dockerfile-parser

---

Used to parse Dockerfile build specs to infer their dependencies.

Backend: pants.backend.docker

Config section: [dockerfile-parser]

Basic options

None

Advanced options

install_from_resolve

--dockerfile-parser-install-from-resolve=<str>
PANTS_DOCKERFILE_PARSER_INSTALL_FROM_RESOLVE

pants.toml

[dockerfile-parser]
install_from_resolve = <str>

default: None

If specified, install the tool using the lockfile for this named resolve.

This resolve must be defined in [python].resolves, as described in https://www.pantsbuild.org/v2.16/docs/python-third-party-dependencies#user-lockfiles.

The resolve's entire lockfile will be installed, unless specific requirements are listed via the requirements option, in which case only those requirements will be installed. This is useful if you don't want to invalidate the tool's outputs when the resolve incurs changes to unrelated requirements.

If unspecified, and the lockfile option is unset, the tool will be installed using the default lockfile shipped with Pants.

If unspecified, and the lockfile option is set, the tool will use the custom dockerfile-parser "tool lockfile" generated from the version and extra_requirements options. But note that this mechanism is deprecated.

interpreter_constraints

--dockerfile-parser-interpreter-constraints="['<str>', '<str>', ...]"
PANTS_DOCKERFILE_PARSER_INTERPRETER_CONSTRAINTS

pants.toml

[dockerfile-parser]
interpreter_constraints = [
    '<str>',
    '<str>',
    ...,
]

default:

[
  "CPython>=3.7,<4"
]

Python interpreter constraints for this tool.

requirements

--dockerfile-parser-requirements="['<str>', '<str>', ...]"
PANTS_DOCKERFILE_PARSER_REQUIREMENTS

pants.toml

[dockerfile-parser]
requirements = [
    '<str>',
    '<str>',
    ...,
]

default: []

If install_from_resolve is specified, install these requirements, at the versions provided by the specified resolve's lockfile.

Values can be pip-style requirements (e.g., tool or tool==1.2.3 or tool>=1.2.3), or addresses of python_requirement targets (or targets that generate or depend on python_requirement targets).

The lockfile will be validated against the requirements - if a lockfile doesn't provide the requirement (at a suitable version, if the requirement specifies version constraints) Pants will error.

If unspecified, install the entire lockfile.

Deprecated options

extra_requirements

--dockerfile-parser-extra-requirements="['<str>', '<str>', ...]"
PANTS_DOCKERFILE_PARSER_EXTRA_REQUIREMENTS

pants.toml

[dockerfile-parser]
extra_requirements = [
    '<str>',
    '<str>',
    ...,
]

default: []
Deprecated, will be removed in version: 2.18.0.dev1.
Custom tool versions are now installed from named resolves, as described at https://www.pantsbuild.org/v2.16/docs/python-lockfiles.

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.

lockfile

--dockerfile-parser-lockfile=<str>
PANTS_DOCKERFILE_PARSER_LOCKFILE

pants.toml

[dockerfile-parser]
lockfile = <str>

default: <default>
Deprecated, will be removed in version: 2.18.0.dev0.
Custom tool versions are now installed from named resolves, as described at https://www.pantsbuild.org/v2.16/docs/python-lockfiles.<br /><br />1. If you have an existing resolve that includes the requirements for this tool,<br /> you can set `[dockerfile-parser].install_from_resolve = "<resolve name>".<br /> This may be the case if the tool also provides a runtime library, and you want<br /> to specify the version in just one place.<br />2. If not, you can set up a new resolve as described at the link above.<br /><br />Either way, the resolve you choose should provide the requirements currently set by the `version` and `extra-requirements` options for this tool, which you can see by running `pants help-advanced dockerfile-parser`.

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].invalid_lockfile_behavior). See https://github.com/pantsbuild/pants/blob/release_2.16.1rc4/src/python/pants/backend/docker/subsystems/dockerfile.lock 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 and supply-chain security.

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

Alternatively, you can set this option to the path to a custom lockfile using pip's requirements.txt-style, ideally with --hash. Set [python].invalid_lockfile_behavior = 'ignore' so that Pants does not complain about missing lockfile headers.

version

--dockerfile-parser-version=<str>
PANTS_DOCKERFILE_PARSER_VERSION

pants.toml

[dockerfile-parser]
version = <str>

default: dockerfile==3.2.0
Deprecated, will be removed in version: 2.18.0.dev1.
Custom tool versions are now installed from named resolves, as described at https://www.pantsbuild.org/v2.16/docs/python-lockfiles.

Requirement string for the tool.

Related subsystems

None