Configuring CI Using Bitbucket Pipelines and Nx

Below is an example of a Bitbucket Pipeline setup for an Nx workspace only building and testing what is affected.

image: node:16
pipelines:
  pull-requests:
    '**':
      - step:
          name: 'Build and test affected apps on Pull Requests'
          caches: # optional
            - node
          script:
            - npm ci
            - npx nx workspace-lint
            - npx nx format:check
            - npx nx affected --target=lint --base=origin/master --parallel --max-parallel=3
            - npx nx affected --target=test --base=origin/master --parallel --max-parallel=3 --ci --code-coverage
            - npx nx affected --target=build --base=origin/master --head=HEAD --parallel  --max-parallel=3

  branches:
    main:
      - step:
          name: "Build and test affected apps on 'main' branch changes"
          caches: # optional
            - node
          script:
            - npm ci
            - npx nx workspace-lint
            - npx nx format:check
            - npx nx affected --target=lint --base=origin/master --parallel --max-parallel=3
            - npx nx affected --target=test --base=HEAD~1 --parallel --max-parallel=3 --ci --code-coverage
            - npx nx affected --target=build --base=HEAD~1 --parallel  --max-parallel=3

The pull-requests and main jobs implement the CI workflow.