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path: root/.github/workflows/docker-publish.yml
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name: Publish Docker Image

on:
  push:
    tags:
      - '*'
  pull_request:
    branches:
      - 'main'

env:
  IMAGE_NAME: ${{ github.repository }}


jobs:
  build:

    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@main

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v2

      - name: Log into docker hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v3
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Sign the published Docker image
        if: ${{ github.event_name != 'pull_request' }}
        env:
          COSIGN_EXPERIMENTAL: "true"
        run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign {}@${{ steps.build-and-push.outputs.digest }}