Fix CI build-time parallelism + support the same env var in `cuda.core` #775

	# Copyright (c) 2024-2025, NVIDIA CORPORATION & AFFILIATES. ALL RIGHTS RESERVED.
	#
	# SPDX-License-Identifier: Apache-2.0

	name: "CI: Backport the merged PR"

	on:
	pull_request_target:
	types: [closed, labeled]
	branches:
	- main

	permissions:
	contents: write # so it can comment
	pull-requests: write # so it can create pull requests

	jobs:
	backport:
	name: Backport pull request
	if: ${{ github.repository_owner == 'nvidia' &&
	github.event.pull_request.merged == true &&
	contains( github.event.pull_request.labels.*.name, 'to-be-backported')
	}}
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

	- name: Load branch name
	id: get-branch
	run: \|
	OLD_BRANCH=$(cat .github/BACKPORT_BRANCH)
	echo "OLD_BRANCH=${OLD_BRANCH}" >> $GITHUB_ENV

	- name: Create backport pull requests
	uses: korthout/backport-action@0193454f0c5947491d348f33a275c119f30eb736 # v3.2.1
	with:
	copy_assignees: true
	copy_labels_pattern: true
	copy_requested_reviewers: true
	target_branches: ${{ env.OLD_BRANCH }}

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