update-badges.yml

name: Update latest tag/release JSON

on:
  push:
    tags:
      - '*'              # any tag push updates latest_tag.json
  release:
    types: [published, edited]  # update latest_release.json when you publish/edit

permissions:
  contents: write

jobs:
  update:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout (full history for tag dates)
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Ensure jq available
        run: sudo apt-get update && sudo apt-get install -y jq

      - name: Compute latest tag by creation date
        id: tag
        shell: bash
        run: |
          mkdir -p .badges
          # newest tag by *creation date* (not semver)
          LATEST_TAG="$(git for-each-ref --sort=-creatordate --format='%(refname:strip=2)' refs/tags | head -n1)"
          echo "latest_tag=$LATEST_TAG" >> "$GITHUB_OUTPUT"

      - name: Write latest_tag.json
        run: |
          printf '{ "latest_tag": "%s" }\n' "${{ steps.tag.outputs.latest_tag }}" > .badges/latest_tag.json

      - name: Fetch latest published (non-prerelease) release
        id: rel
        env:
          REPO: ${{ github.repository }}
        run: |
          # GitHub's "latest" endpoint returns the most recent *non-prerelease* published release
          DATA="$(curl -sSfL https://api.github.com/repos/${REPO}/releases/latest)"
          TAG_NAME="$(echo "$DATA" | jq -r '.tag_name')"
          # Fallback if no releases yet
          if [ "$TAG_NAME" = "null" ] || [ -z "$TAG_NAME" ]; then TAG_NAME=""; fi
          echo "latest_release=$TAG_NAME" >> "$GITHUB_OUTPUT"

      - name: Write latest_release.json
        run: |
          printf '{ "latest_release": "%s" }\n' "${{ steps.rel.outputs.latest_release }}" > .badges/latest_release.json

      - name: Commit changes (if any)
        run: |
          if ! git diff --quiet -- .badges; then
            git config user.name  "github-actions[bot]"
            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
            git add .badges/latest_tag.json .badges/latest_release.json
            git commit -m "chore(badges): refresh latest_tag/release JSON"
            git push
          else
            echo "No badge JSON changes."
          fi