name: Star History

# Regenerates the README star-history chart from the repo's own stargazer timeline
# and publishes it to the unprotected `star-history` branch, which the README embeds
# by raw URL. GitHub restricted the public stargazers API to a repo's own
# admins/collaborators (June 2026), which broke the hosted api.star-history.com badge.
# Running here with the default GITHUB_TOKEN reads our own stars, so there's no
# third-party service and no rate-limited shared token pool. See scripts/generate-star-history.mjs.

on:
  schedule:
    - cron: "23 7 * * 1" # Mondays 07:23 UTC
  workflow_dispatch:

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

permissions:
  contents: write

jobs:
  refresh:
    name: Refresh chart
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
        with:
          node-version: 22

      - name: Generate chart
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          STAR_HISTORY_REPO: ${{ github.repository }}
          STAR_HISTORY_OUT: ${{ runner.temp }}/star-history.svg
        run: node scripts/generate-star-history.mjs

      - name: Publish to star-history branch
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail
          work="$(mktemp -d)"
          cp "${{ runner.temp }}/star-history.svg" "$work/star-history.svg"
          cd "$work"
          git init -q
          git checkout -q -b star-history
          git add star-history.svg
          git -c user.name="SnapOtter" -c user.email="snapotter.hq@gmail.com" \
            commit -q -m "chore: refresh star history chart [skip ci]"
          git push -q --force \
            "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" \
            HEAD:star-history