Rebuild and Deploy if Base Image Updates #158
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| name: Rebuild and Deploy if Base Image Updates | |
| env: | |
| BASE_IMAGE: alpine | |
| IMAGE_NAME: dns-redirect | |
| on: | |
| schedule: | |
| - cron: '0 0 * * *' | |
| jobs: | |
| check-and-build: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Set up Docker Buildx | |
| uses: docker/setup-buildx-action@v3 | |
| - name: Pull latest base image | |
| run: docker pull ${{ env.BASE_IMAGE }} | |
| - name: Check if base image is updated | |
| id: image_updated | |
| run: | | |
| DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' ${{ env.BASE_IMAGE }}) | |
| if [ "$DIGEST" != "$(cat digest.txt 2>/dev/null)" ]; then | |
| echo "$DIGEST" > digest.txt | |
| echo "updated=$1" >> $GITHUB_OUTPUT | |
| else | |
| echo "echo 'updated=false" | |
| fi | |
| - name: Checkout repository | |
| if: steps.image_updated.outputs.updated == 'true' | |
| uses: actions/checkout@v4 | |
| - name: Login to Docker Hub | |
| if: steps.image_updated.outputs.updated == 'true' | |
| uses: docker/login-action@v3 | |
| with: | |
| username: ${{ vars.DOCKER_USERNAME }} | |
| password: ${{ secrets.DOCKER_PASSWORD }} | |
| - name: Build and push Docker image | |
| if: steps.image_updated.outputs.updated == 'true' | |
| uses: docker/build-push-action@v6 | |
| with: | |
| push: true | |
| platforms: linux/amd64,linux/arm64 | |
| tags: ${{ vars.DOCKER_USERNAME }}/${{ env.IMAGE_NAME }}:latest' >> $GITHUB_OUTPUT | |