docker.yml

# Build Hermes Docker image, push to Docker Hub and GHCR.io.

name: Docker

on:
  workflow_dispatch:
  push:
    tags:
      - v[0-9]+.*

env:
  REGISTRY_IMAGE: informalsystems/hermes

jobs:
  docker-build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - id: linux/amd64
            name: amd64
          - id: linux/arm64
            name: arm64
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
          tags: |
            type=ref,event=tag
            type=ref,event=branch
            type=semver,pattern={{version}}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./ci/release/hermes.Dockerfile
          platforms: ${{ matrix.platform.id }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.platform.name }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  docker-merge:
    runs-on: ubuntu-latest
    needs:
      - docker-build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          pattern: digests-*
          merge-multiple: true
          path: /tmp/digests

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
          tags: |
            type=ref,event=tag
            type=ref,event=branch
            type=semver,pattern={{version}}

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create --tag ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }} \
            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Push image to GHCR
        run: |
          docker buildx imagetools create \
            --tag ghcr.io/${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }} \
            ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}