CircleCI Docker

This package will create a Docker image for CircleCI with specific versions of Ruby, Node, and Python. Every image will also include the latest versions of Chrome and Firefox (as well as chromedriver and geckodriver).

Installation

This package should be installed as a dependency of the project that the image is being generated for because the version of the package is included in the tag of the image that's generated.

$ yarn add --dev @ftw/circleci-docker

Generating an Image

Make sure Docker Desktop is installed and running first.

$ yarn run circleci-docker build friendsoftheweb

This will automatically detect the required versions of Ruby, Node, and Python (from .ruby-version, .nvmrc, and runtime.txt files) and start building Docker images.

To see all the output from the Docker build process, run the build command with the --verbose flag:

$ yarn run circleci-docker build --verbose friendsoftheweb

If you encounter issues during the build process, try running it again with the --noCache flag:

$ yarn run circleci-docker build --noCache friendsoftheweb

Because Docker caches layers based on the content of the command that created them, some commands (such as apt-get update) won't be run again if a cached layer exists. Building with the --noCache flag will cause Docker to ignore any previously cached build layers and start from scratch, ensuring that the latest version of each dependency is installed.

Updating the CircleCI Configuration

Once the Docker image has been generated, you'll need to update the CircleCI configuration for the project. Here's an example of the build configuration for a project that needs Ruby, Node, Python, and PostgreSQL (not included in the generated image):

version: 2

jobs:
  build:
    parallelism: 1
    docker:
      - image: friendsoftheweb/circleci-node-python-ruby:0.0.1-10.16.0-2.7.17-2.6.5
        environment:
          PGHOST: 127.0.0.1
          PGUSER: user
          NODE_ENV: test
          RAILS_ENV: test
          RACK_ENV: test
      - image: circleci/postgres:9.6
        environment:
          POSTGRES_DB: circle_ruby_test
          POSTGRES_PASSWORD: ''
          POSTGRES_USER: ubuntu