsProject::~QgsProject()
 {
   mIsBeingDeleted = true;
 
-  if ( this != sProject.get() )
-    clear();
-
+  clear();
   delete mBadLayerHandler;
   delete mRelationManager;
   delete mLayerTreeRegistryBridge;
   delete mRootGroup;
-
-  if ( this == sProject.get() )
+  if ( this == sProject )
   {
-    sProject.release();
+    sProject = nullptr;
   }
 }
 
 void QgsProject::setInstance( QgsProject *project )
 {
-  sProject.reset( project );
+  sProject = project;
 }
 
 
 QgsProject *QgsProject::instance()
 {
-  if ( !sProject.get() )
+  if ( !sProject )
   {
-    sProject.reset( new QgsProject );
+    sProject = new QgsProject;
   }
-  return sProject.get();
+  return sProject;
 }
 
 void QgsProject::setTitle( const QString &title )

src/core/qgsproject.h

@@ -1385,7 +1385,7 @@ class CORE_EXPORT QgsProject : public QObject, public QgsExpressionContextGenera
 
   private:
 
-    static std::unique_ptr<QgsProject> sProject;
+    static QgsProject *sProject;
 
     /**
      * Set the current project instance to \a project

src/core/qgssettings.cpp

@@ -15,11 +15,9 @@
 
 
 #include <cstdlib>
-
 #include <QFileInfo>
 #include <QSettings>
 #include <QDir>
-#include <QCoreApplication>
 
 #include "qgssettings.h"
 #include "qgslogger.h"

src/crssync/main.cpp

@@ -84,5 +84,5 @@ int main( int argc, char **argv )
     std::cout << -res << " CRSs could not be updated." << std::endl;
   }
 
-  return 0;
+  exit( 0 );
 }

src/gui/qgscolorbutton.cpp

@@ -26,6 +26,7 @@
 #include "qgsguiutils.h"
 
 #include <QPainter>
+#include <QTemporaryFile>
 #include <QMouseEvent>
 #include <QMenu>
 #include <QClipboard>

src/gui/qgscolorbutton.h

@@ -17,6 +17,7 @@
 
 #include <QColorDialog>
 #include <QToolButton>
+#include <QTemporaryFile>
 #include "qgis_gui.h"
 #include "qgis_sip.h"
 

src/gui/symbology/qgsstyleexportimportdialog.cpp

@@ -33,11 +33,8 @@
 #include <QCloseEvent>
 #include <QFileDialog>
 #include <QMessageBox>
-#include <QProgressDialog>
 #include <QPushButton>
 #include <QStandardItemModel>
-#include <QNetworkAccessManager>
-#include <QNetworkReply>
 
 
 QgsStyleExportImportDialog::QgsStyleExportImportDialog( QgsStyle *style, QWidget *parent, Mode mode )

src/gui/symbology/qgsstyleexportimportdialog.h

@@ -19,6 +19,11 @@
 
 #include <QDialog>
 #include <QUrl>
+#include <QProgressDialog>
+#include <QTemporaryFile>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QStandardItem>
 
 #include "ui_qgsstyleexportimportdialogbase.h"
 #include "qgis_gui.h"
@@ -31,10 +36,6 @@ class QgsStyle;
 class QgsStyleGroupSelectionDialog;
 class QgsTemporaryCursorOverride;
 class QgsStyleModel;
-class QTemporaryFile;
-class QProgressDialog;
-class QNetworkAccessManager;
-class QNetworkReply;
 
 /**
  * \ingroup gui