Merge pull request #7059 from Lyndon-Li/issue-fix-6663 #1

	name: build-image

	on:
	push:
	branches: [ main ]
	paths:
	- 'hack/build-image/Dockerfile'

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:

	- uses: actions/checkout@v2
	with:
	# The default value is "1" which fetches only a single commit. If we merge PR without squash or rebase,
	# there are at least two commits: the first one is the merge commit and the second one is the real commit
	# contains the changes.
	# As we use the Dockerfile's commit ID as the tag of the build-image, fetching only 1 commit causes the merge
	# commit ID to be the tag.
	# While when running make commands locally, as the local git repository usually contains all commits, the Dockerfile's
	# commit ID is the second one. This is mismatch with the images in Dockerhub
	fetch-depth: 2

	- name: Build
	run: make build-image

	# Only try to publish the container image from the root repo; forks don't have permission to do so and will always get failures.
	- name: Publish container image
	if: github.repository == 'vmware-tanzu/velero'
	run: \|
	docker login -u ${{ secrets.DOCKER_USER }} -p ${{ secrets.DOCKER_PASSWORD }}

	make push-build-image

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