build-publish-image.yml

name: Build and Publish Bandit Images

on:
  release:
    types: [created]
  schedule:
    - cron: '0 0 * * 0' # Every Sunday at midnight
  workflow_dispatch:

jobs:
  build-and-publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:

    - name: Get latest release tag
      if: github.event_name != 'release'
      id: get-latest-tag
      run: |
        TAG=$(curl -s https://api.github.com/repos/${{ github.repository }}/releases/latest | jq -r .tag_name)
        echo "Latest tag is $TAG"
        echo "RELEASE_TAG=$TAG" >> $GITHUB_ENV

    - name: Check out the repo
      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
      with:
        ref: ${{ github.event_name == 'release' && github.ref || env.RELEASE_TAG }}

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3

    - name: Log in to GitHub Container Registry
      uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Install Cosign
      uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 # v3.5.0
      with:
        cosign-release: 'v2.2.2'

    - name: Downcase github.repository value
      run: |
        echo "IMAGE_NAME=`echo ${{github.repository}} | tr '[:upper:]' '[:lower:]'`" >>${GITHUB_ENV}

    - name: Build and push Docker image
      id: build-and-push
      uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5
      with:
        context: .
        file: ./docker/Dockerfile
        push: true
        tags: ghcr.io/${{ env.IMAGE_NAME }}/bandit:latest
        platforms: linux/amd64, linux/arm64, linux/arm/v7, linux/arm/v8

    - name: Sign the image
      env:
        TAGS: ghcr.io/${{ env.IMAGE_NAME }}/bandit:latest
        DIGEST: ${{ steps.build-and-push.outputs.digest }}
      run: |
        echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}