AWS CodeDeploy buildspec.yml for auto deploying AWS ECS from AWS ECR via AWS CodePipeline

buildspec.yml

version: 0.2

phases:
  install:
    runtime-versions:
      python: 3.7
  build:
    commands:
      - REPOSITORY_URI=$(cat imageDetail.json | python -c "import sys, json; print(json.load(sys.stdin)['ImageURI'].split('@')[0])")
      - IMAGE_TAG=$(cat imageDetail.json | python -c "import sys, json; print(json.load(sys.stdin)['ImageTags'][0])")
      - echo $REPOSITORY_URI:$IMAGE_TAG
  post_build:
    commands:
      - echo Writing image definitions file...
      - printf '[{"name":"task_name_here","imageUri":"%s"}]' $REPOSITORY_URI:$IMAGE_TAG > imagedefinitions.json
artifacts:
    files: imagedefinitions.json