docker.yaml

# GitHub actions workflow which builds and publishes the docker images.

name: Build docker images

on:
  push:
    tags: ["v*"]

permissions:
  contents: read
  id-token: write # needed for signing the images with GitHub OIDC Token

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Install Cosign
        uses: sigstore/cosign-installer@v3

      - name: Log in to DockerHub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_TOKEN }}

      - name: Calculate docker image tag
        id: set-tag
        uses: docker/metadata-action@master
        with:
          images: vectorim/matrix-content-scanner
          tags: |
            type=raw,value=latest
            type=pep440,pattern={{raw}}

      - name: Build and push all platforms
        id: build-and-push
        uses: docker/build-push-action@v3
        with:
          push: true
          labels: "gitsha1=${{ github.sha }}"
          tags: "${{ steps.set-tag.outputs.tags }}"
          file: "docker/Dockerfile"
          platforms: linux/amd64

      - name: Sign the images with GitHub OIDC Token
        env:
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
          TAGS: ${{ steps.set-tag.outputs.tags }}
        run: |
          images=""
          for tag in ${TAGS}; do
            images+="${tag}@${DIGEST} "
          done
          cosign sign --yes ${images}