ci.yml

name: CI
on:
  push:
    branches:
      - main
  pull_request:

permissions:
  actions: read
  contents: read

env:
  NX_CLOUD_DISTRIBUTED_EXECUTION: true # this enables DTE
  NX_CLOUD_DISTRIBUTED_EXECUTION_AGENT_COUNT: 4 # expected number of agents
  NX_BRANCH: ${{ github.event.number || github.ref_name }}
  NX_CLOUD_ACCESS_TOKEN: ${{ secrets.NX_CLOUD_ACCESS_TOKEN }}
  NPM_TOKEN: ${{ secrets.NPM_TOKEN }} # this is needed if our pipeline publishes to npm

jobs:
  main:
    name: Nx Cloud - Main Job
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        name: Checkout [Pull Request]
        if: ${{ github.event_name == 'pull_request' }}
        with:
          # By default, PRs will be checked-out based on the Merge Commit, but we want the actual branch HEAD.
          ref: ${{ github.event.pull_request.head.sha }}
          # We need to fetch all branches and commits so that Nx affected has a base to compare against.
          fetch-depth: 0

      - uses: actions/checkout@v4
        name: Checkout [Default Branch]
        if: ${{ github.event_name != 'pull_request' }}
        with:
          # We need to fetch all branches and commits so that Nx affected has a base to compare against.
          fetch-depth: 0

      # Set node/npm/yarn versions using volta
      - uses: volta-cli/action@v4
        with:
          package-json-path: '${{ github.workspace }}/package.json'

      - name: Use the package manager cache if available
        uses: actions/setup-node@v3
        with:
          node-version: 20
          cache: 'npm'

      - name: Install dependencies
        run: npm ci --force

      - name: Check out the default branch
        if: github.ref != 'refs/head/main'
        run: git branch --track main origin/main

      - name: Initialize the Nx Cloud distributed CI run and stop agents when the build tasks are done
        run: npx nx-cloud start-ci-run --stop-agents-after=build

      - name: Run commands in parallel
        run: |
          pids=()
          # list of commands to be run on main has env flag NX_CLOUD_DISTRIBUTED_EXECUTION set to false
          NX_CLOUD_DISTRIBUTED_EXECUTION=false npx nx-cloud record -- npx nx format:check & pids+=($!)

          # list of commands to be run on agents
          npx nx affected -t lint,test --parallel=4 &
          npx nx affected -t component-test --parallel=1 &
          npx nx affected -t build --parallel=4 & 
          pids+=($!)

          # run all commands in parallel and bail if one of them fails
          for pid in ${pids[*]}; do
            if ! wait $pid; then
              exit 1
            fi
          done

          exit 0

  agents:
    name: Agent ${{ matrix.agent }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        # Add more agents here as your repository expands
        agent: [1, 2, 3, 4]
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # Set node/npm/yarn versions using volta
      - uses: volta-cli/action@v4
        with:
          package-json-path: '${{ github.workspace }}/package.json'

      - name: Use the package manager cache if available
        uses: actions/setup-node@v3
        with:
          node-version: 20
          cache: 'npm'

      - name: Install dependencies
        run: npm ci --force

      - name: Start Nx Agent ${{ matrix.agent }}
        run: npx nx-cloud start-agent
        env:
          NX_AGENT_NAME: ${{ matrix.agent }}