add ci changelog #8

	# Reference:
	# - https://github.com/actions/checkout
	# - https://github.com/actions/setup-python
	# - https://github.com/8BitJonny/gh-get-current-pr
	# - https://github.com/snnaplab/get-labels-action


	name: ci-changelog

	on:
	pull_request:
	types: [opened, synchronize, reopened, labeled, unlabeled]

	push:
	branches:
	- "main"
	- "v*x"
	- "!conda-lock-auto-update"
	- "!pre-commit-ci-update-config"
	- "!dependabot/*"

	workflow_dispatch:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	changelog:
	name: 'validate changelog'

	runs-on: ubuntu-latest

	defaults:
	run:
	shell: bash -l {0}

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- uses: actions/setup-python@v5
	with:
	python-version: '3.x'

	- name: 'get PR number'
	uses: 8BitJonny/gh-get-current-pr@v3
	id: PR

	- name: 'get PR labels'
	uses: snnaplab/get-labels-action@v1

	- name: 'validate'
	if: ${{ ! contains(fromJSON(env.LABELS), 'skip changelog') }}
	run: \|
	python -m pip install towncrier
	python -c "import sys; print(f'version = {sys.version}')"
	towncrier --version

	- name: 'summary'
	run: \|
	echo "labels: ${{ env.LABELS }}"
	echo "PR: ${{ steps.PR.outputs.number }}"

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