release.yml

name: Release

# Build + push the two production images, then deploy with Helm:
#   push to main  -> build -> deploy to STAGING
#   push tag v*   -> build -> deploy to PRODUCTION (gated by the environment's
#                             required reviewers)
#   manual        -> build only (workflow_dispatch)
#
# Deploys are OFF until a cluster exists. To enable, set the repository
# variable DEPLOY_ENABLED=true (Settings -> Secrets and variables -> Actions ->
# Variables) and add the per-environment secret:
#   staging / production:  KUBE_CONFIG  (base64-encoded kubeconfig for the cluster)
# Until then the deploy jobs are skipped and this workflow only builds + pushes
# images to GHCR (using the built-in GITHUB_TOKEN, packages: write).

on:
  push:
    branches: [main]
    tags: ["v*"]
  workflow_dispatch:

concurrency:
  group: release-${{ github.ref }}
  cancel-in-progress: false

env:
  REGISTRY: ghcr.io

jobs:
  images:
    name: Build & push (${{ matrix.component }})
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      matrix:
        include:
          - component: backend
            context: backend
            dockerfile: backend/Dockerfile.prod
          - component: frontend
            context: frontend
            dockerfile: frontend/Dockerfile.prod
    steps:
      - uses: actions/checkout@v4

      - uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Image metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/querywise-${{ matrix.component }}
          tags: |
            type=raw,value=${{ github.sha }}
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build & push
        uses: docker/build-push-action@v6
        with:
          context: ${{ matrix.context }}
          file: ${{ matrix.dockerfile }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # Frontend is built same-origin; nginx proxies /api to the backend.
          build-args: ${{ matrix.component == 'frontend' && 'VITE_API_URL=' || '' }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  deploy-staging:
    name: Deploy to staging
    needs: images
    if: github.ref == 'refs/heads/main' && vars.DEPLOY_ENABLED == 'true'
    runs-on: ubuntu-latest
    environment: staging
    steps:
      - uses: actions/checkout@v4
      - uses: ./.github/actions/helm-deploy
        with:
          environment: staging
          image_tag: ${{ github.sha }}
          kube_config: ${{ secrets.KUBE_CONFIG }}

  deploy-prod:
    name: Deploy to production
    needs: images
    if: startsWith(github.ref, 'refs/tags/v') && vars.DEPLOY_ENABLED == 'true'
    runs-on: ubuntu-latest
    environment: production
    steps:
      - uses: actions/checkout@v4
      - uses: ./.github/actions/helm-deploy
        with:
          environment: production
          image_tag: ${{ github.sha }}
          kube_config: ${{ secrets.KUBE_CONFIG }}