Replace "setup.py" with "pyproject.toml" for builds (#1140)

See PEP 517 and PEP 631.

pyproject.toml

@@ -1,8 +1,89 @@
+[build-system]
+build-backend = "flit_core.buildapi"
+requires = ["flit_core>=3,<4"]
+
+[project]
+authors = [
+  {name = "Delgan", email = "delgan.py@gmail.com"}
+]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Topic :: System :: Logging",
+  "Intended Audience :: Developers",
+  "Natural Language :: English",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.5",
+  "Programming Language :: Python :: 3.6",
+  "Programming Language :: Python :: 3.7",
+  "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",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3 :: Only",
+  "Programming Language :: Python :: Implementation :: PyPy",
+  "Programming Language :: Python :: Implementation :: CPython"
+]
+dependencies = [
+  "colorama>=0.3.4 ; sys_platform=='win32'",
+  "aiocontextvars>=0.2.0 ; python_version<'3.7'",
+  "win32-setctime>=1.0.0 ; sys_platform=='win32'"
+]
+description = "Python logging made (stupidly) simple"
+dynamic = ['version']
+keywords = ["loguru", "logging", "logger", "log"]
+license = {text = "MIT"}
+name = "loguru"
+readme = 'README.rst'
+requires-python = ">=3.5,<4.0"
+
+[project.optional-dependencies]
+dev = [
+  # Setup.
+  "pre-commit==3.7.0 ; python_version>='3.9'",
+  "tox==3.27.1 ; python_version<'3.8'",
+  "tox==4.15.0 ; python_version>='3.8'",
+  # Testing framework.
+  "pytest==6.1.2 ; python_version<'3.8'",
+  "pytest==8.2.1 ; python_version>='3.8'",
+  "pytest-cov==2.12.1 ; python_version<'3.8'",
+  "pytest-cov==5.0.0 ; python_version>='3.8'",
+  "pytest-mypy-plugins==1.9.3 ; python_version>='3.6' and python_version<'3.8'",
+  "pytest-mypy-plugins==3.1.0 ; python_version>='3.8'",
+  # Testing utils.
+  "colorama==0.4.5 ; python_version<'3.8'",
+  "colorama==0.4.6 ; python_version>='3.8'",
+  "freezegun==1.1.0 ; python_version<'3.8'",
+  "freezegun==1.5.0 ; python_version>='3.8'",
+  "exceptiongroup==1.1.3 ; python_version>='3.7' and python_version<'3.11'",
+  # Type checking.
+  "mypy==v0.910 ; python_version<'3.6'",
+  "mypy==v0.971 ; python_version>='3.6' and python_version<'3.7'",
+  "mypy==v1.4.1 ; python_version>='3.7' and python_version<'3.8'",
+  "mypy==v1.10.0 ; python_version>='3.8'",
+  # Docs.
+  "Sphinx==7.3.7 ; python_version>='3.9'",
+  "sphinx-autobuild==2024.4.16 ; python_version>='3.9'",
+  "sphinx-rtd-theme==2.0.0 ; python_version>='3.9'"
+]
+
+[project.urls]
+Changelog = "https://github.com/Delgan/loguru/blob/master/CHANGELOG.rst"
+Documentation = "https://loguru.readthedocs.io/en/stable/index.html"
+Homepage = "https://github.com/Delgan/loguru"
+
 [tool.black]
 force-exclude = "tests/exceptions/source/modern/*"
 line-length = 100
 target-version = ["py35"]
 
+[tool.flit.module]
+name = "loguru"
+
 [tool.mypy]
 strict = true
 

tox.ini

@@ -1,5 +1,6 @@
 [tox]
 envlist = lint, tests, docs
+isolated_build = True
 
 [testenv]
 setenv = PYTHONPATH = {toxinidir}