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Advanced Config

CircleCI supports many advanced configuration options and features, check out the snippets below to get an idea of what is possible.

Check Your Scripts

version: 2
jobs:
  shellcheck:
    docker:
      - image: nlknguyen/alpine-shellcheck:v0.4.6
    steps:
      - checkout
      - run:
          name: Check Scripts
          command: |
            find . -type f -name '*.sh' | wc -l
            find . -type f -name '*.sh' | xargs shellcheck --external-sources

Test in the Browser

version: 2
jobs:
  build:
    docker:
      - image: circleci/node-jessie-browsers
    steps:
      - checkout
      - run: mkdir test-reports
      - run:
          name: Download Selenium
          command: curl -O http://selenium-release.storage.googleapis.com/3.5/selenium-server-standalone-3.5.3.jar
      - run:
          name: Start Selenium
          command: java -jar selenium-server-standalone-3.5.3.jar -log test-reports/selenium.log
          background: true

Test Databases

version: 2
jobs:
  build:
    
    # Primary container image where all commands run
    
    docker:
      - image: circleci/python:3.6.2-stretch-browsers
        environment:
          TEST_DATABASE_URL: postgresql://root@localhost/circle_test
          
    # Service container image
    
      - image: circleci/postgres:9.6.5-alpine-ram
        
    steps:
      - checkout
      - run: sudo apt-get update
      - run: sudo apt-get install postgresql-client-9.6
      - run: whoami
      - run: |
          psql \
          -d $TEST_DATABASE_URL \
          -c "CREATE TABLE test (name char(25));"
      - run: |
          psql \
          -d $TEST_DATABASE_URL \
          -c "INSERT INTO test VALUES ('John'), ('Joanna'), ('Jennifer');"
      - run: |
          psql \
          -d $TEST_DATABASE_URL \
          -c "SELECT * from test"

Run Docker Commands to Build Your Docker Images

jobs:
  build:
    steps:
      # ... steps for building/testing app ...

      - setup_remote_docker
      
      - run:
          name: Start container and verify it's working
          command: |
            set -x
            docker-compose up -d
            docker run --network container:contacts \
              appropriate/curl --retry 10 --retry-delay 1 --retry-connrefused http://localhost:8080/contacts/test

See Also

Optimizations