dockerfile_parse_quickstart_access_modify_instructions_envs.py

1from dockerfile_parse import DockerfileParser
2
3# Initialize the parser with a path to a Dockerfile or a file-like object
4# You can also use content directly: DockerfileParser(content='FROM fedora\n...')
5dfp = DockerfileParser(path='Dockerfile')
6
7# Get the value of a specific instruction (e.g., 'FROM')
8print(f"Base image: {dfp.baseimage}")
9
10# Access all instructions as a list of dictionaries
11print(f"Instructions: {dfp.structure}")
12
13# Access or modify environment variables
14print(f"ENV variables: {dfp.envs}")
15
16# Update an instruction
17dfp.baseimage = 'ubuntu:latest'
18
19# Access the modified Dockerfile content
20print(dfp.content)