[CI] Add node comparison badge (#99)

* [CI] Add node comparison badge

* Add/Update badge

---------

Co-authored-by: GitHub Action <action@github.com>

.github/workflows/node-badge.yml

@@ -0,0 +1,70 @@
+# Based on: https://github.com/emibcn/badge-action/blob/master/.github/workflows/test.yml
+name: "Generate node comparison badge"
+
+on:
+  push:
+    paths:
+      - "src/games/definitions.rs"
+      - ".github/workflows/node-badge.yml"
+  schedule:
+    - cron: '0 0 * * 1' # Update once a week in case node-gamedig has changed
+  workflow_dispatch:
+
+jobs:
+  badge:
+    runs-on: "ubuntu-latest"
+    name: Create node comparison badge
+    env:
+      BADGE_PATH: ".github/badges/node.svg"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
+        with:
+          repository: "gamedig/node-gamedig"
+          sparse-checkout: "games.txt"
+          path: "node-gamedig"
+
+      - name: Calculate comparison
+        id: comparison
+        run: |
+          # Find list of node games
+          node_games=$(awk -F "|" '/^[^#]/ {if(length($1) > 0) print $1 }' ./node-gamedig/games.txt)
+          node_games_count=$(printf "%s\n" "$node_games" | wc -l)
+
+          # Calculate how many of those games we have definitions for
+          rust_games_count=0
+          for game in $node_games; do
+            if grep "\"$game\" *=>" ./src/games/definitions.rs; then
+              rust_games_count=$(( rust_games_count + 1 ))
+            fi
+          done
+
+          # Calculate percent
+          percent=$(( rust_games_count * 100 / node_games_count))
+
+          echo "$rust_games_count/$node_games_count $percent%"
+          # Output percentage
+          echo "percent=$percent" >> "${GITHUB_OUTPUT}"
+
+      - name: Generate the badge SVG image
+        uses: emibcn/badge-action@v2.0.2
+        id: badge
+        with:
+          label: "Node game coverage"
+          status: "${{ steps.comparison.outputs.percent }}%"
+          color: "0f80c1"
+          path: ${{ env.BADGE_PATH }}
+
+      - name: "Commit badge"
+        continue-on-error: true
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add "${BADGE_PATH}"
+          git commit -m "Add/Update badge"
+
+      - name: Push badge commit
+        uses: ad-m/github-push-action@master
+        if: ${{ success() }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}