docker

docker

Prepare Docker build variables to match the legacy bash script.

Functions

Name	Description
base_image_name	Get base image names from a Dockerfile.
prepare_docker_build_variables	Prepare Docker build variables and optionally write them to GITHUB_ENV.
tag_from_dockerfile	Extract the tag from the Dockerfile name (last extension).

base_image_name

docker.base_image_name(dockerfile)

Get base image names from a Dockerfile.

Matches the bash behavior: only lines starting with “FROM” are used and the literal “FROM” substring is removed everywhere on that line.

prepare_docker_build_variables

docker.prepare_docker_build_variables(
    dockerfile,
    suffix,
    dockerhub_account,
    github_env=None,
    now=None,
)

Prepare Docker build variables and optionally write them to GITHUB_ENV.

Parameters

Name	Type	Description	Default
dockerfile	str	Path to the Dockerfile.	required
suffix	str	Suffix for the image tag (e.g., “dev”, “main”).	required
dockerhub_account	str	Docker Hub account/namespace.	required
github_env	str	Path to the GitHub Actions env file.	None
now	datetime	Override current time for deterministic output.	None

Returns

Name	Type	Description
dict	Dict[str, str]	Mapping of variable names to their values.

tag_from_dockerfile

docker.tag_from_dockerfile(dockerfile)

Extract the tag from the Dockerfile name (last extension).

Mirrors bash ${bn_dockerfile##*.} behavior.