From 86d3932a16459768a22073eeed6263a74550ff1b Mon Sep 17 00:00:00 2001
From: Adriaan de Groot <groot@kde.org>
Date: Sun, 26 Jun 2022 23:06:31 +0200
Subject: [PATCH] [calamares] Hook up to KDSAG again (instead of DBus
 activation)

---
 3rdparty/kdsingleapplication/CMakeLists.txt |  3 +++
 CMakeLists.txt                              | 11 ++---------
 src/calamares/CMakeLists.txt                |  6 +-----
 src/calamares/main.cpp                      | 20 ++++++++++++++++----
 4 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/3rdparty/kdsingleapplication/CMakeLists.txt b/3rdparty/kdsingleapplication/CMakeLists.txt
index aca2df70b..6c0b8e9c0 100644
--- a/3rdparty/kdsingleapplication/CMakeLists.txt
+++ b/3rdparty/kdsingleapplication/CMakeLists.txt
@@ -1,3 +1,5 @@
+set(KDSINGLEAPPLICATION_STATIC ON)
+
 set(KDSINGLEAPPLICATION_SRCS kdsingleapplication.cpp kdsingleapplication_localsocket.cpp)
 
 set(KDSINGLEAPPLICATION_INSTALLABLE_INCLUDES kdsingleapplication.h kdsingleapplication_lib.h)
@@ -11,6 +13,7 @@ else()
     add_library(kdsingleapplication SHARED ${KDSINGLEAPPLICATION_INSTALLABLE_INCLUDES} ${KDSINGLEAPPLICATION_SRCS})
     target_compile_definitions(kdsingleapplication PRIVATE KDSINGLEAPPLICATION_SHARED_BUILD)
 endif()
+set_target_properties( kdsingleapplication PROPERTIES AUTOMOC TRUE )
 
 set(KDSINGLEAPPLICATION_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR}/kdsingleapplication)
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 707a45c00..6eaa5cebf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -321,7 +321,7 @@ if(ECM_FOUND)
     include(KDEInstallDirs)
 endif()
 
-find_package(KF5 QUIET COMPONENTS CoreAddons Crash DBusAddons)
+find_package(KF5 QUIET COMPONENTS CoreAddons Crash)
 set_package_properties(
     KF5::CoreAddons
     PROPERTIES
@@ -330,14 +330,6 @@ set_package_properties(
     URL "https://api.kde.org/frameworks/kcoreaddons/"
     PURPOSE "About Calamares"
 )
-set_package_properties(
-    KF5::DBusAddons
-    PROPERTIES
-    TYPE REQUIRED
-    DESCRIPTION "Classes for DBus activation"
-    URL "https://api.kde.org/frameworks/dbusaddons/"
-    PURPOSE "Unique instance of Calamares"
-)
 if(NOT KF5Crash_FOUND)
     if(BUILD_KF5Crash)
         message(WARNING "BUILD_KF5Crash is set, but KF5::Crash is not available.")
@@ -551,6 +543,7 @@ include(GNUInstallDirs)
 # libraries for Calamares.
 set(Calamares_LIBRARIES calamares)
 
+add_subdirectory(3rdparty/kdsingleapplication)
 add_subdirectory(src)
 
 add_feature_info(Python ${WITH_PYTHON} "Python job modules")
diff --git a/src/calamares/CMakeLists.txt b/src/calamares/CMakeLists.txt
index b132f186a..291297494 100644
--- a/src/calamares/CMakeLists.txt
+++ b/src/calamares/CMakeLists.txt
@@ -36,13 +36,9 @@ calamares_automoc( calamares_bin )
 calamares_autouic( calamares_bin )
 calamares_autorcc( calamares_bin )
 
-if(kdsagSources)
-    set_source_files_properties(${kdsagSources} PROPERTIES AUTOMOC OFF)
-endif()
-
 target_link_libraries(
     calamares_bin
-    PRIVATE calamares calamaresui calamares-i18n Qt5::Core Qt5::Widgets KF5::CoreAddons KF5::DBusAddons
+    PRIVATE calamares calamaresui calamares-i18n kdsingleapplication Qt5::Core Qt5::Widgets KF5::CoreAddons
 )
 if(BUILD_KF5Crash)
     target_link_libraries(calamares_bin PRIVATE KF5::Crash)
diff --git a/src/calamares/main.cpp b/src/calamares/main.cpp
index fcc946485..495127881 100644
--- a/src/calamares/main.cpp
+++ b/src/calamares/main.cpp
@@ -16,8 +16,10 @@
 #include "utils/Logger.h"
 #include "utils/Retranslator.h"
 
+// From 3rdparty/
+#include "kdsingleapplication.h"
+
 #include <KCoreAddons/KAboutData>
-#include <KDBusAddons/KDBusService>
 #ifdef BUILD_KF5Crash
 #include <KCrash/KCrash>
 #endif
@@ -26,6 +28,8 @@
 #include <QDebug>
 #include <QDir>
 
+#include <memory>
+
 /** @brief Gets debug-level from -D command-line-option
  *
  * If unset, use LOGERROR (corresponding to -D1), although
@@ -124,9 +128,17 @@ main( int argc, char* argv[] )
     KCrash::setFlags( KCrash::SaferDialog | KCrash::AlwaysDirectly );
 #endif
 
-    bool is_debug = handle_args( a );
-
-    KDBusService service( is_debug ? KDBusService::Multiple : KDBusService::Unique );
+    std::unique_ptr< KDSingleApplication > possiblyUnique;
+    const bool is_debug = handle_args( a );
+    if ( !is_debug )
+    {
+        possiblyUnique = std::make_unique< KDSingleApplication >();
+        if ( !possiblyUnique->isPrimaryInstance() )
+        {
+            qCritical() << "Calamares is already running.";
+            return 87;  // EUSERS on Linux
+        }
+    }
 
     Calamares::Settings::init( is_debug );
     if ( !Calamares::Settings::instance() || !Calamares::Settings::instance()->isValid() )