ci-e2e.yml

#
# This workflow runs CI E2E tests with Cypress.
#
# It relies on the container image built by 'container-images-ci.yml'.
#
name: E2E CI

on:
    pull_request:

concurrency:
    group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
    cancel-in-progress: true

jobs:
    changes:
        runs-on: ubuntu-latest
        timeout-minutes: 5
        if: github.repository == 'PostHog/posthog'
        name: Determine need to run E2E checks
        # Set job outputs to values from filter step
        outputs:
            shouldTriggerCypress: ${{ steps.changes.outputs.shouldTriggerCypress }}
        steps:
            # For pull requests it's not necessary to check out the code
            - uses: dorny/paths-filter@v2
              id: changes
              with:
                  filters: |
                      shouldTriggerCypress:
                        # Avoid running E2E tests for irrelevant changes
                        # NOTE: we are at risk of missing a dependency here. We could make
                        # the dependencies more clear if we separated the backend/frontend
                        # code completely
                        - 'ee/**'
                        - 'posthog/**'
                        - 'hogvm/**'
                        - 'bin/*'
                        - frontend/**/*
                        - requirements.txt
                        - requirements-dev.txt
                        - package.json
                        - pnpm-lock.yaml
                        # Make sure we run if someone is explicitly change the workflow
                        - .github/workflows/ci-e2e.yml
                        - .github/actions/build-n-cache-inage/action.yml
                        # We use docker compose for tests, make sure we rerun on
                        # changes to docker-compose.dev.yml e.g. dependency
                        # version changes
                        - docker-compose.dev.yml
                        - Dockerfile

    # Job that lists and chunks spec file names and caches node modules
    chunks:
        needs: changes
        name: Cypress preparation
        runs-on: ubuntu-latest
        timeout-minutes: 5
        outputs:
            chunks: ${{ steps.chunk.outputs.chunks }}

        steps:
            - name: Check out
              uses: actions/checkout@v3

            - name: Group spec files into chunks of three
              id: chunk
              run: echo "chunks=$(ls cypress/e2e/* | jq --slurp --raw-input -c 'split("\n")[:-1] | _nwise(2) | join("\n")' | jq --slurp -c .)" >> $GITHUB_OUTPUT

    container:
        name: Build and cache container image
        runs-on: ubuntu-latest
        timeout-minutes: 60
        needs: [changes]
        permissions:
            contents: read
            id-token: write # allow issuing OIDC tokens for this workflow run
        steps:
            - name: Checkout
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: actions/checkout@v3
            - name: Get Docker image cached in Depot
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              # Build the container image in preparation for the E2E tests
              uses: ./.github/actions/build-n-cache-image
              with:
                  actions-id-token-request-url: ${{ env.ACTIONS_ID_TOKEN_REQUEST_URL }}

    cypress:
        name: Cypress E2E tests (${{ strategy.job-index }})
        runs-on: ubuntu-latest
        timeout-minutes: 60
        needs: [chunks, changes, container]
        permissions:
            id-token: write # allow issuing OIDC tokens for this workflow run

        strategy:
            # when one test fails, DO NOT cancel the other
            # containers, as there may be other spec failures
            # we want to know about.
            fail-fast: false
            matrix:
                chunk: ${{ fromJson(needs.chunks.outputs.chunks) }}

        steps:
            - name: Checkout
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: actions/checkout@v3

            - name: Install pnpm
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: pnpm/action-setup@v2
              with:
                  version: 8.x.x

            - name: Set up Node.js
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: actions/setup-node@v3
              with:
                  node-version: 18

            - name: Get pnpm cache directory path
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              id: pnpm-cache-dir
              run: echo "PNPM_STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT

            - name: Get cypress cache directory path
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              id: cypress-cache-dir
              run: echo "CYPRESS_BIN_PATH=$(npx cypress cache path)" >> $GITHUB_OUTPUT

            - uses: actions/cache@v3
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              id: pnpm-cache
              with:
                  path: |
                      ${{ steps.pnpm-cache-dir.outputs.PNPM_STORE_PATH }}
                      ${{ steps.cypress-cache-dir.outputs.CYPRESS_BIN_PATH }}
                  key: ${{ runner.os }}-pnpm-cypress-${{ hashFiles('**/pnpm-lock.yaml') }}
                  restore-keys: |
                      ${{ runner.os }}-pnpm-cypress-

            - name: Install package.json dependencies with pnpm
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              run: pnpm install --frozen-lockfile

