chore: add label `build-image-on-pr` to trigger a build #7717

	name: PR for release branch
	on:
	pull_request:
	branches:
	- main
	types: ["closed", "labeled"]

	jobs:
	get-release-branches:
	if: \|
	github.event.pull_request.merged &&
	((github.event.action == 'labeled' && startsWith(github.event.label.name, 'need-cherry-pick')) \|\|
	(github.event.action == 'closed' && contains(toJson(github.event.pull_request.labels), 'need-cherry-pick')))
	runs-on: ubuntu-latest
	outputs:
	branches: ${{ steps.get-release-branches.outputs.branches }}
	steps:
	- name: Get release branches
	id: get-release-branches
	run: \|
	if [[ ${{ github.event.action }} == 'labeled' ]]; then
	echo "branches=[\"$(echo ${{ github.event.label.name }} \| cut -d '-' -f 4-)\"]" >> "$GITHUB_OUTPUT"
	else
	labels='${{ toJson(github.event.pull_request.labels) }}'
	echo branches=$(echo "$labels" \| jq -r '.[] \| select(.name \| contains("need-cherry-pick")).name' \| cut -d '-' -f 4- \| jq --raw-input . \| jq --slurp . -c) >> "$GITHUB_OUTPUT"
	fi

	release_pull_request:
	needs:
	- get-release-branches
	runs-on: ubuntu-latest
	strategy:
	matrix:
	branch: ${{ fromJson(needs.get-release-branches.outputs.branches) }}
	steps:
	- name: checkout
	uses: actions/checkout@v1
	- name: Create PR to branch
	uses: risingwavelabs/github-action-cherry-pick@master
	with:
	pr_branch: ${{ matrix.branch }}
	pr_labels: 'cherry-pick'
	pr_body: ${{ format('Cherry picking \#{0} onto branch {1}', github.event.number, matrix.branch) }}
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	permissions:
	issues: write
	pull-requests: write
	contents: write

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