AWS CodeBuild buildspec.yml example for building a docker image and pushing it to a AWS ECS docker repo in another AWS account

aws-codebuild-cross-account-image-push.yml

version: 0.1

# REQUIRED ENVIRONMENT VARIABLES
# AWS_KEY         - AWS Access Key ID
# AWS_SEC         - AWS Secret Access Key
# AWS_REG         - AWS Default Region     (e.g. us-west-2)
# AWS_OUT         - AWS Output Format      (e.g. json)
# AWS_PROF        - AWS Profile name       (e.g. central-account)
# IMAGE_REPO_NAME - Name of the image repo (e.g. my-app)
# IMAGE_TAG       - Tag for the image      (e.g. latest)
# AWS_ACCOUNT_ID  - Remote AWS account id  (e.g. 555555555555)

phases:
  pre_build:
    commands:
      - printf "${AWS_KEY}\n${AWS_SEC}\n${AWS_REG}\n${AWS_OUT}\n" | aws configure --profile ${AWS_PROF}
      - $(aws ecr get-login --profile ${AWS_PROF})
  build:
    commands:
      - docker build -t $IMAGE_REPO_NAME .
      - docker tag $IMAGE_REPO_NAME:$IMAGE_TAG $AWS_ACCOUNT_ID.dkr.ecr.$AWS_REG.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG      
  post_build:
    commands:
      - docker push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_REG.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG