CircleCI config.yml sample

config.yml

version: 2.1
commands:
  buildimage:
    description: "Build docker image"
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: "Install git command"
          command: "apk add git"
      - run:
          name: "Build docker image"
          command: |
            FILES=$(git log --max-count 1 --name-only --oneline | awk 'NR>1 {print}' | grep Dockerfile)
            for FILE in $FILES
            do
              IMAGE=$(dirname "$FILE")
              docker build --force-rm --no-cache --pull --rm --squash --tag $IMAGE $IMAGE
            done
      - run:
        name: "Push docker image to registry"
        command: |
            FILES=$(git log --max-count 1 --name-only --oneline | awk 'NR>1 {print}' | grep Dockerfile)
            for FILE in $FILES
            do
              IMAGE=$(dirname "$FILE")
              docker push $IMAGE
            done
executors:
  default:
    docker:
      - image: docker:stable
jobs:
  build:
    executor: default
    steps:
      - buildimage