Modernize the packaging setup via PEP 621 and Hatch.

.flake8

@@ -0,0 +1,10 @@
+[flake8]
+ban-relative-imports = true
+inline-quotes = "
+exclude =
+    jsonschema/__init__.py
+    jsonschema/_reflect.py
+ignore =
+    B008,  # Barring function calls in default args. Ha, no.
+    B306,  # See https://github.com/PyCQA/flake8-bugbear/issues/131
+    W503,  # (flake8 default) old PEP8 boolean operator line breaks

.github/workflows/ci.yml

@@ -84,19 +84,18 @@ jobs:
             toxenv: py310-format_nongpl-build
           - name: "3.10"
             toxenv: py310-format_nongpl-tests
-          # Temporarily disabled due to pypa/setuptools#3274
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-noextra-build
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-noextra-tests
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-format-build
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-format-tests
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-format_nongpl-build
-          # - name: "3.11.0-alpha - 3.11.0"
-          #   toxenv: py311-format_nongpl-tests
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-noextra-build
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-noextra-tests
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-format-build
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-format-tests
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-format_nongpl-build
+          - name: "3.11.0-beta - 3.11.0"
+            toxenv: py311-format_nongpl-tests
           - name: "3.10"
             toxenv: docs-dirhtml
           - name: "3.10"
@@ -185,8 +184,6 @@ jobs:
       uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version.name }}
-    - name: Ensure we have new enough versions to respect python_version
-      run: python -m pip install -U pip setuptools
     - name: Install dependencies
       run: >
         sudo apt-get update &&
@@ -199,3 +196,39 @@ jobs:
       run: python -m pip install tox
     - name: Run tox
       run: python -m tox -e "${{ matrix.python-version.toxenv }}"
+
+  packaging:
+    needs: ci
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v3
+      with:
+        python-version: "3.10"
+    - name: Install dependencies
+      run: python -m pip install build
+    - name: Create packages
+      run: python -m build .
+    - uses: actions/upload-artifact@v3
+      with:
+        name: dist
+        path: dist
+    - name: Publish package
+      if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        user: __token__
+        password: ${{ secrets.pypi_password }}
+    - name: Create Release Notes
+      if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+      uses: actions/github-script@v6
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          await github.request(`POST /repos/${{ github.repository }}/releases`, {
+            tag_name: "${{ github.ref }}",
+            generate_release_notes: true
+          });

.github/workflows/coverage.yml

@@ -15,8 +15,6 @@ jobs:
       uses: actions/setup-python@v3
       with:
         python-version: "3.10"
-    - name: Ensure we have new enough versions to respect python_version
-      run: python -m pip install -U pip setuptools
     - name: Install tox
       run: python -m pip install tox
     - name: Collect & Upload Coverage

CONTRIBUTING.rst

@@ -0,0 +1,60 @@
+============================
+Contributing to `jsonschema`
+============================
+
+Found a bug?
+------------
+
+If you suspect you may have found a security-related vulnerability, please follow the instructions in `the security policy <https://github.com/python-jsonschema/jsonschema/blob/main/.github/SECURITY.md>`_.
+
+Otherwise, it is extremely helpful if you first search to see whether your bug has been `previously reported on the Issues tab <https://github.com/python-jsonschema/jsonschema/issues?q=is%3Aissue+is%3Aopen+label%3ABug>`_.
+
+If it doesn't appear to be a known issue, please `file a new one <https://github.com/python-jsonschema/jsonschema/issues/new>`_, and include a **title and clear description**, along with as much relevant information as possible.
+Including a *minimal*, *self-sufficient* bit of code (often an instance and schema) is the fastest way to get attention, along with a description of the behavior you expect, and if you're able, a link to where in the specification contains the behavior you're noticing is incorrect.
+
+Pull requests to fix your issue are of course very welcome.
+
+
+Fixing a Bug?
+-------------
+
+Please open a new GitHub pull request with the change, along with new tests.
+
+Ensure the PR description clearly describes the problem and solution. Include the relevant issue number if applicable.
+
+Continuous integration via GitHub actions should run to indicate whether your change passes both the test suite as well as linters.
+Please ensure it passes, or indicate in a comment if you believe it fails spuriously.
+
+
+Adding New Functionality?
+-------------------------
+
+Please discuss any larger changes ahead of time for the sake of your own time!
+
+Improvements are very welcome, but large pull requests, disruptive ones, or backwards incompatible ones, can lead to long back and forth discussions.
+
+You're welcome to suggest a change in an issue and thereby get some initial feedback before embarking on an effort that may not get merged.
+
+
+Improving the Documentation?
+----------------------------
+
+Writing good documentation is challenging both to prioritize and to do well.
+
+Any help you may have would be great, especially if you're a beginner who's struggled to understand a part of the library.
+
+Documentation is written in `Sphinx-flavored reStructuredText <https://www.sphinx-doc.org>`_, so you'll want to familiarize yourself a bit with Sphinx.
+
+Feel free to file issues or pull requests.
+
+
+Have a Question?
+----------------
+
+Please do not use the issue tracker for questions, it's reserved for things believed to be bugs, or new functionality.
+
+There is a `discussions tab <https://github.com/python-jsonschema/jsonschema/discussions>`_ where general questions can be asked.
+
+Answers on it are best-effort.
+
+Any help you can offer to answer others' questions is of course very welcome as well.

