name: publish-workspace-server-image

# Builds and pushes Docker images to GHCR when staging is promoted to main.
# PRs target staging (default branch). Only main push triggers production builds.
# EC2 tenant instances pull the tenant image from GHCR.

on:
  push:
    branches: [main]
    paths:
      - 'workspace-server/**'
      - 'canvas/**'
      - 'manifest.json'
      - '.github/workflows/publish-platform-image.yml'
  workflow_dispatch:

permissions:
  contents: read
  packages: write

env:
  IMAGE_NAME: ghcr.io/molecule-ai/platform
  TENANT_IMAGE_NAME: ghcr.io/molecule-ai/platform-tenant

jobs:
  build-and-push:
    runs-on: [self-hosted, macos, arm64]
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Checkout sibling plugin repo
        # workspace-server/Dockerfile expects
        # ./molecule-ai-plugin-github-app-auth at build-context root because
        # the Go module has a `replace` directive pointing at /plugin inside
        # the image. Pre-repo-split the plugin lived in the monorepo; the
        # 2026-04-18 restructure moved it out but didn't add this clone step
        # — which is why publish has been failing since then.
        #
        # Uses a fine-grained PAT (PLUGIN_REPO_PAT) because the plugin repo
        # is private and the default GITHUB_TOKEN is scoped to THIS repo.
        # The PAT needs Contents:Read on Molecule-AI/molecule-ai-plugin-
        # github-app-auth. Falls back to the default token for the (rare)
        # case where an operator made the plugin repo public.
        uses: actions/checkout@v4
        with:
          repository: Molecule-AI/molecule-ai-plugin-github-app-auth
          path: molecule-ai-plugin-github-app-auth
          token: ${{ secrets.PLUGIN_REPO_PAT || secrets.GITHUB_TOKEN }}

      - name: Configure GHCR auth
        shell: bash
        env:
          GHCR_USER: ${{ github.actor }}
          GHCR_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -eu
          mkdir -p "${RUNNER_TEMP}/docker-config"
          GHCR_AUTH=$(printf '%s:%s' "${GHCR_USER}" "${GHCR_TOKEN}" | base64)
          umask 077
          printf '{"auths":{"ghcr.io":{"auth":"%s"}}}' "${GHCR_AUTH}" > "${RUNNER_TEMP}/docker-config/config.json"
          echo "DOCKER_CONFIG=${RUNNER_TEMP}/docker-config" >> "${GITHUB_ENV}"

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
        with:
          platforms: linux/amd64

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Compute tags
        id: tags
        run: |
          echo "sha=${GITHUB_SHA::7}" >> "$GITHUB_OUTPUT"

      # Canary-gated release: we publish :staging-<sha> ONLY here. The
      # :latest tag (which existing prod tenants auto-pull every 5 min)
      # is promoted by .github/workflows/canary-verify.yml after the
      # staging canary fleet green-lights this digest.
      # That means:
      #   - Every main merge produces a :staging-<sha> image
      #   - Canary tenants (configured to pull :staging-<sha>) pick it up
      #   - canary-verify.yml runs smoke tests against them
      #   - On green → canary-verify retags :staging-<sha> → :latest
      #   - On red → :latest stays on the prior good digest, prod is safe
      - name: Build & push platform image to GHCR (staging-<sha> only)
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./workspace-server/Dockerfile
          platforms: linux/amd64
          push: true
          tags: |
            ${{ env.IMAGE_NAME }}:staging-${{ steps.tags.outputs.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.description=Molecule AI platform (Go API server) — pending canary verify

      - name: Build & push tenant image to GHCR (staging-<sha> only)
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./workspace-server/Dockerfile.tenant
          platforms: linux/amd64
          push: true
          tags: |
            ${{ env.TENANT_IMAGE_NAME }}:staging-${{ steps.tags.outputs.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.description=Molecule AI tenant platform + canvas — pending canary verify