release-badge.yml

name: Release Badge

on:
  release:
    types: [published, edited, prereleased]
  push:
    tags:
      - 'v*'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  make-badge:
    runs-on: ubuntu-latest

    steps:
      - name: Check out default branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.repository.default_branch }}
          fetch-depth: 0

      - name: Determine version and label
        id: meta
        shell: bash
        run: |
          # Prefer the tag from a Release event
          if [ "${{ github.event_name }}" = "release" ]; then
            VERSION="${{ github.event.release.tag_name }}"
            if [ "${{ github.event.release.prerelease }}" = "true" ]; then
              LABEL="prerelease"
            else
              LABEL="release"
            fi
          else
            # Fallback for tag pushes / manual runs
            git fetch --tags --force --prune
            VERSION="$(git describe --tags --abbrev=0 2>/dev/null || echo 'v0.0.0')"
            LABEL="release"
          fi

          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "label=$LABEL"   >> $GITHUB_OUTPUT

      - name: Build SVG badge
        shell: bash
        run: |
          set -e
          mkdir -p Documentation/Images

          LABEL='${{ steps.meta.outputs.label }}'
          VERSION='${{ steps.meta.outputs.version }}'

          # Simple width calculation (keeps everything repo-local)
          label_chars=${#LABEL}
          vers_chars=${#VERSION}
          label_w=$(( label_chars * 6 + 20 ))   # ~6px per char + padding
          right_w=$(( vers_chars * 8 + 20 ))    # ~8px per char + padding
          [ $label_w -lt 60 ] && label_w=60
          [ $right_w -lt 80 ] && right_w=80
          total_w=$(( label_w + right_w ))
          lx=$(( label_w / 2 ))
          rx=$(( label_w + right_w / 2 ))

          cat > Documentation/Images/release.svg <<EOF
          <svg xmlns="http://www.w3.org/2000/svg" width="${total_w}" height="20" role="img" aria-label="${LABEL}: ${VERSION}">
            <linearGradient id="s" x2="0" y2="100%">
              <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
              <stop offset="1" stop-opacity=".1"/>
            </linearGradient>
            <mask id="m"><rect width="${total_w}" height="20" rx="3" fill="#fff"/></mask>
            <g mask="url(#m)">
              <rect width="${label_w}" height="20" fill="#555"/>
              <rect x="${label_w}" width="${right_w}" height="20" fill="#2ea44f"/>
              <rect width="${total_w}" height="20" fill="url(#s)"/>
            </g>
            <g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" font-size="11">
              <text x="${lx}" y="14">${LABEL}</text>
              <text x="${rx}" y="14">${VERSION}</text>
            </g>
          </svg>
          EOF

      - name: Commit badge
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          commit_message: "chore: update release badge -> ${{ steps.meta.outputs.version }}"
          file_pattern: Documentation/Images/release.svg