meson/docs/markdown/snippets/deprecate_source_build_root.md

meson.build_root() and meson.source_root() are deprecated

Those function are common source of issue when used in a subproject because they point to the parent project root which is rarely what is expected and is a violation of subproject isolation.

meson.current_source_dir() and meson.current_build_dir() should be used instead and have been available in all Meson versions. New functions meson.project_source_root() and meson.project_build_root() have been added in Meson 0.56.0 to get the root of the current (sub)project.