# Configuring CI Using Azure Pipelines and Nx

Below is an example of an Azure Pipelines setup for an Nx workspace - building and testing only what is affected.

Unlike `GitHub Actions` and `CircleCI`, you don't have the metadata to help you track the last successful run on `main`. In the example below, the base is set to `HEAD~1` (for push) or branching point (for pull requests), but a more robust solution would be to tag an SHA in the main job once it succeeds and then use this tag as a base. You can also try [using the devops CLI within the pipeline yaml](/recipes/other/azure-last-successful-commit). See the [nx-tag-successful-ci-run](https://github.com/nrwl/nx-tag-successful-ci-run) and [nx-set-shas](https://github.com/nrwl/nx-set-shas) (version 1 implements tagging mechanism) repositories for more information.

We also have to set `NX_BRANCH` explicitly.

```yaml
trigger:
  - main
pr:
  - main

variables:
  CI: 'true'
  ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
    NX_BRANCH: $(System.PullRequest.PullRequestNumber)
    TARGET_BRANCH: $[replace(variables['System.PullRequest.TargetBranch'],'refs/heads/','origin/')]
    BASE_SHA: $(git merge-base $(TARGET_BRANCH) HEAD)
  ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
    NX_BRANCH: $(Build.SourceBranchName)
    BASE_SHA: $(git rev-parse HEAD~1)
  HEAD_SHA: $(git rev-parse HEAD)

jobs:
  - job: main
    pool:
      vmImage: 'ubuntu-latest'
    steps:
      - script: npm ci

      - script: npx nx format:check

      - script: npx nx affected --base=$(BASE_SHA) -t lint --parallel=3
      - script: npx nx affected --base=$(BASE_SHA) -t test --parallel=3 --configuration=ci
      - script: npx nx affected --base=$(BASE_SHA) -t build --parallel=3
```

The `main` job implements the CI workflow.

{% nx-cloud-section %}

## Distributed CI with Nx Cloud

Read more about [Distributed Task Execution (DTE)](/core-features/distribute-task-execution).

```yaml
trigger:
  - main
pr:
  - main

variables:
  CI: 'true'
  ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
    NX_BRANCH: $(System.PullRequest.PullRequestNumber)
    TARGET_BRANCH: $[replace(variables['System.PullRequest.TargetBranch'],'refs/heads/','origin/')]
    BASE_SHA: $(git merge-base $(TARGET_BRANCH) HEAD)
  ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
    NX_BRANCH: $(Build.SourceBranchName)
    BASE_SHA: $(git rev-parse HEAD~1)
  HEAD_SHA: $(git rev-parse HEAD)

jobs:
  - job: agents
    strategy:
      parallel: 3
    displayName: Nx Cloud Agent
    pool:
      vmImage: 'ubuntu-latest'
    steps:
      - script: npm ci
      - script: npx nx-cloud start-agent

  - job: main
    displayName: Nx Cloud Main
    pool:
      vmImage: 'ubuntu-latest'
    steps:
      - script: npm ci
      - script: npx nx-cloud start-ci-run --stop-agents-after="build"

      - script: npx nx-cloud record -- npx nx format:check --base=$(BASE_SHA) --head=$(HEAD_SHA)
      - script: npx nx affected --base=$(BASE_SHA) --head=$(HEAD_SHA) -t lint --parallel=3 & npx nx affected --base=$(BASE_SHA) --head=$(HEAD_SHA) -t test --parallel=3 --configuration=ci & npx nx affected --base=$(BASE_SHA) --head=$(HEAD_SHA) -t build --parallel=3
```

You can also use our [ci-workflow generator](/packages/workspace/generators/ci-workflow) to generate the pipeline file.

{% /nx-cloud-section %}