Prepare patch release #6

	name: Prepare patch release
	on:
	workflow_dispatch:

	jobs:
	prepare-patch-release:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- run: \|
	if [[ ! $GITHUB_REF_NAME =~ ^release/v[0-9]+\.[0-9]+\.x$ ]]; then
	echo this workflow should only be run against release branches
	exit 1
	fi

	if ! grep --quiet "^## Unreleased$" CHANGELOG.md; then
	echo the change log is missing an \"Unreleased\" section
	exit 1
	fi

	- name: Set environment variables
	run: \|
	version=$(.github/scripts/get-version.sh)
	if [[ $version =~ ^([0-9]+\.[0-9]+)\.([0-9]+)$ ]]; then
	major_minor="${BASH_REMATCH[1]}"
	patch="${BASH_REMATCH[2]}"
	else
	echo "unexpected version: $version"
	exit 1
	fi
	echo "VERSION=$major_minor.$((patch + 1))" >> $GITHUB_ENV

	- name: Update version
	run: sed -Ei "s/[0-9]+\.[0-9]+\.[0-9]+/$VERSION/" version.gradle.kts

	- name: Update the change log with the approximate release date
	run: \|
	date=$(date "+%Y-%m-%d")
	sed -Ei "s/^## Unreleased$/## Version $VERSION ($date)/" CHANGELOG.md

	- name: Use CLA approved github bot
	run: .github/scripts/use-cla-approved-github-bot.sh

	- name: Create pull request
	env:
	# not using secrets.GITHUB_TOKEN since pull requests from that token do not run workflows
	GH_TOKEN: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}
	run: \|
	message="Prepare release $VERSION"
	branch="opentelemetrybot/prepare-release-${VERSION}"

	git checkout -b $branch
	git commit -a -m "$message"
	git push --set-upstream origin $branch
	gh pr create --title "[$GITHUB_REF_NAME] $message" \
	--body "$message." \
	--base $GITHUB_REF_NAME

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