Create Release Tag #1

	name: Create Release Tag

	on:
	workflow_dispatch:
	inputs:
	release_ref:
	description: Git ref to tag
	required: true
	default: main

	permissions:
	contents: write

	env:
	git_user_name: localstack[bot]
	git_user_email: localstack-bot@users.noreply.github.com

	concurrency:
	group: create-release-tag
	cancel-in-progress: false

	jobs:
	create-tag:
	name: Create next CalVer tag
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v6
	with:
	ref: ${{ inputs.release_ref }}
	fetch-depth: 0

	- name: Configure Git user
	env:
	GIT_USER_NAME: ${{ env.git_user_name }}
	GIT_USER_EMAIL: ${{ env.git_user_email }}
	run: \|
	git config user.name "${GIT_USER_NAME}"
	git config user.email "${GIT_USER_EMAIL}"

	- name: Fetch tags
	run: git fetch --tags --force

	- name: Compute next CalVer tag
	id: next_tag
	run: \|
	set -euo pipefail
	year="$(date -u +%Y)"
	month="$(date -u +%-m)"
	prefix="${year}.${month}."

	latest="$(git tag --list "${prefix}*" --sort=-v:refname \| grep -E "^${year}\.${month}\.[0-9]+$" \| head -n 1 \|\| true)"
	if [[ -z "${latest}" ]]; then
	patch=0
	else
	patch="$(( ${latest##*.} + 1 ))"
	fi

	tag="${year}.${month}.${patch}"
	if git rev-parse -q --verify "refs/tags/${tag}" >/dev/null; then
	echo "Tag ${tag} already exists"
	exit 1
	fi

	echo "tag=${tag}" >> "${GITHUB_OUTPUT}"

	- name: Create and push tag
	run: \|
	tag="${{ steps.next_tag.outputs.tag }}"
	git tag -a "${tag}" -m "Release ${tag}"
	git push origin "${tag}"

	- name: Print created tag
	run: echo "Created tag ${{ steps.next_tag.outputs.tag }}"

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