update-badge.yml

name: Sync Good First Issues Badge

on:
  issues:
    types: [opened, closed, labeled, unlabeled, reopened]
  workflow_dispatch:

permissions:
  contents: write

jobs:
  update-badge:
    name: Update README badge
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Count open "good first issue" issues and update badge
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # ── 1. Count live open "good first issue" issues ─────────────────
          COUNT=$(gh issue list \
            --repo "${{ github.repository }}" \
            --label "good first issue" \
            --state open \
            --limit 500 \
            --json number \
            --jq 'length')

          echo "Open good first issues: $COUNT"

          # ── 2. Read current badge count from README ───────────────────────
          CURRENT=$(grep -oE 'Good%20First%20Issues-[0-9]+%20Open' README.md \
            | grep -oE '[0-9]+' | head -1 || echo "0")

          echo "Current badge count: $CURRENT"

          # ── 3. Skip if already up-to-date ────────────────────────────────
          if [[ "$CURRENT" == "$COUNT" ]]; then
            echo "Badge already shows $COUNT — nothing to do."
            exit 0
          fi

          # ── 4. Update the badge in README.md ─────────────────────────────
          sed -i \
            "s|Good%20First%20Issues-[0-9]*%20Open|Good%20First%20Issues-${COUNT}%20Open|g" \
            README.md

          echo "Badge updated: $CURRENT → $COUNT"

      - name: Commit and push if README changed
        run: |
          if git diff --quiet README.md; then
            echo "No changes — skipping commit."
            exit 0
          fi

          git config user.name  "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          git add README.md
          git commit -m "chore: sync Good First Issues badge [skip ci]"
          git push