conditionally build with mqtt to allow dev without this deps

Author: raoulh

calaos_installer.pro

@@ -1,4 +1,11 @@
-QT += core gui network widgets xml printsupport mqtt
+QT += core gui network widgets xml printsupport
+
+qtHaveModule(mqtt) {
+    QT += mqtt
+    DEFINES += QT_MQTT_AVAILABLE
+    SOURCES += src/DialogZigbee2mqtt.cpp
+    HEADERS += src/DialogZigbee2mqtt.h
+}
 
 equals(QT_MAJOR_VERSION, 6) {
    QT += core5compat
@@ -19,7 +26,6 @@ CONFIG += c++11
 TARGET = calaos_installer
 TEMPLATE = app
 SOURCES += src/main.cpp \
-    src/DialogZigbee2mqtt.cpp \
     src/SimpleCrypt.cpp \
     src/mainwindow.cpp \
     src/common/base64.c \
@@ -111,7 +117,6 @@ SOURCES += src/main.cpp \
     src/FormActionPush.cpp
 
 HEADERS += src/mainwindow.h \
-    src/DialogZigbee2mqtt.h \
     src/SimpleCrypt.h \
     src/common/Utils.h \
     src/common/base64.h \

src/formrules.cpp

@@ -7,7 +7,10 @@
 #include "DialogNewAVReceiver.h"
 #include "dialognewwebioshutter.h"
 #include "wizards/hue/wizardhue.h"
+
+#ifdef QT_MQTT_AVAILABLE
 #include "DialogZigbee2mqtt.h"
+#endif
 
 FormRules::FormRules(QWidget *parent) :
     QWidget(parent),
@@ -671,6 +674,7 @@ FormRules::FormRules(QWidget *parent) :
                 addCalaosIO(p);
             });
 
+#ifdef QT_MQTT_AVAILABLE
     action = add_menu->addAction(tr("Zigbee2mqtt device"));
     action->setIcon(QIcon(":/img/zigbee2mqtt.png"));
     connect(action, &QAction::triggered, this, [=]()
@@ -691,6 +695,7 @@ FormRules::FormRules(QWidget *parent) :
             addCalaosIO(p);
         }
     });
+#endif
 
     add_menu->addSeparator();