build.yml

name: Build
on:
  push:
    branches: ["master"]
  pull_request:
    types: [ opened, synchronize ]
  workflow_dispatch:

# automatically cancel previous runs on the same PR
# https://stackoverflow.com/questions/66335225/how-to-cancel-previous-runs-in-the-pr-when-you-push-new-commitsupdate-the-curre/67939898#67939898
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-22.04

    steps:
      - uses: actions/checkout@v4
        with:
          # https://github.com/actions/checkout/issues/626
          # This is correct, because we're using a merge queue (mergify) which only merges when built against the latest target branch.
          # https://docs.mergify.com/actions/queue/
          ref: ${{ github.event.pull_request.head.sha }}

      - uses: coursier/cache-action@v6
      - uses: olafurpg/setup-scala@v14
        with:
          java-version: openjdk@1.17


      # https://github.com/actions/cache/blob/master/examples.md#node---yarn
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn cache dir)"

      - name: Cache yarn
        uses: actions/cache@v4
        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-yarn-

      - name: Cache Scalablytyped transpilations
        uses: actions/cache@v4
        with:
          path: |
            ~/.ivy2/local/org.scalablytyped
            ~/.cache/scalablytyped
          key: ${{ runner.os }}-scalablytyped-${{ hashfiles('build.sbt') }}-${{ hashFiles('*/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-scalablytyped-


      - name: load envrc
        uses: HatsuneMiku3939/direnv-action@v1

      - name: Compile and Bundle
        run: |
          # Runner has 7G of RAM, so 4G for sbt is ok here:
          # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
          ENABLE_FATAL_WARNINGS=true sbt --mem 4096 \
            compile Test/compile \
            test \
            scalafmtCheck scalafmtSbtCheck \
            {webapp,lambda}/fastOptJS/webpack

      - uses: hashicorp/setup-terraform@v3

      - name: Validate Terraform
        run: |
          cd terraform

          cat <<EOF > terraform.tf
          provider "aws" {
            region = "eu-central-1"
          }

          provider "aws" {
            alias  = "us-east-1"
            region = "us-east-1"
          }
          EOF

          terraform init
          terraform validate

          rm -r .terraform.lock.hcl terraform.tf

      - name: Yarn install
        run: yarn install --frozen-lockfile

      - name: Prepare End-to-End Tests
        run: |
          # Start frontend dev-webserver
          (
            cd webapp/target/scala-2.13/scalajs-bundler/main
            node node_modules/webpack-dev-server/bin/webpack-dev-server.js --config webpack.config.dev.js --port $FRONTEND_PORT || kill 0
          ) &

          # Start the lambda backend
          (npx fun-local-env \
              --auth $AUTH_PORT \
              --ws $WS_PORT \
              --http $HTTP_PORT \
              --http-api lambda/target/scala-2.13/scalajs-bundler/main/lambda-fastopt.js httpApi \
              --http-rpc lambda/target/scala-2.13/scalajs-bundler/main/lambda-fastopt.js httpRpc \
              --ws-rpc lambda/target/scala-2.13/scalajs-bundler/main/lambda-fastopt.js wsRpc \
              --ws-event-authorizer lambda/target/scala-2.13/scalajs-bundler/main/lambda-fastopt.js wsEventAuth \
                > /tmp/local-env-logs 2>&1 || kill 0) &

          # Test http api
          until nc -z 127.0.0.1 $HTTP_PORT &>/dev/null; do sleep 0.5; done
          [ "$(curl -v localhost:$HTTP_PORT/books/drama/2011?limit=10)" == '[{"title":"Programming in Scala"}]' ]

          # Wait until the dev server is running
          npx wait-on http://localhost:$FRONTEND_PORT

      - name: Cypress run (UI tests)
        uses: cypress-io/github-action@v6.7.5

      - name: On E2E test failure, print logs
        if: failure()
        run: if [[ -f /tmp/local-env-logs ]]; then cat /tmp/local-env-logs; fi

      - name: Production build
        run: |
          # Runner has 7G of RAM, so 4G for sbt is ok here:
          # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
          ENABLE_FATAL_WARNINGS=true sbt --mem 4096 \
            prod

      - name: Check if working directory is clean
        run: git diff --quiet --exit-code || (git status && false)

      # - name: Debug over SSH (tmate)
      #   # if: ${{ failure() }}
      #   uses: mxschmitt/action-tmate@v3
      #   with:
      #     limit-access-to-actor: true