QmlDesigner: Do not require a qmake project for designer import paths

Let's enable all build system plugins to provide this information.

Task-number: QTCREATORBUG-20810
Change-Id: I0ef953e3c2c9a2be1fc4187e93232e9a2aeacafd
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/projectexplorer/project.cpp

@@ -855,6 +855,13 @@ Utils::MacroExpander *Project::macroExpander() const
     return &d->m_macroExpander;
 }
 
+QVariant Project::additionalData(Core::Id id, const Target *target) const
+{
+    Q_UNUSED(id);
+    Q_UNUSED(target);
+    return QVariant();
+}
+
 bool Project::isParsing() const
 {
     return d->m_isParsing;

src/plugins/projectexplorer/project.h

@@ -166,6 +166,8 @@ public:
     void setup(const QList<const BuildInfo *> &infoList);
     Utils::MacroExpander *macroExpander() const;
 
+    virtual QVariant additionalData(Core::Id id, const Target *target) const;
+
     bool isParsing() const;
     bool hasParsingData() const;
 

src/plugins/projectexplorer/target.cpp

@@ -673,6 +673,11 @@ void Target::setNamedSettings(const QString &name, const QVariant &value)
         d->m_pluginSettings.insert(name, value);
 }
 
+QVariant Target::additionalData(Core::Id id) const
+{
+    return project()->additionalData(id, this);
+}
+
 void Target::updateDeviceState()
 {
     IDevice::ConstPtr current = DeviceKitInformation::device(kit());

src/plugins/projectexplorer/target.h

@@ -120,6 +120,8 @@ public:
     QVariant namedSettings(const QString &name) const;
     void setNamedSettings(const QString &name, const QVariant &value);
 
+    QVariant additionalData(Core::Id id) const;
+
     template<typename S, typename R, typename T>
     void subscribeSignal(void (S::*sig)(), R*recv, T (R::*sl)()) {
         new Internal::TargetSubscription([sig, recv, sl, this](ProjectConfiguration *pc) {

src/plugins/qmakeprojectmanager/qmakeproject.cpp

@@ -1378,6 +1378,13 @@ QString QmakeProject::mapProFilePathToTarget(const FileName &proFilePath)
     return pro ? pro->targetInformation().target : QString();
 }
 
+QVariant QmakeProject::additionalData(Core::Id id, const Target *target) const
+{
+    if (id == "QmlDesignerImportPath")
+        return rootProjectNode()->variableValue(Variable::QmlDesignerImportPath);
+    return Project::additionalData(id, target);
+}
+
 } // namespace QmakeProjectManager
 
 #include "qmakeproject.moc"

src/plugins/qmakeprojectmanager/qmakeproject.h

@@ -111,6 +111,8 @@ public:
 
     QString mapProFilePathToTarget(const Utils::FileName &proFilePath);
 
+    QVariant additionalData(Core::Id id, const ProjectExplorer::Target *target) const final;
+
 signals:
     void proFileUpdated(QmakeProjectManager::QmakeProFile *pro, bool, bool);
     void buildDirectoryInitialized();

src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp

@@ -39,9 +39,8 @@
 #include <projectexplorer/kit.h>
 #include <projectexplorer/project.h>
 #include <projectexplorer/projectexplorerconstants.h>
+#include <projectexplorer/target.h>
 #include <projectexplorer/toolchain.h>
-#include <qmakeprojectmanager/qmakeproject.h>
-#include <qmakeprojectmanager/qmakenodes.h>
 #include <coreplugin/messagebox.h>
 #include <coreplugin/icore.h>
 #include <qtsupport/baseqtversion.h>
@@ -468,12 +467,10 @@ QProcessEnvironment PuppetCreator::processEnvironment() const
     if (!styleConfigFileName.isEmpty())
         environment.appendOrSet("QT_QUICK_CONTROLS_CONF", styleConfigFileName);
 
-    if (m_currentProject) {
-        auto qmakeProject = qobject_cast<QmakeProjectManager::QmakeProject *>(m_currentProject);
-        if (qmakeProject) {
-            QStringList designerImports = qmakeProject->rootProjectNode()->variableValue(QmakeProjectManager::Variable::QmlDesignerImportPath);
-            importPaths.append(designerImports);
-        }
+    if (m_currentProject && m_currentProject->activeTarget()) {
+        QStringList designerImports = m_currentProject->activeTarget()
+                ->additionalData("QmlDesignerImportPath").toStringList();
+        importPaths.append(designerImports);
     }
 
     if (m_availablePuppetType == FallbackPuppet)