Skip to main content
Version: 2.7 (deprecated)

black

The Black Python code formatter (https://black.readthedocs.io/).

Backend: ``

Config section: [black]

Basic options​

args​

--black-args="[<shell_str>, <shell_str>, ...]"
PANTS_BLACK_ARGS
pants.toml
[black]
args = [
    <shell_str>,
    <shell_str>,
    ...,
]
default: []

Arguments to pass directly to Black, e.g. --black-args="--target-version=py37 --quiet"

skip​

--[no-]black-skip
PANTS_BLACK_SKIP
pants.toml
[black]
skip = <bool>
default: False

Don't use Black when running /home/josh/work/scie-pants/dist/pants fmt and /home/josh/work/scie-pants/dist/pants lint

Advanced options​

config​

--black-config=<file_option>
PANTS_BLACK_CONFIG
pants.toml
[black]
config = <file_option>
default: None

Path to a TOML config file understood by Black (https://github.com/psf/black#configuration-format).

Setting this option will disable [black].config_discovery. Use this option if the config is located in a non-standard location.

config_discovery​

--[no-]black-config-discovery
PANTS_BLACK_CONFIG_DISCOVERY
pants.toml
[black]
config_discovery = <bool>
default: True

If true, Pants will include any relevant pyproject.toml config files during runs.

Use [black].config instead if your config is in a non-standard location.

console_script​

--black-console-script=<str>
PANTS_BLACK_CONSOLE_SCRIPT
pants.toml
[black]
console_script = <str>
default: black

The console script for the tool. Using this option is generally preferable to (and mutually exclusive with) specifying an --entry-point since console script names have a higher expectation of staying stable across releases of the tool. Usually, you will not want to change this from the default.

entry_point​

--black-entry-point=<str>
PANTS_BLACK_ENTRY_POINT
pants.toml
[black]
entry_point = <str>
default: None

The entry point for the tool. Generally you only want to use this option if the tool does not offer a --console-script (which this option is mutually exclusive with). Usually, you will not want to change this from the default.

extra_requirements​

--black-extra-requirements="['<str>', '<str>', ...]"
PANTS_BLACK_EXTRA_REQUIREMENTS
pants.toml
[black]
extra_requirements = [
    '<str>',
    '<str>',
    ...,
]
default: []

Any additional requirement strings to use with the tool. This is useful if the tool allows you to install plugins or if you need to constrain a dependency to a certain version.

interpreter_constraints​

--black-interpreter-constraints="['<str>', '<str>', ...]"
PANTS_BLACK_INTERPRETER_CONSTRAINTS
pants.toml
[black]
interpreter_constraints = [
    '<str>',
    '<str>',
    ...,
]
default: 
[
  "CPython>=3.6.2"
]

Python interpreter constraints for this tool.

lockfile​

--black-lockfile=<str>
PANTS_BLACK_LOCKFILE
pants.toml
[black]
lockfile = <str>
default: <default>

Path to a lockfile used for installing the tool.

Set to the string <default> to use a lockfile provided by Pants, so long as you have not changed the --version and --extra-requirements options, and the tool's interpreter constraints are compatible with the default. Pants will error or warn if the lockfile is not compatible (controlled by [python-setup].invalid_lockfile_behavior). See https://github.com/pantsbuild/pants/blob/release_2.7.2/src/python/pants/backend/python/lint/black/lockfile.txt for the default lockfile contents.

Set to the string <none> to opt out of using a lockfile. We do not recommend this, though, as lockfiles are essential for reproducible builds.

To use a custom lockfile, set this option to a file path relative to the build root, then run ./pants generate-lockfiles --resolve=black.

Lockfile generation currently does not wire up the [python-repos] options. If lockfile generation fails, you can manually generate a lockfile, such as by using pip-compile or pip freeze. Set this option to the path to your manually generated lockfile. When manually maintaining lockfiles, set [python-setup].invalid_lockfile_behavior = 'ignore'.

version​

--black-version=<str>
PANTS_BLACK_VERSION
pants.toml
[black]
version = <str>
default: black==21.5b2

Requirement string for the tool.

Deprecated options​

None

None