Add download to ext proj

.gitignore

 *.swp
+*.swo
 build

CMakeLists.txt

@@ -14,20 +14,25 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR}
     You may need to remove CMakeCache.txt and CMakeFiles dir. ")
 endif()
 
-# check required modules are present
-if(NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/../CORE")
-    message("This module requires CORE module for compilation.")
-    message(FATAL_ERROR "CORE module not found.")
-endif()
-
 include(ExternalProject)
 ExternalProject_Add(Tadah.CORE
+    GIT_REPOSITORY git@git.ecdf.ed.ac.uk:tadah/core.git
+    GIT_TAG main
     SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../CORE
+    PATCH_COMMAND  mkdir -p build
     BINARY_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../CORE/build
     INSTALL_COMMAND cmake -E echo "Skipping install step."
     )
+
+# check required modules are present
+if(NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/../CORE")
+    message("This module requires CORE module for compilation.")
+    message(FATAL_ERROR "CORE module not found.")
+endif()
+
 link_directories(${CMAKE_CURRENT_SOURCE_DIR}/../CORE/build)
 
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)