Only comparing the working directory with its first parent revision
is supported. The core logic of dirstate handling and stat’ing files
was already in hg-core supporting Python-based hg with Rust extensions,
so this is mostly plumbing to rhg’s CLI.
For now the command is experimental and disabled by default,
since it has some bugs that causes a number of tests to fail.
These failures can be seen with:
tests/run-tests.py --rhg --extra-config-opt rhg.status=true