README.rst

@@ -125,8 +125,9 @@ schemas can be found there.
 Otherwise, asking questions on Stack Overflow is another means of
 getting help if you're stuck.
 
-Contributing
-------------
+
+About
+-----
 
 I'm Julian Berman.
 

docs/conf.py

@@ -239,6 +239,7 @@ def entire_domain(host):
 
 
 linkcheck_ignore = [
+    entire_domain("img.shields.io"),
     "https://github.com/python-jsonschema/jsonschema/actions",
     "https://github.com/python-jsonschema/jsonschema/workflows/CI/badge.svg",
 ]

docs/validate.rst

@@ -205,7 +205,7 @@ to validate. Their names can be viewed by inspecting the
 `FormatChecker.checkers` attribute. Certain checkers will only be
 available if an appropriate package is available for use. The easiest way to
 ensure you have what is needed is to install ``jsonschema`` using the
-``format`` or ``format_nongpl`` setuptools extra -- i.e.
+``format`` or ``format_nongpl`` collection of optional dependencies -- e.g.
 
 .. code-block:: sh
 

pyproject.toml

@@ -1,16 +1,97 @@
 [build-system]
-requires = [
-    # The minimum setuptools version is specific to the PEP 517 backend,
-    # and may be stricter than the version required in `setup.py`
-    "setuptools>=40.6.0",
-    "setuptools_scm[toml]>=3.4",
-    "wheel",
+requires = ["hatchling", "hatch-vcs"]
+build-backend = "hatchling.build"
+
+[tool.hatch.version]
+source = "vcs"
+
+[project]
+name = "jsonschema"
+description = "An implementation of JSON Schema validation for Python"
+readme = "README.rst"
+requires-python = ">=3.7"
+license = {text = "MIT"}
+keywords = ["validation", "data validation", "jsonschema", "json"]
+authors = [
+  {email = "Julian+jsonschema@GrayVines.com"},
+  {name = "Julian Berman"},
+]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "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 :: Implementation :: CPython",
+  "Programming Language :: Python :: Implementation :: PyPy",
+]
+dynamic = ["version"]
+
+dependencies = [
+  "attrs>=17.4.0",
+  "pyrsistent>=0.14.0,!=0.17.0,!=0.17.1,!=0.17.2",
+
+  "importlib_metadata;python_version<'3.8'",
+  "typing_extensions;python_version<'3.8'",
+  "importlib_resources>=1.4.0;python_version<'3.9'",
+]
+
+[project.optional-dependencies]
+format = [
+  "fqdn",
+  "idna",
+  "isoduration",
+  "jsonpointer>1.13",
+  "rfc3339-validator",
+  "rfc3987",
+  "uri_template",
+  "webcolors>=1.11",
+]
+format_nongpl = [
+  "fqdn",
+  "idna",
+  "isoduration",
+  "jsonpointer>1.13",
+  "rfc3339-validator",
+  "rfc3986-validator>0.1.0",
+  "uri_template",
+  "webcolors>=1.11",
 ]
-build-backend = "setuptools.build_meta"
+
+[project.scripts]
+jsonschema = "jsonschema.cli:main"
+
+[project.urls]
+homepage = "https://github.com/python-jsonschema/jsonschema"
+documentation = "https://python-jsonschema.readthedocs.io/"
+issues = "https://github.com/python-jsonschema/jsonschema/issues/"
+funding = "https://github.com/sponsors/Julian"
+tidelift = "https://tidelift.com/subscription/pkg/pypi-jsonschema?utm_source=pypi-jsonschema&utm_medium=referral&utm_campaign=pypi-link"
+changelog = "https://github.com/python-jsonschema/jsonschema/blob/main/CHANGELOG.rst"
+source = "https://github.com/python-jsonschema/jsonschema"
 
 [tool.isort]
 from_first = true
 include_trailing_comma = true
 multi_line_output = 3
 
-[tool.setuptools_scm]
+[tool.mypy]
+ignore_missing_imports = true
+
+[tool.pydocstyle]
+match = "(?!(test_|_|compat|cli)).*\\.py"  # see PyCQA/pydocstyle#323
+add-select = [
+  "D410", # Trailing whitespace plz
+]
+add-ignore = [
+  "D107",  # Hah, no
+  "D200",  # 1-line docstrings don't need to be on one line
+  "D202",  # One line is fine.
+  "D412",  # Trailing whitespace plz
+  "D413",  # No trailing whitespace plz
+]