feat: Migrate to pyproject.toml (#52)

* feat: Migrate to pyproject.toml

* chore: Update license identifier

Author: kesara

.github/workflows/pypi-publish.yml

@@ -82,8 +82,7 @@ jobs:
       run: |
         echo "Using version $PKG_VERSION_STRICT"
         sed -i -r -e "s/^__version__ = '.*'$/__version__ = '$PKG_VERSION_STRICT'/" rfc2html.py
-        python ./setup.py setopt --command=metadata --option=version --set-value=$PKG_VERSION_STRICT
-        python ./setup.py sdist --dist-dir dist
+        python3 -m build
 
     - name: Store the distribution packages
       uses: actions/upload-artifact@v4

pyproject.toml

@@ -0,0 +1,49 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "rfc2html"
+dynamic = ["version"]
+authors = [
+  {name = "IETF Tools", email = "[email protected]"},
+]
+description = "Convert text-format RFCs and Internet-Drafts to html"
+keywords = ["svg", "validation", "rfc", "internet-draft", "html"]
+readme = "README.md"
+license = "BSD-3-Clause"
+license-files = ["LICENSE"]
+requires-python = ">=2.7"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "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",
+    "Topic :: Text Processing",
+    "Topic :: Text Processing :: Markup :: XML",
+]
+
+[project.urls]
+homepage = "https://github.com/ietf-tools/rfc2html"
+source = "https://github.com/ietf-tools/rfc2html"
+issues = "https://github.com/ietf-tools/rfc2html/issues"
+changelog = "https://github.com/ietf-tools/rfc2html/blob/main/CHANGELOG.md"
+releasenotes = "https://github.com/ietf-tools/rfc2html/releases"
+
+[project.optional-dependencies]
+tests = [
+    "coverage",
+	"flake8",
+    "tox",
+]
+
+[project.scripts]
+rfc2html = "rfc2html:main"
+
+[tool.setuptools]
+py-modules = ["rfc2html"]
+
+[tool.setuptools.dynamic]
+version = {attr = "rfc2html.__version__"}