This helps when you try to build python-trezor from a subdirectory
of trezor-core, for whatever reason.
(For instance, when you run 'pipenv install' in trezor-core, and also
happen to have protobuf build tools available in the outside environment)
We can now selectively runxfail certain tests. This is useful for
accepting PRs into trezor-core:
1. trezor-core is going to get a pytest.ini that sets xfail_strict.
That means that if an `xfail`ed test actually passes, that will
break the test suite. So it will be visible when we implement
a feature for which tests exist.
2. To allow PRs to pass the test suite without touching python-trezor
directly, we add a new pytest.ini option: run_xfail.
This adds a list of markers which will ignore `xfail`.
So:
2.1 First, the python-trezor PR marks the tests with the name
of the feature. This commit already does that: Lisk tests
are marked `@pytest.mark.lisk`, NEMs are `@pytest.mark.nem`,
etc.
The tests will be also marked with `xfail`, because the
feature is not in core yet.
2.2 Then, the trezor-core PR implements the feature, which makes
the `xfail`ed tests pass. That breaks the test suite.
2.3 To fix the test suite, the core PR also adds a `run_xfail`
to `pytest.ini`: `run_xfail = lisk`.
(it can take a list: `run_xfail = lisk nem stellar`)
That will make the test suite behave as if the tests are not
`xfail`ed. If the feature is implemented correctly, the tests
will pass.
2.4 When the PR is accepted to core, the next step should be
a PR to python-trezor that removes the `xfail`s. After that,
we should also remove the `run_xfail` option, just to be tidy.
We only need ethereum libraries for `ethereum_sign_tx` in trezorctl,
and rlp has caused us dependency problems in the past already.
Also we required ethjsonrpc for the same thing but never listed
that dependency anywhere.
That changes now.
This drops the command line options. `libusb` is now required
unconditionally (it's cffi so no harm there). hidapi is an extra.
You either need to install it manually, or specify it in your
requirements.txt like so:
trezor[hidapi] >= 0.9.2
So, 'python setup.py develop' exists. And of course it doesn't have build_py as
a dependency, because of course it doesn't.
We could use 'data_files' instead of 'package_data and copying', and then use
pkg_resources to find the actual file location, and that could work in theory.
But pkg_resources API is weird and messy and this whole area of Python
packaging theory barely works as it is.
Instead we will force the prebuild command to be a dependency of develop as
well as build_py, and we do this by monkey-patching instead of the proper way,
because at this point it seems cleaner. I wonder if there are more commands
that would need this.
