build: modernize build process

- Move to `pyproject.toml`
- Update support to 3.8+

Author: scanny

Makefile

@@ -1,49 +1,55 @@
 BEHAVE = behave
 MAKE   = make
-PYTHON = python
-SETUP  = $(PYTHON) ./setup.py
-TWINE  = $(PYTHON) -m twine
-
-.PHONY: accept build clean cleandocs coverage docs opendocs
 
+.PHONY: help
 help:
 	@echo "Please use \`make <target>' where <target> is one or more of"
-	@echo "  accept    run acceptance tests using behave"
-	@echo "  clean     delete intermediate work product and start fresh"
-	@echo "  cleandocs delete cached HTML documentation and start fresh"
-	@echo "  coverage  run nosetests with coverage"
-	@echo "  docs      build HTML documentation using Sphinx (incremental)"
-	@echo "  opendocs  open local HTML documentation in browser"
-	@echo "  readme    update README.html from README.rst"
-	@echo "  sdist     generate a source distribution into dist/"
-	@echo "  upload    upload distribution tarball to PyPI"
-
+	@echo "  accept       run acceptance tests using behave"
+	@echo "  build        generate both sdist and wheel suitable for upload to PyPI"
+	@echo "  clean        delete intermediate work product and start fresh"
+	@echo "  cleandocs    delete cached HTML documentation and start fresh"
+	@echo "  coverage     run nosetests with coverage"
+	@echo "  docs         build HTML documentation using Sphinx (incremental)"
+	@echo "  opendocs     open local HTML documentation in browser"
+	@echo "  test-upload  upload distribution to TestPyPI"
+	@echo "  upload       upload distribution tarball to PyPI"
+
+.PHONY: accept
 accept:
 	$(BEHAVE) --stop
 
+.PHONY: build
 build:
 	rm -rf dist
-	$(SETUP) bdist_wheel sdist
+	python -m build
+	twine check dist/*
 
+.PHONY: clean
 clean:
 	find . -type f -name \*.pyc -exec rm {} \;
 	find . -type f -name .DS_Store -exec rm {} \;
 	rm -rf dist .coverage
 
+.PHONY: cleandocs
 cleandocs:
 	$(MAKE) -C docs clean
 
+.PHONY: coverage
 coverage:
 	py.test --cov-report term-missing --cov=pptx --cov=tests
 
+.PHONY: docs
 docs:
 	$(MAKE) -C docs html
 
+.PHONY: opendocs
 opendocs:
 	open docs/.build/html/index.html
 
+.PHONY: test-upload
 test-upload: build
-	$(TWINE) upload --repository testpypi dist/*
+	twine upload --repository testpypi dist/*
 
+.PHONY: upload
 upload: clean build
-	$(TWINE) upload dist/*
+	twine upload dist/*

pyproject.toml

@@ -1,3 +1,45 @@
+[build-system]
+requires = ["setuptools>=61.0.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "python-pptx"
+authors = [{name = "Steve Canny", email = "stcanny@gmail.com"}]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Topic :: Office/Business :: Office Suites",
+    "Topic :: Software Development :: Libraries",
+]
+dependencies = [
+    "Pillow>=3.3.2",
+    "XlsxWriter>=0.5.7",
+    "lxml>=3.1.0",
+    "typing_extensions>=4.9.0",
+]
+description = "Create, read, and update PowerPoint 2007+ (.pptx) files."
+dynamic = ["version"]
+keywords = ["powerpoint", "ppt", "pptx", "openxml", "office"]
+license = { text = "MIT" }
+readme = "README.rst"
+requires-python = ">=3.8"
+
+[project.urls]
+Changelog = "https://github.com/scanny/python-pptx/blob/master/HISTORY.rst"
+Documentation = "https://python-pptx.readthedocs.io/en/latest/"
+Homepage = "https://github.com/scanny/python-pptx"
+Repository = "https://github.com/scanny/python-pptx"
+
 [tool.black]
 line-length = 100
 
@@ -98,3 +140,6 @@ ignore = [
 
 [tool.ruff.lint.isort]
 known-first-party = ["pptx"]
+
+[tool.setuptools.dynamic]
+version = {attr = "pptx.__version__"}

requirements-dev.txt

@@ -0,0 +1,5 @@
+-r requirements-test.txt
+build
+ruff
+setuptools>=61.0.0
+twine

requirements-docs.txt

@@ -0,0 +1,5 @@
+Sphinx==1.8.6
+Jinja2==2.11.3
+MarkupSafe==0.23
+alabaster<0.7.14
+-e .

requirements-test.txt

@@ -5,3 +5,4 @@ pytest>=2.5
 pytest-coverage
 pytest-xdist
 ruff
+tox

setup.cfg

@@ -7,8 +7,7 @@
 from __future__ import annotations
 
 import collections
-from collections.abc import Mapping
-from typing import IO, TYPE_CHECKING, DefaultDict, Iterator, Set, cast
+from typing import IO, TYPE_CHECKING, DefaultDict, Iterator, Mapping, Set, cast
 
 from pptx.opc.constants import RELATIONSHIP_TARGET_MODE as RTM
 from pptx.opc.constants import RELATIONSHIP_TYPE as RT
@@ -428,7 +427,7 @@ def part(self):
 
     def _rel_ref_count(self, rId: str) -> int:
         """Return int count of references in this part's XML to `rId`."""
-        return len([r for r in cast(list[str], self._element.xpath("//@r:id")) if r == rId])
+        return len([r for r in cast("list[str]", self._element.xpath("//@r:id")) if r == rId])
 
 
 class PartFactory:

setup.py

@@ -5,8 +5,7 @@
 import os
 import posixpath
 import zipfile
-from collections.abc import Container
-from typing import IO, TYPE_CHECKING, Any, Sequence
+from typing import IO, TYPE_CHECKING, Any, Container, Sequence
 
 from pptx.exc import PackageNotFoundError
 from pptx.opc.constants import CONTENT_TYPE as CT

src/pptx/opc/package.py

@@ -76,7 +76,7 @@ def _next_id(self) -> int:
         MIN_SLIDE_ID = 256
         MAX_SLIDE_ID = 2147483647
 
-        used_ids = [int(s) for s in cast(list[str], self.xpath("./p:sldId/@id"))]
+        used_ids = [int(s) for s in cast("list[str]", self.xpath("./p:sldId/@id"))]
         simple_next = max([MIN_SLIDE_ID - 1] + used_ids) + 1
         if simple_next <= MAX_SLIDE_ID:
             return simple_next