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Update star history chart #42

	name: Update star history chart

	on:
	schedule:
	# Daily at 03:00 UTC.
	- cron: "0 3 * * *"
	workflow_dispatch: {}

	permissions:
	contents: write

	concurrency:
	group: star-history
	cancel-in-progress: false

	jobs:
	update-chart:
	# Avoid running this upstream-only maintenance task in forks.
	if: github.repository == 'jingw2/ontexus'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v5

	- uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Install matplotlib
	run: pip install matplotlib

	- name: Generate star history chart
	run: python scripts/gen_star_history.py --refresh
	env:
	# STAR_HISTORY_TOKEN（细粒度 PAT）如存在则优先，否则用内置 GITHUB_TOKEN，
	# 读取公开仓库的 stargazers 时间戳不需要额外权限。
	GITHUB_TOKEN: ${{ secrets.STAR_HISTORY_TOKEN \|\| secrets.GITHUB_TOKEN }}

	- name: Commit updated charts
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	git add assets/star-history-*.png
	git diff --cached --quiet && exit 0
	git commit -m "Update star history chart [skip ci]"
	git push