pyproject.toml

[build-system]
requires = ["maturin>=1.9.3,<2.0"]
build-backend = "maturin"

[project]
name = "ruff"
version = "0.16.8"
description = "An extremely fast Python linter and code formatter, written in Rust."
authors = [{ name = "Astral Software Inc.", email = "hey@astral.sh" }]
readme = "README.md"
requires-python = ">=3.7"
license = "MIT"
license-files = ["LICENSE"]
keywords = [
    "automation",
    "flake8",
    "pycodestyle",
    "pyflakes",
    "pylint",
    "clippy",
]
classifiers = [
    "Development Status :: 5 - Production/Stable",
    "Environment :: Console",
    "Intended Audience :: Developers",
    "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 :: 3.12",
    "Programming Language :: Python :: 3.13",
    "Programming Language :: Python :: 3.14",
    "Programming Language :: Python :: 3 :: Only",
    "Programming Language :: Rust",
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
]

[project.urls]
Repository = "https://github.com/astral-sh/ruff"
Documentation = "https://docs.astral.sh/ruff/"
Changelog = "https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md"

[tool.maturin]
bindings = "bin"
manifest-path = "crates/ruff/Cargo.toml"
module-name = "ruff"
python-source = "python"
strip = true
exclude = [
    "crates/ruff_linter/resources/test/fixtures/**/*",
    "crates/ruff_linter/src/rules/*/snapshots/**/*"
]

[dependency-groups]
dev = [
    "astral-dev-toolchain-cargo-codspeed>=5.0.1",
    "astral-dev-toolchain-cargo-deny>=0.20.2",
    "astral-dev-toolchain-cargo-fuzz>=0.13.2",
    "astral-dev-toolchain-cargo-insta>=1.48.0",
    "astral-dev-toolchain-cargo-nextest>=0.9.143",
    "astral-dev-toolchain-cargo-shear>=1.13.4",
    "astral-dev-toolchain-hyperfine>=1.20.0",
    "prek==0.4.14",
]
release = [
    "rooster==0.1.1",
]
docs = [
    "mkdocs>=1.6.1",
    "mkdocs-github-admonitions-plugin>=0.1.1",
    "mkdocs-llmstxt>=0.2.0",
    "mkdocs-material>=9.7.7",
    "mkdocs-redirects>=1.2.3",
    "pyyaml>=6.0.3",
]
# The compatibility tests use the Ruff binary built from this checkout.
ruff-lsp-test = [
    "lsprotocol>=2023.0.0",
    "packaging>=23.1",
    # ruff-lsp uses the pygls 1.x server API.
    "pygls>=1.1.0,<2",
    "pytest>=9.0.3,<10",
    "pytest-asyncio>=0.21.2",
    "python-lsp-jsonrpc>=1.0.0",
    "typing-extensions>=4.7.1",
]
ty-ecosystem = [
    "ecosystem-analyzer",
]
typeshed-docstrings = [
    "docstring-adder",
]
typeshed-formatting = [
    "black",
]

[tool.uv]
no-build = true
# CI installs the local ecosystem runner and tools pinned to Git revisions.
no-binary-package = [
    "black",
    "docstring-adder",
    "ecosystem-analyzer",
    "mypy-primer",
    "ruff-ecosystem",
    "typeshed-client",
]
# Pin the isolated build environment for source-build exceptions.
build-constraint-dependencies = [
    "flit-core==4.0.2",
    "hatch-fancy-pypi-readme==25.1.0",
    "hatch-vcs==0.5.0",
    "hatchling==1.32.0",
    "packaging==26.3",
    "pathspec==1.1.1",
    "pluggy==1.6.0",
    "setuptools==84.0.0",
    "setuptools-scm==10.2.1",
    "tomli==2.4.1; python_version < '3.11'",
    "tomlkit==0.15.1",
    "trove-classifiers==2026.6.1.19",
    "typing-extensions==4.16.0; python_version < '3.11'",
    "uv-build==0.12.3",
    "vcs-versioning==2.2.4",
    "wheel==0.47.0",
]
exclude-newer = "P7D"

[tool.uv.exclude-newer-package]
astral-dev-toolchain-cargo-deny = "2026-09-15T19:10:00Z"
astral-dev-toolchain-hyperfine = "2026-08-27T00:00:00Z"
astral-dev-toolchain-cargo-shear = "2026-08-27T00:00:00Z"
astral-dev-toolchain-cargo-codspeed = "2026-08-27T00:00:00Z"
astral-dev-toolchain-cargo-nextest = "2026-08-27T00:00:00Z"
astral-dev-toolchain-cargo-insta = "2026-08-27T00:00:00Z"
astral-dev-toolchain-cargo-fuzz = "2026-09-01T00:00:00Z"

[tool.uv.dependency-groups]
dev = { requires-python = ">=3.12" }
release = { requires-python = ">=3.12" }
docs = { requires-python = ">=3.12" }
ruff-lsp-test = { requires-python = ">=3.12" }
ty-ecosystem = { requires-python = ">=3.13" }
typeshed-docstrings = { requires-python = ">=3.10" }
typeshed-formatting = { requires-python = ">=3.10" }

[tool.uv.sources]
docstring-adder = { git = "https://github.com/astral-sh/docstring-adder.git" }
# Switch to a released version once it includes
# https://github.com/psf/black/commit/f665703258bfa1916f8a6c1cbab0bc384b90cbac.
black = { git = "https://github.com/psf/black.git" }
# Keep scripts/setup_primer_project.py and its lockfile synchronized with
# ecosystem-analyzer's mypy-primer pin when updating its locked revision.
ecosystem-analyzer = { git = "https://github.com/astral-sh/ecosystem-analyzer" }