            - name: Stop/Start stack with Docker Compose
              # these are required checks so, we can't skip entire sections
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              run: |
                  docker compose -f docker-compose.dev.yml down
                  docker compose -f docker-compose.dev.yml up -d

            - name: Wait for ClickHouse
              # these are required checks so, we can't skip entire sections
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              run: ./bin/check_kafka_clickhouse_up

            - name: Get Docker image cached in Depot
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              # We don't actually build the image here, because we use Depot, which acts as our cross-workflow cache.
              # The build is first initiated in container-images-ci.yml, so by the time this runs, some layers already
              # are cached, and the in-flight builds overall are deduplicated. According to Depot folks, this applies
              # even if the builds _start_ concurrently! In short, only one build per commit push is ever executed.
              uses: ./.github/actions/build-n-cache-image
              id: docker-build
              with:
                  actions-id-token-request-url: ${{ env.ACTIONS_ID_TOKEN_REQUEST_URL }}
                  load: true

            - name: Write .env # This step intentionally has no if, so that GH always considers the action as having run
              run: |
                  cat <<EOT >> .env
                  SECRET_KEY=6b01eee4f945ca25045b5aab440b953461faf08693a9abbf1166dc7c6b9772da
                  REDIS_URL=redis://localhost
                  DATABASE_URL=postgres://posthog:posthog@localhost:5432/posthog
                  KAFKA_HOSTS=kafka:9092
                  DISABLE_SECURE_SSL_REDIRECT=1
                  SECURE_COOKIES=0
                  OPT_OUT_CAPTURE=0
                  SELF_CAPTURE=0
                  E2E_TESTING=1
                  SKIP_SERVICE_VERSION_REQUIREMENTS=1
                  EMAIL_HOST=email.test.posthog.net
                  SITE_URL=http://localhost:8000
                  NO_RESTART_LOOP=1
                  CLICKHOUSE_SECURE=0
                  OBJECT_STORAGE_ENABLED=1
                  OBJECT_STORAGE_ENDPOINT=http://localhost:19000
                  OBJECT_STORAGE_ACCESS_KEY_ID=object_storage_root_user
                  OBJECT_STORAGE_SECRET_ACCESS_KEY=object_storage_root_password
                  GITHUB_ACTION_RUN_URL="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
                  EOT

            - name: Start PostHog
              # these are required checks so, we can't skip entire sections
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              run: |
                  mkdir -p /tmp/logs

                  echo "Starting PostHog using the container image ${{ steps.docker-build.outputs.tag }}"
                  DOCKER_RUN="docker run --rm --network host --add-host kafka:127.0.0.1 --env-file .env ${{ steps.docker-build.outputs.tag }}"

                  $DOCKER_RUN ./bin/migrate
                  $DOCKER_RUN python manage.py setup_dev

                  # only starts the plugin server so that the "wait for PostHog" step passes
                  $DOCKER_RUN ./bin/docker-worker &> /tmp/logs/worker.txt &
                  $DOCKER_RUN ./bin/docker-server &> /tmp/logs/server.txt &

            - name: Wait for PostHog
              # these are required checks so, we can't skip entire sections
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: iFaxity/wait-on-action@v1
              timeout-minutes: 3
              with:
                  verbose: true
                  log: true
                  resource: http://localhost:8000

            - name: Cypress run
              # these are required checks so, we can't skip entire sections
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: cypress-io/github-action@v5
              with:
                  config-file: cypress.e2e.config.ts
                  config: retries=2
                  spec: ${{ matrix.chunk }}
                  install: false

            - name: Archive test screenshots
              uses: actions/upload-artifact@v3
              with:
                  name: screenshots
                  path: cypress/screenshots
              if: ${{ failure() }}

            - name: Archive test downloads
              uses: actions/upload-artifact@v3
              with:
                  name: downloads
                  path: cypress/downloads
              if: ${{ failure() }}

            - name: Archive test videos
              uses: actions/upload-artifact@v3
              with:
                  name: videos
                  path: cypress/videos
              if: ${{ failure() }}

            - name: Archive accessibility violations
              if: needs.changes.outputs.shouldTriggerCypress == 'true'
              uses: actions/upload-artifact@v3
              with:
                  name: accessibility-violations
                  path: '**/a11y/'
                  if-no-files-found: 'ignore'

            - name: Show logs on failure
              # use artefact here, as I think the output will be too large for display in an action
              uses: actions/upload-artifact@v3
              with:
                  name: logs
                  path: /tmp/logs
              if: ${{ failure() }}