Rework simplefractions packaging (#28)

This PR reworks the packaging of simplefractions. In detail:

- Eliminate `setup.cfg`
- Move all project configuration into `pyproject.toml`
- Update the `on-commit` workflow to use more recent action versions and to cache packages
- Add a few missing entries to `.gitignore`
- Move flake8 config to `.flake8`, and config of all other tools to `pyproject.toml`
- Move package source under `src/`, so that we can benefit from setuptools automated package detection
- Use `setuptools_scm` to compute get version metadata

Author: mdickinson

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 88

.github/workflows/on-commit.yml

@@ -2,48 +2,45 @@
 
 name: on-commit
 
-on: pull_request
+on: [pull_request, workflow_dispatch]
 
 jobs:
   test:
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        python-version: ['3.6', '3.9', '3.10', 'pypy-3.7']
+        python-version: ['3.6', '3.8', '3.10', '3.11-dev', 'pypy3.9']
 
     steps:
-    - name: Check out the code
-      uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Test with unittest
-      run: |
-        python -m unittest
+        cache: 'pip'
+        cache-dependency-path: 'requirements/test.txt'
+    - name: Install dependencies
+      run: python -m pip install -r requirements/test.txt
+    - name: Test with pytest
+      run: python -m pytest
 
   style:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        python-version: ['3.10']
-
     steps:
-    - name: Check out the code
-      uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v4
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: '3.10'
+        cache: 'pip'
+        cache-dependency-path: 'requirements/style.txt'
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip setuptools wheel
-        python -m pip install black flake8 isort mypy
+      run: python -m pip install -r requirements/style.txt
     - name: Run style checks
       run: |
         python -m flake8 .
-        python -m isort --check .
-        python -m black --check .
+        python -m isort --check --diff .
+        python -m black --check --diff .
         python -m mypy --strict .

.github/workflows/on-release.yml

@@ -0,0 +1,30 @@
+name: on-release
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  build-and-upload:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+        cache: 'pip'
+        cache-dependency-path: 'requirements/publish.txt'
+    - name: Install dependencies
+      run: python -m pip install -r requirements/publish.txt
+    - name: Build sdist and wheel
+      run: python -m build
+    - name: Publish to PyPI
+      env:
+        TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+        TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+      run: |
+        python -m twine check --strict dist/*
+        python -m twine upload dist/*

.gitignore

@@ -1 +1,6 @@
+# Python bytecode
 *.pyc
+
+# Build and distribution
+/dist/
+/src/*.egg-info/

pyproject.toml

@@ -1,3 +1,34 @@
 [build-system]
-requires = ['setuptools', 'wheel']
+requires = ['setuptools>=61', 'setuptools-scm[toml]>=6.2', 'wheel']
 build-backend = 'setuptools.build_meta'
+
+[project]
+name = 'simplefractions'
+description = 'Find the simplest fraction for a given float or interval'
+readme = 'README.md'
+requires-python = '>=3.6'
+license = {file = 'LICENSE'}
+authors = [
+    {name = 'Mark Dickinson', email = '[email protected]'}
+]
+keywords = ['fractions', 'continued fractions', 'approximation']
+classifiers = [
+    'License :: OSI Approved :: Apache Software License',
+    'Operating System :: OS Independent',
+    'Programming Language :: Python :: 3',
+    'Topic :: Scientific/Engineering :: Mathematics',
+]
+dynamic = ['version']
+
+[project.urls]
+source = 'https://github.com/mdickinson/simplefractions'
+
+[tool.black]
+target-version = ['py36']
+
+[tool.isort]
+profile = 'black'
+order_by_type = 'False'
+
+[tool.setuptools_scm]
+version_scheme = 'release-branch-semver'

requirements/publish.txt

@@ -0,0 +1,2 @@
+build
+twine

requirements/style.txt

@@ -0,0 +1,4 @@
+black
+flake8
+isort
+mypy

requirements/test.txt

@@ -0,0 +1 @@
+pytest