Make NetworkManagerQt and BluezQt optional

While it is most certainly sensible and helpful on a system equipped
with Bluetooth and Wi-Fi hardware, it serves no purpose on a desktop
system without these and just pulls in a long chain of unwanted
dependencies.

CMakeLists.txt

@@ -22,9 +22,32 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 endif()
 
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Widgets DBus X11Extras)
-find_package(KF5 REQUIRED COMPONENTS Activities Auth IdleTime Config DBusAddons Solid I18n GlobalAccel KIO NotifyConfig Screen KDELibs4Support Wayland NetworkManagerQt BluezQt)
+find_package(KF5 REQUIRED COMPONENTS Activities Auth IdleTime Config DBusAddons Solid I18n GlobalAccel KIO NotifyConfig Screen KDELibs4Support Wayland)
 find_package(LibKWorkspace CONFIG REQUIRED)
 
+find_package(KF5BluezQt)
+set_package_properties(KF5BluezQt
+    PROPERTIES DESCRIPTION "Qt wrapper for BlueZ 5 DBus API"
+    TYPE OPTIONAL
+    PURPOSE "Support for wireless energy saving actions"
+)
+find_package(KF5NetworkManagerQt)
+set_package_properties(KF5NetworkManagerQt
+    PROPERTIES DESCRIPTION "Qt wrapper for NetworkManager API"
+    TYPE OPTIONAL
+    PURPOSE "Support for wireless energy saving actions"
+)
+
+set(HAVE_WIRELESS_SUPPORT FALSE)
+if(KF5NetworkManagerQt_FOUND AND KF5BluezQt_FOUND)
+    set(HAVE_WIRELESS_SUPPORT TRUE)
+endif()
+add_feature_info(
+    "Wireless power saving"
+    HAVE_WIRELESS_SUPPORT
+    "Support turning off signal-transmitting devices to save energy"
+)
+
 find_package(UDev REQUIRED)
 
 find_package(XCB REQUIRED COMPONENTS XCB RANDR DPMS)

daemon/CMakeLists.txt

@@ -19,9 +19,14 @@ set(powerdevil_bundled_actions_SRCS
     actions/bundled/dimdisplay.cpp
     actions/bundled/runscript.cpp
     actions/bundled/handlebuttonevents.cpp
-    actions/bundled/wirelesspowersaving.cpp
 )
 
+if(HAVE_WIRELESS_SUPPORT)
+    set(powerdevil_bundled_actions_SRCS ${powerdevil_bundled_actions_SRCS}
+        actions/bundled/wirelesspowersaving.cpp
+    )
+endif()
+
 # target no.1 - powerdevil core library
 set(powerdevilcore_SRCS
     powerdevil_debug.cpp
@@ -49,8 +54,10 @@ qt5_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerMana
                      actions/bundled/handlebuttonevents.h PowerDevil::BundledActions::HandleButtonEvents)
 qt5_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.SuspendSession.xml
                      actions/bundled/suspendsession.h PowerDevil::BundledActions::SuspendSession)
-qt5_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.WirelessPowerSaving.xml
-                     actions/bundled/wirelesspowersaving.h PowerDevil::BundledActions::WirelessPowerSaving)
+if(HAVE_WIRELESS_SUPPORT)
+    qt5_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.WirelessPowerSaving.xml
+                         actions/bundled/wirelesspowersaving.h PowerDevil::BundledActions::WirelessPowerSaving)
+endif()
 
 add_library(powerdevilcore SHARED ${powerdevilcore_SRCS} ${powerdevil_bundled_actions_SRCS})
 set_target_properties(powerdevilcore PROPERTIES VERSION ${POWERDEVIL_CORE_VERSION_STRING} SOVERSION ${POWERDEVIL_CORE_VERSION_MAJOR})
@@ -70,11 +77,16 @@ target_link_libraries(powerdevilcore
     KF5::WidgetsAddons
     KF5::Notifications
     KF5::XmlGui
-    KF5::NetworkManagerQt
-    KF5::BluezQt
     PW::KWorkspace
 )
 
+if(HAVE_WIRELESS_SUPPORT)
+    target_link_libraries(powerdevilcore
+        KF5::NetworkManagerQt
+        KF5::BluezQt
+    )
+endif()
+
 if (XCB_FOUND) # kwin kscreen helper effect
     target_link_libraries(powerdevilcore Qt5::X11Extras XCB::XCB)
 endif ()

daemon/actions/bundled/CMakeLists.txt

@@ -19,8 +19,9 @@ add_powerdevil_bundled_action(keyboardbrightnesscontrol)
 add_powerdevil_bundled_action(dimdisplay)
 add_powerdevil_bundled_action(runscript KF5::KIOCore KF5::KIOWidgets)
 add_powerdevil_bundled_action(suspendsession KF5::KIOCore KF5::KIOWidgets KF5::Solid KF5::KDELibs4Support)
-add_powerdevil_bundled_action(wirelesspowersaving KF5::NetworkManagerQt KF5::BluezQt)
-
+if(HAVE_WIRELESS_SUPPORT)
+    add_powerdevil_bundled_action(wirelesspowersaving KF5::NetworkManagerQt KF5::BluezQt)
+endif()
 
 set(actionconfig_SRCS handlebuttoneventsconfig.cpp)
 qt5_add_dbus_interface(actionconfig_SRCS

daemon/config-powerdevil.h.cmake

@@ -1,2 +1,5 @@
 /* Defines if you have XCB */
 #cmakedefine HAVE_XCB 1
+
+/* Define to 1 if you have NetworkManagerQt and BluezQt libs. */
+#cmakedefine HAVE_WIRELESS_SUPPORT 1

daemon/powerdevilactionpool.cpp

@@ -24,6 +24,8 @@
 #include "powerdevilcore.h"
 #include "powerdevil_debug.h"
 
+#include <config-powerdevil.h>
+
 #include <KConfigGroup>
 #include <KServiceTypeTrader>
 #include <KPluginInfo>
@@ -38,7 +40,9 @@
 #include "actions/bundled/dimdisplay.h"
 #include "actions/bundled/runscript.h"
 #include "actions/bundled/handlebuttonevents.h"
+#ifdef HAVE_WIRELESS_SUPPORT
 #include "actions/bundled/wirelesspowersaving.h"
+#endif
 
 namespace PowerDevil
 {
@@ -127,7 +131,9 @@ void ActionPool::init(PowerDevil::Core *parent)
     m_actionPool.insert("DimDisplay", new BundledActions::DimDisplay(parent));
     m_actionPool.insert("RunScript", new BundledActions::RunScript(parent));
     m_actionPool.insert("HandleButtonEvents", new BundledActions::HandleButtonEvents(parent));
+#ifdef HAVE_WIRELESS_SUPPORT
     m_actionPool.insert("WirelessPowerSaving", new BundledActions::WirelessPowerSaving(parent));
+#endif
 
     // Verify support
     QHash<QString,Action*>::iterator i = m_actionPool.begin();