mirror.yml

name: Mirror Dependencies
# We mirror upstream container images like Migra, imgproxy, etc. because these
# are usually only available on certain image registry and not others (e.g. only
# on Docker Hub and not on ghcr.io or AWS ECR).
#
# For container images that we control, we usually publish to Docker Hub,
# ghcr.io, and AWS ECR.

on:
  # We can't trigger the mirror job on PR merge because certain tests would fail
  # until we mirror some images. E.g. a PR to update the imgproxy image version
  # would fail, because there is a test that creates a container from the
  # updated image version, which would fail because the image hasn't been
  # mirrored yet. It's a catch-22!
  #
  # TODO: Make the cli start test run *after* we mirror images (if needed).
  pull_request_review:
    types:
      - submitted
  workflow_dispatch:

jobs:
  setup:
    runs-on: ubuntu-latest
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.review.state == 'approved' }}
    outputs:
      tags: ${{ steps.list.outputs.tags }}
      curr: ${{ steps.curr.outputs.tags }}
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache: true
      - id: list
        run: |
          echo "tags=$(go run tools/listdep/main.go)" >> $GITHUB_OUTPUT
      - id: curr
        name: List main branch dependencies
        if: github.ref != 'refs/heads/main'
        run: |
          git fetch origin main
          git checkout main
          echo "tags=$(go run tools/listdep/main.go)" >> $GITHUB_OUTPUT

  publish:
    needs:
      - setup
    if: ${{ needs.setup.outputs.tags != needs.setup.outputs.curr }}
    strategy:
      matrix:
        src: ${{ fromJson(needs.setup.outputs.tags) }}
    # Call workflow explicitly because events from actions cannot trigger more actions
    uses: ./.github/workflows/mirror-image.yml
    with:
      image: ${{ matrix.src }}
    secrets: inherit