buildifier

Buildifier is a tool for formatting BUILD files with a standard convention.

Pants supports running Buildifier on your Pants BUILD files for several reasons:

  • You might like the style that buildifier uses.
  • You might be incrementally adopting Pants from Bazel, and are already using buildifier.

Please note that there are differences from Bazel's BUILD files (which are Starlark) and Pants' BUILD files (which are Python), so buildifier may issue a syntax error. In practice, these errors should be rare. See https://bazel.build/rules/language#differences_with_python.

Backend: pants.backend.build_files.fmt.buildifier
Config section: [buildifier]

Basic options

skip

--[no-]buildifier-skip

PANTS_BUILDIFIER_SKIP

default: False

If true, don't use Buildifier when running ./pants fmt.


args

--buildifier-args="[<shell_str>, <shell_str>, ...]"

PANTS_BUILDIFIER_ARGS

default: []

Arguments to pass directly to Buildifier, e.g. --buildifier-args='-lint=fix'.


Advanced options

version

--buildifier-version=<str>

PANTS_BUILDIFIER_VERSION

default: 5.1.0

Use this version of Buildifier.


known_versions

--buildifier-known-versions="['<str>', '<str>', ...]"

PANTS_BUILDIFIER_KNOWN_VERSIONS

default:
[
  "5.1.0|macos_x86_64|c9378d9f4293fc38ec54a08fbc74e7a9d28914dae6891334401e59f38f6e65dc|7125968",
  "5.1.0|macos_arm64 |745feb5ea96cb6ff39a76b2821c57591fd70b528325562486d47b5d08900e2e4|7334498",
  "5.1.0|linux_x86_64|52bf6b102cb4f88464e197caac06d69793fa2b05f5ad50a7e7bf6fbd656648a3|7226100",
  "5.1.0|linux_arm64 |917d599dbb040e63ae7a7e1adb710d2057811902fdc9e35cce925ebfd966eeb8|7171938"
]

Known versions to verify downloads against.

Each element is a pipe-separated string of version|platform|sha256|length, where:

- `version` is the version string
- `platform` is one of [linux_arm64,linux_x86_64,macos_arm64,macos_x86_64],
- `sha256` is the 64-character hex representation of the expected sha256
digest of the download file, as emitted by `shasum -a 256`
- `length` is the expected length of the download file in bytes, as emitted by
`wc -c`

E.g., 3.1.2|macos_x86_64|6d0f18cd84b918c7b3edd0203e75569e0c7caecb1367bbbe409b44e28514f5be|42813.

Values are space-stripped, so pipes can be indented for readability if necessary.


use_unsupported_version

--buildifier-use-unsupported-version=<UnsupportedVersionUsage>

PANTS_BUILDIFIER_USE_UNSUPPORTED_VERSION

one of: error, warning
default: error

What action to take in case the requested version of Buildifier is not supported.

Supported Buildifier versions: unspecified


url_template

--buildifier-url-template=<str>

PANTS_BUILDIFIER_URL_TEMPLATE

default: https://github.com/bazelbuild/buildtools/releases/download/{version}/buildifier-{platform}

URL to download the tool, either as a single binary file or a compressed file (e.g. zip file). You can change this to point to your own hosted file, e.g. to work with proxies or for access via the filesystem through a file:$abspath URL (e.g. file:/this/is/absolute, possibly by templating the buildroot in a config file).

Use {version} to have the value from --version substituted, and {platform} to have a value from --url-platform-mapping substituted in, depending on the current platform. For example, https://github.com/.../protoc-{version}-{platform}.zip.


url_platform_mapping

--buildifier-url-platform-mapping="{'key1': val1, 'key2': val2, ...}"

PANTS_BUILDIFIER_URL_PLATFORM_MAPPING

default:
{
  "linux_arm64": "linux-arm64",
  "linux_x86_64": "linux-amd64",
  "macos_arm64": "darwin-arm64",
  "macos_x86_64": "darwin-amd64"
}

A dictionary mapping platforms to strings to be used when generating the URL to download the tool.

In --url-template, anytime the {platform} string is used, Pants will determine the current platform, and substitute {platform} with the respective value from your dictionary.

For example, if you define {"macos_x86_64": "apple-darwin", "linux_x86_64": "unknown-linux"}, and run Pants on Linux with an intel architecture, then {platform} will be substituted in the --url-template option with unknown-linux.


Deprecated options

None