Follow PEP 518

pyproject.toml

@@ -0,0 +1,35 @@
+# https://snarky.ca/what-the-heck-is-pyproject-toml/
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
+
+# Need to use legacy format for the time being
+# https://tox.readthedocs.io/en/3.20.0/example/basic.html#pyproject-toml-tox-legacy-ini
+[tool.tox]
+legacy_tox_ini = """
+[tox]
+envlist = py35,py36,py37,py38
+
+[testenv]
+deps =
+    -rrequirements.txt
+    -roptional-requirements.txt
+    -rdev-requirements.txt
+commands =
+    # NOTE: you can run any command line tool here - not just tests
+    pytest {posargs}
+
+# run with tox -e flake
+[testenv:flake]
+deps =
+    -rrequirements.txt
+    -roptional-requirements.txt
+    -rdev-requirements.txt
+    flake8
+commands =
+    # stop the build if there are Python syntax errors or undefined names
+    flake8 telethon/ telethon_generator/ tests/ --count --select=E9,F63,F7,F82 --show-source --statistics
+    # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+    flake8 telethon/ telethon_generator/ tests/ --count --exit-zero --exclude telethon/tl/,telethon/errors/rpcerrorlist.py --max-complexity=10 --max-line-length=127 --statistics
+
+"""