Extract common Python

Signed-off-by: Bernát Gábor <[email protected]>

.gitignore

@@ -1,5 +1,5 @@
-/common/target
-/target
-/pyproject-fmt/.tox
-/pyproject-fmt/dist
-/dist
+.tox
+target
+dist
+__pycache__
+_lib.abi3.*

common/README.md

@@ -1,5 +1,5 @@
-# toml-fmt common
+# toml-fmt-common
 
-Contains code common to all formatters.
+Contains Rust code common to all formatters under the `toml-fmt` umbrella.
 
 [![Test common](https://github.com/tox-dev/toml-fmt/actions/workflows/common.yaml/badge.svg)](https://github.com/tox-dev/toml-fmt/actions/workflows/common.yaml)

py-common/LICENSE.txt

@@ -0,0 +1,18 @@
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

py-common/README.md

@@ -0,0 +1,5 @@
+# toml-fmt-common
+
+Contains Python code common to all formatters under the `toml-fmt` umbrella.
+
+[![Test common](https://github.com/tox-dev/toml-fmt/actions/workflows/py-common.yaml/badge.svg)](https://github.com/tox-dev/toml-fmt/actions/workflows/py-common.yaml)

py-common/pyproject.toml

@@ -0,0 +1,97 @@
+[build-system]
+build-backend = "hatchling.build"
+requires = [
+  "hatchling>=1.25",
+]
+
+[project]
+name = "toml-fmt-common"
+version = "1.0.0"
+description = "Common logic to the TOML formatter."
+readme = "README.md"
+license = "MIT"
+maintainers = [
+  { name = "Bernát Gábor", email = "[email protected]" },
+]
+requires-python = ">=3.9"
+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 :: Only",
+  "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 :: Internet",
+  "Topic :: Software Development :: Libraries",
+  "Topic :: System",
+]
+dependencies = [
+  "tomli>=2.0.2; python_version<'3.11'",
+]
+urls."Bug Tracker" = "https://github.com/tox-dev/toml-fmt/issues"
+urls."Changelog" = "https://github.com/tox-dev/toml-fmt/blob/main/py-common/CHANGELOG.md"
+urls.Documentation = "https://github.com/tox-dev/toml-fmt/"
+urls."Source Code" = "https://github.com/tox-dev/toml-fmt"
+
+[tool.ruff]
+extend = "../pyproject.toml"
+lint.isort = { known-first-party = [
+  "toml_fmt_common",
+  "tests",
+], required-imports = [
+  "from __future__ import annotations",
+] }
+
+[tool.pyproject-fmt]
+max_supported_python = "3.13"
+
+[tool.coverage]
+html.show_contexts = true
+html.skip_covered = false
+paths.source = [
+  "src",
+  ".tox/*/lib/*/site-packages",
+  ".tox\\*\\Lib\\site-packages",
+  "**/src",
+  "**\\src",
+]
+paths.other = [
+  ".",
+  "*/toml_fmt_common",
+  "*\\toml_fmt_common",
+]
+report.fail_under = 100
+run.parallel = true
+run.plugins = [
+  "covdefaults",
+]
+
+[tool.mypy]
+show_error_codes = true
+strict = true
+
+[dependency-groups]
+dev = [
+  { include-group = "test" },
+  { include-group = "type" },
+]
+pkg-meta = [
+  "check-wheel-contents>=0.6",
+  "twine>=5.1.1",
+  "uv>=0.4.17",
+]
+test = [
+  "covdefaults>=2.3",
+  "pytest>=8.3.2",
+  "pytest-cov>=5",
+  "pytest-mock>=3.14",
+]
+type = [
+  "mypy==1.11.2",
+  { include-group = "test" },
+]