Module dockerfile 

Dockerfile parsing and representation

This module provides types and functions for parsing Dockerfiles into a structured representation that can be used for analysis, validation, and conversion to buildah commands.

Structs

AddInstruction

ADD instruction (similar to COPY but with URL and archive support)

ArgInstruction

ARG instruction

CopyInstruction

COPY instruction

Dockerfile

A parsed Dockerfile

EnvInstruction

ENV instruction

ExposeInstruction

EXPOSE instruction

RunInstruction

RUN instruction with optional BuildKit features

Stage

A single stage in a multi-stage Dockerfile

VariableContext

Builder for tracking variable state during Dockerfile processing

Enums

CacheSharing

Cache sharing mode for RUN –mount=type=cache

DockerfileFromTarget

A Dockerfile FROM target.

ExposeProtocol

Protocol for EXPOSE instruction

HealthcheckInstruction

HEALTHCHECK instruction

Instruction

A single Dockerfile instruction

RunMount

Mount types for RUN –mount

RunNetwork

Network mode for RUN –network

RunSecurity

Security mode for RUN –security

ShellOrExec

Represents a command that can be in shell form or exec form

Functions

expand_dockerfile

Expand Docker build-time variables across an entire Dockerfile IR.

expand_variables

Expand variables in a string using the provided ARG and ENV maps.

expand_variables_in_list

Expands variables in a list of strings

forward_build_arg_env

Forward declared-but-unset build-args from the process environment.

merge_default_cache_mounts

Merge the build’s default cache mounts into every RUN instruction of a Dockerfile IR, in place.

render_dockerfile

Serialize a (presumably already variable-substituted) Dockerfile IR back to canonical Dockerfile text.