GMW/.github/workflows/deploy.yml

name: Build & Deploy (Nix)

on:
  push:
    branches: [main]
  workflow_dispatch:

concurrency:
  group: gmw-deploy
  cancel-in-progress: false

permissions:
  contents: read
  id-token: write

env:
  VPS_HOST: ${{ secrets.VPS_HOST }}
  VPS_USER: ${{ secrets.VPS_USER }}

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          fetch-depth: 0
          submodules: false

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

      - name: Install pnpm
        run: corepack enable && corepack prepare pnpm@11 --activate

      - name: Install deps (backend)
        working-directory: services/backend
        run: pnpm install --ignore-scripts --no-frozen-lockfile

      - name: Typecheck + test (backend)
        working-directory: services/backend
        run: |
          ./node_modules/.bin/tsc --noEmit
          # e2e.test.ts requires a live backend (API_BASE) — run unit tests only
          ./node_modules/.bin/vitest run --exclude "src/e2e.test.ts"

      - name: Install deps (discord-gateway)
        working-directory: services/discord-gateway
        run: pnpm install --ignore-scripts --no-frozen-lockfile

      - name: Typecheck + test (discord-gateway)
        working-directory: services/discord-gateway
        run: |
          ./node_modules/.bin/tsc --noEmit
          ./node_modules/.bin/vitest run

      - name: Biome check (all services)
        run: |
          cd services/backend && ./node_modules/.bin/biome check src/ tests/
          cd ../discord-gateway && ./node_modules/.bin/biome check src/

  build-and-deploy:
    needs: test
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        service: [backend, discord-gateway, proxy, frontend]
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          fetch-depth: 0
          submodules: false

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v22
        with:
          determinate: false
          extra-conf: |
            sandbox = false
            accept-flake-config = true

      - name: Cache Nix
        uses: DeterminateSystems/magic-nix-cache-action@v14
        with:
          use-flakehub: false

      - name: Build ${{ matrix.service }}
        id: build
        run: |
          nix build .#${{ matrix.service }} --impure --option sandbox false --print-build-logs
          STORE_PATH=$(readlink result)
          echo "store-path=$STORE_PATH" >> "$GITHUB_OUTPUT"
          echo "Build OK ${{ matrix.service }}: $STORE_PATH"

      - name: Setup SSH key
        env:
          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
        run: |
          mkdir -p ~/.ssh
          echo "$SSH_KEY" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          sed -i 's/\r$//' ~/.ssh/id_ed25519
          ssh-keygen -y -f ~/.ssh/id_ed25519 >/dev/null 2>&1 || { echo "SSH key invalid"; exit 1; }
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts 2>/dev/null

      # Push build result to Attic binary cache (attic.asepharyana.my.id) so
      # the VPS can substitute it instead of a single-stream `nix copy ssh://`.
      - name: Push to Attic cache
        if: ${{ secrets.ATTIC_TOKEN != '' }}
        env:
          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
        run: |
          STORE_PATH="${{ steps.build.outputs.store-path }}"
          # Install attic client (deterministic Nix build from flake)
          nix build github:DeterminateSystems/attic#attic --option sandbox false --no-link --print-out-paths > /tmp/attic-path
          ATTIC_BIN=$(cat /tmp/attic-path)/bin/attic
          "$ATTIC_BIN" login asepharyana https://attic.asepharyana.my.id "$ATTIC_TOKEN" >/dev/null 2>&1 || true
          "$ATTIC_BIN" push asepharyana:gmw "$STORE_PATH" --jobs 4

      # NOTE: env files /etc/gmw/backend.env & /etc/gmw/discord-gateway.env are
      # managed MANUALLY on the VPS (source of truth). CI only builds & deploys.
      - name: Deploy ${{ matrix.service }} to VPS
        run: |
          STORE_PATH="${{ steps.build.outputs.store-path }}"
          echo "=== Copying ${{ matrix.service }}: $STORE_PATH ==="
          if [ -n "${{ secrets.ATTIC_TOKEN }}" ]; then
            # Fast path: VPS substitutes from Attic cache (multi-stream) instead
            # of single-stream `nix copy ssh://`. Falls back to ssh copy if attic
            # substitute fails (e.g. cache miss on first deploy).
            ssh "$VPS_USER@$VPS_HOST" "sudo /nix/var/nix/profiles/default/bin/nix-store --realise '$STORE_PATH'" \
              || nix copy --to "ssh://$VPS_USER@$VPS_HOST" "$STORE_PATH"
          else
            nix copy --to "ssh://$VPS_USER@$VPS_HOST" "$STORE_PATH"
          fi

          echo "=== Updating profile ==="
          ssh "$VPS_USER@$VPS_HOST" "sudo /nix/var/nix/profiles/default/bin/nix-env --profile /nix/var/nix/profiles/gmw-${{ matrix.service }} --set '$STORE_PATH'"

          echo "=== Restarting service ===\n"
                    ssh "$VPS_USER@$VPS_HOST" \
                      "sudo systemctl daemon-reload && sudo systemctl restart gmw-${{ matrix.service }} && for i in \$(seq 1 15); do state=\$(sudo systemctl is-active gmw-${{ matrix.service }} 2>/dev/null || echo inactive); [ \"\$state\" = \"active\" ] && break; sleep 2; done; echo \"final-state=\$state\"; [ \"\$state\" = \"active\" ]" 
                    echo "✅ gmw-${{ matrix.service }} deployed"

  cleanup:
    # Bersihkan sampah Nix di VPS SETELAH semua deploy selesai: hapus generasi
    # profile lama + nix store gc. Profil yang sedang dipakai tidak disentuh.
    needs: build-and-deploy
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Nix GC on VPS
        env:
          VPS_HOST: ${{ secrets.VPS_HOST }}
          VPS_USER: ${{ secrets.VPS_USER }}
          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
        run: |
          mkdir -p ~/.ssh
          echo "$SSH_KEY" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts 2>/dev/null
          ssh "$VPS_USER@$VPS_HOST" "sudo /usr/local/bin/nix-gc-vps.sh" || echo "⚠️ Nix GC gagal (non-fatal)"