An example circleci/config.yml file

.circleci-config.yml

defaults: &defaults
  working_directory: ~/gatsby/

node: &node
  docker:
    - image: circleci/node:12

alpine: &alpine
  docker:
    - image: markgono/alpine-vps-worker

version: 2.1
jobs:
  shellcheck:
    docker:
      - image: koalaman/shellcheck-alpine:latest
    steps:
      - checkout
      - run:
          name: Check Scripts
          command: |
            find . -type f -name '*.sh' | wc -l
            find . -type f -name '*.sh' | xargs shellcheck --external-sources

  install-dependencies:
    <<: *defaults
    <<: *node
    steps:
      - checkout:
          path: ~/gatsby/

      - attach_workspace:
          at: ~/gatsby/

      - restore_cache:
          key: node_modules-{{ checksum "package.json" }}

      - run:
          name: Install Node Modules
          command: npm i

      - save_cache:
          key: node_modules-{{ checksum "package.json" }}
          paths:
            - node_modules

  create-config:
    <<: *defaults
    <<: *alpine
    steps:
      - checkout:
          path: ~/gatsby/
      - run:
          name: Create config
          working_directory: ~/gatsby/scripts/
          command: >
            sudo -E sh ./create_config.sh
      - persist_to_workspace:
          root: ~/gatsby/
          paths:
            - scripts/config.sh

  test:
    <<: *defaults
    <<: *node
    steps:
      - checkout:
          path: ~/gatsby/
      - restore_cache:
          key: node_modules-{{ checksum "package.json" }}
      - run:
          name: Run tests
          command: |
            npm test

  build:
    <<: *defaults
    <<: *node
    steps:
      - checkout:
          path: ~/gatsby/
      - restore_cache:
          key: node_modules-{{ checksum "package.json" }}
      - run:
          name: Build project
          command: |
            CI=false npm run build:ci
      - persist_to_workspace:
          root: ~/gatsby/
          paths:
            - public
            - scripts

  deploy:
    <<: *defaults
    <<: *alpine
    steps:
      - attach_workspace:
          at: ~/gatsby/
      - add_ssh_keys:
          fingerprints:
            - "4d:1f:ae:e9:01:0d:7b:35:ab:59:ba:ac:7d:e6:49:c4"
      - run:
          name: Verify remote host
          command: |
            ssh-keyscan $REMOTE_URL >> ~/.ssh/known_hosts
      - run:
          name: Deploy scripts to remote
          working_directory: ~/gatsby/scripts/
          command: |
            rsync -va --delete . $REMOTE_USER@$REMOTE_URL:scripts
      - run:
          name: Deploy public directory to remote
          working_directory: ~/gatsby/public/
          command: |
            rsync -va --delete . $REMOTE_USER@$REMOTE_URL:$REMOTE_DIR
      - run:
          name: Connect to remote
          command: |
            ssh -o StrictHostKeyChecking=no $REMOTE_USER@$REMOTE_URL '
            cd scripts && . config.sh && echo "$PASSWORD" | sudo -S sh deploy.sh'

workflows:
  version: 2
  push:
    jobs:
      - shellcheck
      - install-dependencies:
          filters:
            branches:
              only:
                - master
      - test:
          requires:
            - install-dependencies
      - build:
          requires:
            - install-dependencies
          filters:
            branches:
              only:
                - master
      - create-config:
          filters:
            branches:
              only:
                - master
      - deploy:
          requires:
            - build
            - create-config
          filters:
            branches:
              only:
                - master