Add command for migrating config to pyproject.toml.

jaraco/develop/migrate-config.py

@@ -0,0 +1,65 @@
+import pathlib
+import re
+import subprocess
+
+import autocommand
+from ini2toml.api import Translator
+
+
+def split_build_system(pyproject):
+    """
+    Return the first section up to the second section, and the rest.
+    """
+    # put the toml ahead of the second section
+    section_starts = re.finditer(r'^\[', pyproject, re.MULTILINE)
+    _, second = next(section_starts), next(section_starts)
+    return pyproject[: second.start()], pyproject[second.start() :]
+
+
+def tweak(config):
+    """
+    Tweak the syntax some for easier merging with skeleton.
+    """
+    config = re.sub(
+        r'^(authors|maintainers) = \[(.*?)\]',
+        r'\1 = [\n\t\2,\n]',
+        config,
+        flags=re.MULTILINE | re.DOTALL,
+    )
+    config = re.sub(
+        r'{(name = .*?")}', r'{ \1 }', config, flags=re.MULTILINE | re.DOTALL
+    )
+    config = re.sub(r'^    ', '\t', config, flags=re.MULTILINE)
+    homepage = re.search('Homepage = ".*"', config).group(0)
+    config = re.sub(r'^urls =.*?\n', '', config, flags=re.MULTILINE)
+    homepage_scn = f'[project.urls]\n{homepage}\n\n'
+    config = re.sub(r'(\[project\.scripts\])', homepage_scn + r'\1', config)
+    config = re.sub(
+        r'(\n\[tool\.setuptools\]\ninclude-package-data = true\n)',
+        '',
+        config,
+        flags=re.MULTILINE,
+    )
+    config = re.sub(r'^\t# local', '\n\t# local', config, flags=re.MULTILINE)
+    return config
+
+
+def bump_setuptools(build_system):
+    return build_system.replace('setuptool>=56', 'setuptools>=61.2')
+
+
+@autocommand.autocommand(__name__)
+def run():
+    pyproject = pathlib.Path('pyproject.toml')
+    config = Translator().translate(pathlib.Path('setup.cfg').read_text(), 'setup.cfg')
+    config_bs, config_rest = split_build_system(config)
+    existing_bs, existing_rest = split_build_system(pyproject.read_text())
+    pyproject.write_text(
+        bump_setuptools(existing_bs) + tweak(config_rest) + '\n' + existing_rest
+    )
+    subprocess.check_call('git rm setup.cfg'.split())
+    message = (
+        "Migrated config to pyproject.toml using jaraco.develop.migrate-config "
+        "and ini2toml."
+    )
+    subprocess.check_call(['git', 'commit', '-a', '-m', message])

newsfragments/+8eaad5eb.feature.rst

@@ -0,0 +1 @@
+Add command for migrating config to pyproject.toml.

setup.cfg

@@ -30,6 +30,7 @@ install_requires =
 	subprocess-tee
 	requests-file
 	requests
+	ini2toml[full]
 
 [options.extras_require]
 testing =