ENH: Retain docker image from PRs (#1685)

* ENH: Retain docker image from PRs

This will make it easier to quickly download and test PRs, using temporary
Github artifacts that expire after 7 days. Load into docker using the terminal:

unzip ants_image.tar.zip
docker load -i ants_image.tar

.github/workflows/ci-docker.yml

@@ -35,10 +35,24 @@ jobs:
  username: ${{ secrets.DOCKERHUB_USERNAME }}
  password: ${{ secrets.DOCKERHUB_TOKEN }}
  -
- name: Build and push
+ name: Build and load (PR) or push (commit/tag)
  uses: docker/build-push-action@v3
  with:
- context: .
- push: ${{ github.event_name != 'pull_request' }}
- tags: ${{ steps.meta.outputs.tags }}
- labels: ${{ steps.meta.outputs.labels }}
+ context: .
+ push: ${{ github.event_name != 'pull_request' }}
+ load: ${{ github.event_name == 'pull_request' }}
+ tags: ${{ steps.meta.outputs.tags }}
+ labels: ${{ steps.meta.outputs.labels }}
+ -
+ name: Export Docker image for PR
+ if: github.event_name == 'pull_request'
+ run: |
+ docker save antsx/ants:${{ steps.meta.outputs.version }} > ants_image.tar
+ -
+ name: Upload PR Docker image as artifact
+ if: github.event_name == 'pull_request'
+ uses: actions/upload-artifact@v3
+ with:
+ name: ants-docker-image
+ path: ants_image.tar
+ retention-days: 7