Get pipeline execution ID from Codebuild | untested

get-codepipeline-execution-id.py

from boto3 import client
import jmespath
import os

codepipeline_client = client('codepipeline')
codepipeline_name = (os.environ['CODEBUILD_INITIATOR'], 'codepipeline/')

pipeline_response = codepipeline_client.get_pipeline_state(
    name="".join(codepipeline_name)
)

# stageStates[?actionStates[?latestExecution.externalExecutionId=='codebuild-demo-project:b1e6661e-e4f2-4156-9ab9-82a19EXAMPLE']].latestExecution.pipelineExecutionId

jmespath_search_expression = ('stageStates[?actionStates[?latestExecution.externalExecutionId=="',
                              os.environ['CODEBUILD_BUILD_ID'], '"]].latestExecution.pipelineExecutionId')

pipeline_execution_id = jmespath.search(
    expression="".join(jmespath_search_expression),
    data=pipeline_response)

print(pipeline_execution_id)