Examples

It is possible to build, test, and deploy applications that run on Linux, Android, iOS and Windows with CircleCI. See the following snippets for a peek into how you can customize the configuration of a job for any platform. You may also configure jobs to run on multiple platforms in a single .circleci/config.yml file.

Linux with Docker

version: 2
jobs:
  build:
    working_directory: ~/mern-starter
    # The primary container is an instance of the first image listed. The job's commands run in this container.
    docker:
      - image: circleci/node:14.17.3-buster
        auth:
          username: mydockerhub-user
          password: $DOCKERHUB_PASSWORD  # context / project UI env-var reference
    # The secondary container is an instance of the second listed image which is run in a common network where ports exposed on the primary container are available on localhost.
      - image: mongo:3.4.4-jessie
        auth:
          username: mydockerhub-user
          password: $DOCKERHUB_PASSWORD  # context / project UI env-var reference
    steps:
      - checkout
      - run:
          name: Update npm
          command: 'sudo npm install -g npm@latest'
      - restore_cache:
          key: dependency-cache-{{ checksum "package-lock.json" }}
      - run:
          name: Install npm wee
          command: npm install
      - save_cache:
          key: dependency-cache-{{ checksum "package-lock.json" }}
          paths:
            - node_modules

Linux with machine

Note: Use of machine may require additional fees in a future pricing update.

To use the machine executor with the default machine image, set the machine key to true in .circleci/config.yml:

version: 2
jobs:
  build:
    machine: true

Android

version: 2
jobs:
  build:
    working_directory: ~/code
    docker:
      - image: circleci/android:api-25-alpha
        auth:
          username: mydockerhub-user
          password: $DOCKERHUB_PASSWORD  # context / project UI env-var reference
    environment:
      JVM_OPTS: -Xmx3200m
    steps:
      - checkout
      - restore_cache:
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
#      - run:
#         name: Chmod permissions #if permission for Gradlew Dependencies fail, use this.
#         command: sudo chmod +x ./gradlew
      - run:
          name: Download Dependencies
          command: ./gradlew androidDependencies

macOS

The macOS executor is not currently available on self-hosted installations of CircleCI Server

jobs:
  build-and-test:
    macos:
      xcode: "11.3.0"
    steps:
      ...
      - run:
          name: Run tests
          command: fastlane scan
          environment:
            SCAN_DEVICE: iPhone 6
            SCAN_SCHEME: WebTests

Windows

version: 2.1 # Use version 2.1 to enable orb usage.

orbs:
  win: circleci/windows@2.2.0 # The Windows orb give you everything you need to start using the Windows executor.

jobs:
  build: # name of your job
    executor:
      name: win/default # executor type
      size: "medium" # resource class, can be "medium", "large", "xlarge", "2xlarge", defaults to "medium" if not specified

    steps:
      # Commands are run in a Windows virtual machine environment
      - checkout
      - run: Write-Host 'Hello, Windows'

version: 2

jobs:
  build: # name of your job
    machine:
      image: windows-default # Windows machine image
    resource_class: windows.medium
    steps:
      # Commands are run in a Windows virtual machine environment
        - checkout
        - run: Write-Host 'Hello, Windows'