pyproject.toml updates to HACKING.md (#1134)

Setup module is missing, use build instead.
Run tests with tox.

.gitattributes

@@ -0,0 +1 @@
+.python-version eol=lf

.python-version

@@ -0,0 +1,5 @@
+3.7.9
+3.8.10
+3.9.13
+3.10.11
+3.11.5

HACKING.md

@@ -12,45 +12,64 @@ $ PYTHONPATH=$PWD/yapf python -m yapf -i -r .
 $ PYTHONPATH=$PWD/yapf python -m yapf -i $(git diff --name-only @{upstream})
 ```
 
-## Releasing a new version
+## Testing and building redistributables locally
+
+YAPF uses tox 3 to test against multiple python versions and to build redistributables.
 
-- Run tests with Python 3.7 and 3.11:
+Tox will opportunistically use pyenv environments when available.
+To configure pyenv run the following in bash:
 
 ```bash
-$ python setup.py test
+$ xargs -t -n1 pyenv install  < .python-version
 ```
 
-- Bump version in `setup.py`.
-
-- Build source distribution:
+Test against all supported Python versions that are currently installed:
+```bash
+$ pipx run --spec='tox<4' tox
+```
 
+Build and test the sdist and wheel against your default Python environment. The redistributables will be in the `dist` directory.
 ```bash
-$ python setup.py sdist
+$ tox -e bdist_wheel -e sdist
 ```
 
-- Check that it looks OK.
-  - Install it onto a virtualenv,
-  - run tests, and
-  - run yapf as a tool.
+## Releasing a new version
 
-- Build release:
+1. Install all expected pyenv environements
+    ```bash
+    $ xargs -t -n1 pyenv install  < .python-version
+    ```
 
-```bash
-$ python setup.py sdist bdist_wheel
-```
+1. Run tests against Python 3.7 - 3.11 with
+    ```bash
+    $ pipx run --spec='tox<4' tox
+    ```
 
-- Push to PyPI:
+1. Bump version in `pyproject.toml`.
 
-```bash
-$ twine upload dist/*
-```
+1. Build and test redistributables
+
+    ```bash
+    $ pipx run --spec='tox<4' tox -e bdist_wheel -e sdist
+    ```
+
+1. Check that it looks OK.
+   1. Install it onto a virtualenv,
+   1. run tests, and
+   1. run yapf as a tool.
 
-- Test in a clean virtualenv that 'pip install yapf' works with the new
+1. Push to PyPI:
+
+    ```bash
+    $ pipx run twine upload dist/*
+    ```
+
+1. Test in a clean virtualenv that 'pip install yapf' works with the new
   version.
 
-- Commit the version bump and add tag with:
+1. Commit the version bump and add tag with:
 
-```bash
-$ git tag v$(VERSION_NUM)
-$ git push --tags
-```
+    ```bash
+    $ git tag v$(VERSION_NUM)
+    $ git push --tags
+    ```

tox.ini

@@ -1,6 +1,19 @@
 [tox]
-envlist=py37,py38,py39,py310
+requires =
+    tox<4
+    tox-pyenv
+    tox-wheel
+envlist = py37,py38,py39,py310,py311
+# tox-wheel alias for `wheel_pep517 = true`
+isolated_build = True
+distshare = ./dist
 
 [testenv]
-commands=
-    python -m unittest discover -p '*_test.py' yapftests/
+wheel = True
+wheel_build_env = bdist_wheel
+commands = python -m unittest discover -p '*_test.py' yapftests/
+
+[testenv:bdist_wheel]
+
+[testenv:sdist]
+wheel = False