Replace conan packages with ExternalProject_Add

CMakeLists.txt.angelscript.in

@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 2.8.12)
+
+project(angelscript-download NONE)
+
+include(ExternalProject)
+
+ExternalProject_Add(AngelscriptProj
+        GIT_REPOSITORY https://git.p-epsilon.com/Deukhoofd/Angelscript.git
+        GIT_TAG master
+        PREFIX "${CMAKE_CURRENT_BINARY_DIR}/Angelscript"
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND ""
+        TEST_COMMAND ""
+        )
+
+function(include_angelscript)
+    configure_file(CMakeLists.txt.angelscript.in Angelscript/download/CMakeLists.txt)
+    execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+            RESULT_VARIABLE result
+            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Angelscript/download)
+    if (result)
+        message(FATAL_ERROR "CMake step for angelscript failed: ${result}")
+    endif ()
+    execute_process(COMMAND ${CMAKE_COMMAND} --build .
+            RESULT_VARIABLE result
+            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Angelscript/download)
+    if (result)
+        message(FATAL_ERROR "Build step for angelscript failed: ${result}")
+    endif ()
+
+    SET(BUILD_SHARED_LIBS ${SHARED})
+    SET(LINK_STD_STATICALLY ${STATICC})
+    add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/Angelscript/src/AngelscriptProj/angelscript/projects/cmake
+            ${CMAKE_CURRENT_BINARY_DIR}/Angelscript/bin
+            EXCLUDE_FROM_ALL)
+
+    execute_process(COMMAND mkdir -p ${CMAKE_CURRENT_BINARY_DIR}/Angelscript/include)
+    include_directories(SYSTEM ${CMAKE_CURRENT_BINARY_DIR}/Angelscript/src/AngelscriptProj/angelscript/include)
+endfunction()