imphnen-frontend-service/.github/workflows/nix-build.yml

name: Nix Build & Deploy

on:
  push:
    branches: ['develop']
  pull_request:
    branches: ['develop']

jobs:
  detect:
    runs-on: ubuntu-latest
    outputs:
      affected: ${{ steps.affected.outputs.apps }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 22

      - name: Install dependencies
        run: npm ci --legacy-peer-deps

      - name: Detect affected apps
        id: affected
        run: |
          AFFECTED=$(npx nx show projects --affected --base=HEAD~1 --type=app 2>/dev/null | tr '\n' ' ')
          echo "Affected apps: $AFFECTED"
          APPS="[]"
          for app in landing backoffice gacha dimentorin hackathon infra qrcampaign; do
            if echo "$AFFECTED" | grep -qw "$app"; then
              APPS=$(echo "$APPS" | jq -c ". + [\"$app\"]")
            fi
          done
          echo "apps=$APPS" >> "$GITHUB_OUTPUT"
          echo "Matrix: $APPS"

  build:
    needs: detect
    if: needs.detect.outputs.affected != '[]'
    runs-on: ubuntu-latest
    strategy:
      matrix:
        app: ${{ fromJson(needs.detect.outputs.affected) }}
    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Setup Cachix
        uses: cachix/cachix-action@v15
        with:
          name: msdqn
          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'

      - name: Build ${{ matrix.app }}
        run: nix build .#${{ matrix.app }} -o result-${{ matrix.app }}

      - name: Push to Cachix
        if: github.event_name == 'push' && github.ref == 'refs/heads/develop'
        run: cachix push msdqn result-${{ matrix.app }}

  deploy:
    needs: build
    if: github.event_name == 'push' && github.ref == 'refs/heads/develop'
    runs-on: ubuntu-latest
    steps:
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Setup Cachix
        uses: cachix/cachix-action@v15
        with:
          name: msdqn
          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'

      - name: Setup SSH
        env:
          INFRA_DEPLOY_KEY: ${{ secrets.INFRA_DEPLOY_KEY }}
          SERVER_SSH_KEY: ${{ secrets.SERVER_SSH_KEY }}
        run: |
          mkdir -p ~/.ssh
          echo "${INFRA_DEPLOY_KEY}" > ~/.ssh/infra_deploy
          chmod 600 ~/.ssh/infra_deploy
          if [ -n "${SERVER_SSH_KEY}" ]; then
            echo "${SERVER_SSH_KEY}" > ~/.ssh/server_key
            chmod 600 ~/.ssh/server_key
          fi
          ssh-keyscan github.com >> ~/.ssh/known_hosts 2>/dev/null
          ssh-keyscan 167.235.70.37 >> ~/.ssh/known_hosts 2>/dev/null

      - name: Clone infrastructure
        run: |
          export GIT_SSH_COMMAND="ssh -i ~/.ssh/infra_deploy -o IdentitiesOnly=yes"
          git clone git@github.com:IMPHNEN/imphnen-infrastructure.git /tmp/infra

      - name: Update flake.lock
        working-directory: /tmp/infra
        run: |
          nix flake update imphnen-frontend
          if git diff --quiet flake.lock; then
            echo "flake.lock unchanged, skipping commit"
          else
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            export GIT_SSH_COMMAND="ssh -i ~/.ssh/infra_deploy -o IdentitiesOnly=yes"
            git add flake.lock
            git commit -m "chore: update imphnen-frontend-service to ${GITHUB_SHA::7}"
            git push
          fi

      - name: Deploy with clan
        working-directory: /tmp/infra
        run: |
          if [ -f ~/.ssh/server_key ]; then
            export NIX_SSHOPTS="-i $HOME/.ssh/server_key -o StrictHostKeyChecking=accept-new"
          fi
          nix develop .#default --command clan machines update hetzner

      - name: Cleanup SSH keys
        if: always()
        run: rm -f ~/.ssh/infra_deploy ~/.ssh/server_key