Move between two repositories more cleanly during patch #7

	---
	name: Apply PR changes to serverless
	on:
	pull_request_target:
	types:
	- closed
	- labeled

	jobs:
	apply-patch:
	name: Apply patch
	runs-on: ubuntu-latest
	# Only react to merged PRs for security reasons.
	# See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target.
	if: >
	github.event.pull_request.merged
	&& (
	(
	github.event.action == 'closed'
	&& contains(github.event.pull_request.labels.*.name, 'apply-to-serverless')
	)
	\|\|
	(
	github.event.action == 'labeled'
	&& github.event.label.name == 'apply-to-serverless'
	)
	)
	steps:
	- uses: actions/checkout@v4
	with:
	repository: elastic/elasticsearch-js
	ref: '${{ github.event.pull_request.merge_commit_sha }}'
	path: elasticsearch-js
	- uses: actions/checkout@v4
	with:
	repository: elastic/elasticsearch-serverless-js
	ref: main
	path: elasticsearch-serverless-js
	- name: Generate patch file
	run: \|
	cd $GITHUB_WORKSPACE/elasticsearch-js
	git format-patch -1 --stdout ${{ github.event.pull_request.merge_commit_sha }} > /tmp/patch.diff
	- name: Apply patch file
	run: \|
	cd $GITHUB_WORKSPACE/elasticsearch-serverless-js
	git checkout -b apply-patch-${{ github.event.pull_request.id }}
	git apply -C1 --recount --reject /tmp/patch.diff \|\| exit 0
	comment='Patch applied from elastic/elasticsearch-js#${{ github.event.pull_request.id }}'
	for f in $(find . -name '*.rej'); do
	comment="$comment\n\n## Rejected patch \`$f`\:\n\`\`\`\n$(cat $f)\n\`\`\`"
	done
	gh pr create -t "Apply PR changes from elastic/elasticsearch-js#${{ github.event.pull_request.id }}" --body "$comment"

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