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1 files changed, 34 insertions, 12 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index be6c9d938e..8e9d4a843d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,11 +1,10 @@
-project(cura NONE)
-cmake_minimum_required(VERSION 2.8.12)
-
-set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/
-                      ${CMAKE_MODULE_PATH})
+project(cura)
+cmake_minimum_required(VERSION 3.6)
 
 include(GNUInstallDirs)
 
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
+
 set(URANIUM_DIR "${CMAKE_SOURCE_DIR}/../Uranium" CACHE DIRECTORY "The location of the Uranium repository")
 set(URANIUM_SCRIPTS_DIR "${URANIUM_DIR}/scripts" CACHE DIRECTORY "The location of the scripts directory of the Uranium repository")
 
@@ -28,6 +27,29 @@ set(CURA_CLOUD_API_VERSION "" CACHE STRING "Alternative Cura cloud API version")
 configure_file(${CMAKE_SOURCE_DIR}/cura.desktop.in ${CMAKE_BINARY_DIR}/cura.desktop @ONLY)
 configure_file(cura/CuraVersion.py.in CuraVersion.py @ONLY)
 
+
+# FIXME: Remove the code for CMake <3.12 once we have switched over completely.
+# FindPython3 is a new module since CMake 3.12. It deprecates FindPythonInterp and FindPythonLibs. The FindPython3
+# module is copied from the CMake repository here so in CMake <3.12 we can still use it.
+if(${CMAKE_VERSION} VERSION_LESS 3.12)
+    # Use FindPythonInterp and FindPythonLibs for CMake <3.12
+    find_package(PythonInterp 3 REQUIRED)
+    find_package(PythonLibs 3 REQUIRED)
+
+    set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})
+    set(Python3_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS})
+    set(Python3_LIBRARIES ${PYTHON_LIBRARIES})
+
+    set(Python3_VERSION ${PYTHON_VERSION_STRING})
+    set(Python3_VERSION_MAJOR ${PYTHON_VERSION_MAJOR})
+    set(Python3_VERSION_MINOR ${PYTHON_VERSION_MINOR})
+    set(Python3_VERSION_PATCH ${PYTHON_VERSION_PATCH})
+else()
+    # Use FindPython3 for CMake >=3.12
+    find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
+endif()
+
+
 if(NOT ${URANIUM_DIR} STREQUAL "")
     set(CMAKE_MODULE_PATH "${URANIUM_DIR}/cmake")
 endif()
@@ -40,12 +62,12 @@ if(NOT ${URANIUM_SCRIPTS_DIR} STREQUAL "")
     CREATE_TRANSLATION_TARGETS()
 endif()
 
-find_package(PythonInterp 3.5.0 REQUIRED)
 
 install(DIRECTORY resources
         DESTINATION ${CMAKE_INSTALL_DATADIR}/cura)
 install(DIRECTORY plugins
         DESTINATION lib${LIB_SUFFIX}/cura)
+
 if(NOT APPLE AND NOT WIN32)
     install(FILES cura_app.py
             DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -53,16 +75,16 @@ if(NOT APPLE AND NOT WIN32)
             RENAME cura)
     if(EXISTS /etc/debian_version)
         install(DIRECTORY cura
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}/dist-packages
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}/dist-packages
             FILES_MATCHING PATTERN *.py)
         install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}/dist-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}/dist-packages/cura)
     else()
         install(DIRECTORY cura
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages
             FILES_MATCHING PATTERN *.py)
         install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages/cura)
     endif()
     install(FILES ${CMAKE_BINARY_DIR}/cura.desktop
             DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
@@ -78,8 +100,8 @@ else()
             DESTINATION ${CMAKE_INSTALL_BINDIR}
             PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
     install(DIRECTORY cura
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages
             FILES_MATCHING PATTERN *.py)
     install(FILES ${CMAKE_BINARY_DIR}/CuraVersion.py
-            DESTINATION lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages/cura)
+            DESTINATION lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages/cura)
 endif()