python: restructure package

This deserves some explanation.

* tests were moved to separate python/tests subdir
* trezorlib was moved to python/src, so that it does not exist on
PYTHONPATH by default
(see https://blog.ionelmc.ro/2014/05/25/python-packaging/ for details)
* everything was updated to understand the new structure
* trezorctl was changed from a top-level executable script to a module
`trezorlib.cli.trezorctl` and is installed via the entry_points
mechanism.
This should make it work normally on Windows!

The package should be installable as normal through pip and pipenv, no
changes are needed on that side.

The source package from pypi will include unit tests. (Device tests were
completely moved out). Wheel will exclude them, because users don't need
them.
That shrinks the .whl from 520 kB to 270 - nice!

python: reorganize remaining unit tests

python/.gitignore

@@ -3,7 +3,7 @@
 MANIFEST
 /build
 /dist
-/trezor.egg-info
+*.egg-info
 *.bin
 *.py.cache
 /.tox

python/MANIFEST.in

@@ -1,6 +1,7 @@
 recursive-include bash_completion.d *.sh
 include tools/*
-recursive-include trezorlib *
+graft src
+graft tests
 
 include AUTHORS README.md COPYING CHANGELOG.md
 include requirements*.txt

python/Makefile

@@ -2,14 +2,14 @@ PYTHON=python3
 SETUP=$(PYTHON) setup.py
 
 EXCLUDES=.vscode
-STYLE_TARGETS=trezorlib trezorctl setup.py
+STYLE_TARGETS=src/trezorlib setup.py
 EXCLUDE_TARGETS=messages
 
 all: build
 
 clean-gen: ## remove generated files
-	rm -f trezorlib/messages/*.py
-	rm -f trezorlib/coins.json
+	rm -f src/trezorlib/messages/*.py
+	rm -f src/trezorlib/coins.json
 
 coins_json:
 	./helper-scripts/build-coins-json.sh

python/helper-scripts/build-coins-json.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 cd $(dirname $0)/..
 
-DEST=trezorlib/coins.json
+DEST=src/trezorlib/coins.json
 
 BUILD_COINS_AT="../common/tools/cointool.py dump \
     --list --support \

python/setup.cfg

@@ -1,13 +1,11 @@
 [flake8]
-filename =
-    *.py,
-    ./trezorctl
+filename = *.py
 exclude =
     .tox/,
     build/,
     dist/,
     vendor/,
-    trezorlib/messages/__init__.py
+    src/trezorlib/messages/__init__.py
 ignore =
     # E203 whitespace before ':'
     E203,

python/setup.py

@@ -28,7 +28,7 @@ def read(*path):
 
 
 def find_version():
-    version_file = read("trezorlib", "__init__.py")
+    version_file = read("src", "trezorlib", "__init__.py")
     version_match = re.search(r"^__version__ = \"(.*)\"$", version_file, re.M)
     if version_match:
         return version_match.group(1)
@@ -60,9 +60,10 @@ setup(
     long_description="{}\n\n{}".format(read("README.md"), read("CHANGELOG.md")),
     long_description_content_type="text/markdown",
     url="https://github.com/trezor/python-trezor",
-    packages=find_packages(),
+    packages=find_packages("src"),
+    package_dir={"": "src"},
     package_data={"trezorlib": ["coins.json"]},
-    scripts=["trezorctl"],
+    entry_points={"console_scripts": ["trezorctl=trezorlib.cli.trezorctl:cli"]},
     install_requires=install_requires,
     extras_require={
         "hidapi": ["hidapi>=0.7.99.post20"],

python/src/trezorlib/ckd_public.py

@@ -17,6 +17,7 @@
 import hashlib
 import hmac
 import struct
+import warnings
 
 import ecdsa
 from ecdsa.curves import SECP256k1
@@ -25,6 +26,8 @@ from ecdsa.util import number_to_string, string_to_number
 
 from trezorlib import messages, tools
 
+warnings.warn("ckd_public module is deprecated and will be removed", DeprecationWarning)
+
 
 def point_to_pubkey(point):
     order = SECP256k1.order