packaging: add deb/flatpak build flow and desktop metadata

CMakeLists.txt

@@ -10,6 +10,8 @@ set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTOUIC ON)
 set(CMAKE_AUTORCC ON)
 
+include(GNUInstallDirs)
+
 find_package(Qt6 6.2 REQUIRED COMPONENTS Widgets Sql)
 
 qt_standard_project_setup()
@@ -126,4 +128,46 @@ else()
     message(FATAL_ERROR "Vendored FreeRDP targets were not produced as expected.")
 endif()
 
-install(TARGETS orbithub RUNTIME DESTINATION bin)
+set_target_properties(orbithub PROPERTIES
+    BUILD_RPATH_USE_ORIGIN ON
+    INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}/orbithub"
+    INSTALL_RPATH_USE_LINK_PATH ON
+)
+
+install(TARGETS orbithub
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+
+set(ORBITHUB_PRIVATE_LIB_DESTINATION "${CMAKE_INSTALL_LIBDIR}/orbithub")
+set(ORBITHUB_RUNTIME_TARGETS KodoTerm freerdp winpr)
+if(TARGET freerdp-client)
+    list(APPEND ORBITHUB_RUNTIME_TARGETS freerdp-client)
+endif()
+foreach(runtime_target IN LISTS ORBITHUB_RUNTIME_TARGETS)
+    if(TARGET ${runtime_target})
+        install(TARGETS ${runtime_target}
+            RUNTIME DESTINATION ${ORBITHUB_PRIVATE_LIB_DESTINATION}
+            LIBRARY DESTINATION ${ORBITHUB_PRIVATE_LIB_DESTINATION}
+            ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        )
+    endif()
+endforeach()
+
+install(FILES
+    packaging/linux/io.orbithub.OrbitHub.desktop
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/applications
+)
+install(FILES
+    packaging/linux/io.orbithub.OrbitHub.svg
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps
+)
+install(FILES
+    packaging/linux/io.orbithub.OrbitHub.svg
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps
+    RENAME orbithub.svg
+)
+install(FILES
+    packaging/linux/io.orbithub.OrbitHub.metainfo.xml
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/metainfo
+)
+install(FILES LICENSE DESTINATION ${CMAKE_INSTALL_DATADIR}/licenses/orbithub)