Support seperate versions of installed modules

QML supports versioned types in modules. There's a version major and a
version minor.

This makes it possible to have a module com.organisation.fancycomponents
with version 1.0, and later you could ship a new module
com.organisation.fancycomponents which contains a more recent version 1.1
or 2.0 AND also the old versions to keep old code running.

This is good.

The problem is that this is difficult with certain QA procedures. It's
hard to verify that a new module is indeed 100% compatible with the
previous versions.

The change extends the import mechanism by adding optional versioning to
the component patch.

With the patch, you can add a new module
com.organisation.fancycomponents.2.0 which will be loaded when the
QML file specifies "import com.organisation.fancycomponents 2.0".

The patch works as follows: if you try to load
com.organisation.fancycomponents in version 2.0, the engine first
looks for com/organisation/fancycomponents.2.0, then for
com/organisation/fancycomponents.2 then for
com.organisation/fancycomponents.

Reviewed-by: Aaron Kennedy
Task-number: QTBUG-16455

2 files changed, 93 insertions, 0 deletions

diff --git a/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.2.pro b/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.2.pro
new file mode 100644
index 0000000..d254642
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.2.pro
@@ -0,0 +1,9 @@
+TEMPLATE = lib
+CONFIG += plugin
+SOURCES = plugin.cpp
+QT = core declarative
+DESTDIR = ../imports/com/nokia/AutoTestQmlPluginType.2
+
+symbian: {
+    TARGET.EPOCALLOWDLLDATA=1
+}
diff --git a/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.cpp b/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.cpp
new file mode 100644
index 0000000..6bd8542
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativemoduleplugin/plugin.2/plugin.cpp
@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QStringList>
+#include <QtDeclarative/qdeclarativeextensionplugin.h>
+#include <QtDeclarative/qdeclarative.h>
+#include <QDebug>
+
+class MyPluginType : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(int value READ value WRITE setValue)
+    Q_PROPERTY(int valueOnlyIn2 READ value WRITE setValue)
+
+public:
+    MyPluginType(QObject *parent=0) : QObject(parent)
+    {
+        qWarning("import2 worked");
+    }
+
+    int value() const { return v; }
+    void setValue(int i) { v = i; }
+
+private:
+    int v;
+};
+
+
+class MyPlugin : public QDeclarativeExtensionPlugin
+{
+    Q_OBJECT
+public:
+    MyPlugin()
+    {
+        qWarning("plugin2 created");
+    }
+
+    void registerTypes(const char *uri)
+    {
+        Q_ASSERT(QLatin1String(uri) == "com.nokia.AutoTestQmlPluginType");
+        qmlRegisterType<MyPluginType>(uri, 2, 0, "MyPluginType");
+    }
+};
+
+#include "plugin.moc"
+
+Q_EXPORT_PLUGIN2(plugin, MyPlugin);