[tool.ruff]
target-version = "py38"
extend-exclude = [
    "crates/ty_vendored/vendor/",
    "crates/ruff/resources/",
    "crates/ruff_linter/resources/",
    "crates/ruff_python_formatter/resources/",
    "crates/ruff_python_parser/resources/",
    "crates/ruff_python_semantic/resources/"
]

[tool.ruff.lint]
preview = true
select = [
    # Categories
    "correctness",
    "suspicious",
    "complexity",
    "performance",
    "style",

    # E # pycodestyle (error)
    "ambiguous-class-name",
    "ambiguous-function-name",
    "ambiguous-variable-name",
    "lambda-assignment",
    "module-import-not-at-top-of-file",
    "multiple-imports-on-one-line",
    "multiple-leading-hashes-for-block-comment",
    "no-indented-block",
    "none-comparison",
    "not-in-test",
    "not-is-test",
    "true-false-comparison",
    "type-comparison",
    "unexpected-indentation",

    # F # pyflakes
    "forward-annotation-syntax-error",
    "undefined-local-with-import-star",
    "undefined-local-with-import-star-usage",

    # B # bugbear
    "batched-without-explicit-strict",
    "class-as-data-structure",
    "map-without-explicit-strict",
    "no-explicit-stacklevel",
    "raise-without-from-inside-except",
    "re-sub-positional-args",
    "unused-loop-control-variable",
    "zip-without-explicit-strict",

    # C4 # flake8-comprehensions
    "unnecessary-comprehension",

    # SIM # flake8-simplify
    "compare-with-tuple",
    "dict-get-with-none-default",
    "if-else-block-instead-of-dict-lookup",
    "if-else-block-instead-of-if-exp",
    "if-expr-with-twisted-arms",
    "suppressible-exception",
    "uncapitalized-environment-variables",
    "yoda-conditions",

    # I # isort
    "missing-required-import",

    # UP # pyupgrade
    "convert-typed-dict-functional-to-class",
    "redundant-open-modes",

    # PGH # pygrep-hooks
    "blanket-noqa",
    "blanket-type-ignore",

    # PYI # flake8-pyi
    "argument-default-in-stub",
    "collections-named-tuple",
    "docstring-in-stub",
    "numeric-literal-too-long",
    "redundant-literal-union",
    "string-or-bytes-too-long",
    "typed-argument-default-in-stub",
    "unsupported-method-call-on-all",

    # RUF
    "ambiguous-unicode-character-comment",
    "ambiguous-unicode-character-docstring",
    "ambiguous-unicode-character-string",
    "asyncio-dangling-task",
    "collection-literal-concatenation",
    "incorrectly-parenthesized-tuple-in-subscript",
    "non-empty-init-module",
    "noqa-comments",
    "parenthesize-chained-operators",
    "rule-codes-in-selectors",
    "unnecessary-assign-before-yield",
    "unraw-re-pattern",
    "unused-async",
    "used-dummy-variable",

    # S
    "subprocess-popen-with-shell-equals-true",
]

ignore = [
    # only relevant if you run a script with `python -0`,
    # which seems unlikely for any of the scripts in this repo
    "assert-false",
    # Leave it to the formatter to split long lines and
    # the judgement of all of us.
    "line-too-long",
    # This is often more readable in our scripts.
    "repeated-append",
]

[tool.ruff.lint.isort]
required-imports = ["from __future__ import annotations"]
combine-as-imports = true

[tool.ruff.per-file-target-version]
"crates/ty_python_semantic/mdtest.py" = "py310"
"crates/ty_vendored/ty_extensions/*.pyi" = "py312"
"scripts/*.py" = "py312"

[tool.black]
force-exclude = '''
/(
  | crates/ty_vendored/vendor
  | crates/ruff_linter/resources
  | crates/ruff_python_formatter/resources
  | crates/ruff_python_parser/resources
)/
'''

[tool.rooster]
major_labels = []  # Ruff never uses the major version number
minor_labels = ["breaking"]   # Bump the minor version on breaking changes

ignore_labels = ["internal", "ci", "testing", "ty"]

version_files = [
    "README.md",
    "pyproject.toml",
    # Might become unneeded once Markdown formatting is stabilized.
    "docs/formatter.md",
    "docs/installation.md",
    "docs/integrations.md",
    "docs/tutorial.md",
    "crates/ruff/Cargo.toml",
    "crates/ruff_linter/Cargo.toml",
    # Note that the value being replaced here needs to be kept in sync with the
    # validation regex in the `violation_metadata` macro.
    { target = "crates/ruff_linter/src/rules/**/*.rs", replace = "NEXT_RUFF_VERSION" },
    "crates/ruff_wasm/Cargo.toml",
    "scripts/benchmarks/pyproject.toml",
]

[tool.rooster.section-labels]
"Breaking changes" = ["breaking"]
"Preview features" = ["preview"]
"Bug fixes" = ["bug"]
"Rule changes" = [
    "diagnostics",
    "docstrings",
    "rule",
    "fixes",
    "isort",
]
"Performance" = ["performance"]
"Formatter" = ["formatter"]
"Server" = ["server"]
"CLI" = ["cli"]
"Configuration" = ["configuration"]
"Documentation" = ["documentation"]
"Other changes" = ["__unknown__"]