Pass environment created in codebuild action to downstream action in codepipeline

Question

I'm new to codepipeline & I have multiple actions in a build stage in codepipeline, which 1 buildspec similar to below , and i want to dynamically create a variable here in the python file which i need for a downstream action.

version: 1
phases:
  install:
    runtime-version:
      python: 3.9
    commands:
      - python -m pip install --upgrade pip 
  build:
    commands:
      - python code/get_date.py

get_date.py

import datetime
if __name__ == "__main__":
    current_date = strftime("%Y-%m-%d %H:%M:%S", gmtime())

Then I have a second buildspec file which runs in the second action

version: 1
phases:
  install:
    runtime-version:
      python: 3.9
    commands:
      - python -m pip install --upgrade pip 
  build:
    commands:
      - python code/process_date.py

process_date.py

if __name__ == "__main__":
    # get current date somehow from previous action
    print(current_date)

How do I accomplish something like this? And what is the best recommendation? Would i use output artifacts or variables? And how are they used to pass values like this between stages?

Any help greatly appreciated.

Marcin · Accepted Answer · 2022-02-17 04:33:00Z

6

CodeBuild can output variables to be used in other stages or actions in your CodePipeline. These variables are called CodeBuild action output variables and are defined using env/exported-variables in your buildspec.yml.

General info how to consume and use these variables in a CP are described in Working with variables AWS docs.

answered Feb 17, 2022 at 4:33

Marcin

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2 Comments

ersh Over a year ago

How do these variables get created for export in the python script in codebuild? Do i need to do anything to write to an environment variable?

Marcin Over a year ago

@ersh Did you read the docs? It explains you have to define them.

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