accomodate in-tree builds

CMakeLists.txt

@@ -24,9 +24,14 @@ add_custom_command(OUTPUT varnishlog-json_options.rst
 add_custom_command(OUTPUT varnishlog-json_synopsis.rst
 		   COMMAND "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json" --synopsis > "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json_synopsis.rst"
 		   DEPENDS varnishlog-json)
-add_custom_command(OUTPUT varnishlog-json.rst
-		   COMMAND cp "${CMAKE_CURRENT_SOURCE_DIR}/varnishlog-json.rst" "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json.rst"
-		   DEPENDS varnishlog-json varnishlog-json.rst)
+# varnishlog-json.rst includes file from the build directory, so it needs to be copied over BUT
+# only if source != build, otherwise we'd copy it over itself
+if(NOT "${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}")
+	message(STATUS "-----------------------NOT EQUAL ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}")
+	add_custom_command(OUTPUT varnishlog-json.rst
+			   COMMAND cp "${CMAKE_CURRENT_SOURCE_DIR}/varnishlog-json.rst" "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json.rst"
+			   DEPENDS varnishlog-json varnishlog-json.rst)
+endif()
 add_custom_command(OUTPUT varnishlog-json.1
 		   COMMAND ${RST2MAN} "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json.rst" "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json.1"
 		   DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/varnishlog-json.rst" varnishlog-json_options.rst varnishlog-json_synopsis.rst)