Add script to warmup og

package.json

@@ -20,6 +20,7 @@
     "best-practice-dirs": "node scripts/best-practice-dirs.cjs",
     "best-practice-content": "node scripts/best-practice-content.cjs",
     "generate:og": "node ./scripts/generate-og-images.mjs",
+    "warm:og": "sh ./scripts/warm-og.sh https://roadmap.sh/sitemap-0.xml",
     "compress:images": "tsx ./scripts/compress-images.ts",
     "test:e2e": "playwright test"
   },

scripts/warm-og.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+# Usage: warm-og.sh <sitemap-url>
+# Example: warm-og.sh https://www.example.com/sitemap.xml
+
+# Check if sitemap url is provided
+if [ -z "$1" ]; then
+  echo "Please provide sitemap URL" >&2
+  exit 1
+fi
+
+# Get all URLs from sitemap
+urls=$(curl -s "$1" | grep -o "<loc>[^<]*</loc>" | sed 's#<loc>\(.*\)</loc>#\1#')
+
+failed_urls=()
+
+# Warm up URLs
+for url in $urls; do
+  # Fetch the og:image URL from the meta tags
+  og_image_url=$(curl -s "$url" | grep -o "<meta property=\"og:image\" content=\"[^\"]*\"" | sed 's#<meta property="og:image" content="\([^"]*\)"#\1#')
+
+  # Warm up the og:image URL
+  if [ -n "$og_image_url" ]; then
+    echo "Warming up $og_image_url"
+    if ! curl -s -I "$og_image_url" > /dev/null; then
+      failed_urls+=("$og_image_url")
+    fi
+  else
+    echo "No og:image found for $url"
+  fi
+done
+
+# Print failed URLs
+if [ ${#failed_urls[@]} -gt 0 ]; then
+  echo "Failed to warm up the following URLs:" >&2
+  for failed_url in "${failed_urls[@]}"; do
+    echo "$failed_url" >&2
+  done
+fi