chore(site): ensure sitemap entries have a lastmod

Author: JamieMason

site/scripts/patch-sitemap.sh

@@ -1,4 +1,19 @@
 #!/usr/bin/env bash
 
+# Remove the sitemap index file (we only have one sitemap)
 rm dist/sitemap-index.xml
 mv dist/sitemap-0.xml dist/sitemap.xml
+
+# Add lastmod dates to sitemap entries
+# Use current date as lastmod for all entries since we don't track per-page dates
+CURRENT_DATE=$(date -u +"%Y-%m-%d")
+
+# Use sed to add <lastmod> after each <loc> tag
+# This works on both macOS and Linux
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  # macOS
+  sed -i '' "s|</loc>|</loc><lastmod>${CURRENT_DATE}</lastmod>|g" dist/sitemap.xml
+else
+  # Linux
+  sed -i "s|</loc>|</loc><lastmod>${CURRENT_DATE}</lastmod>|g" dist/sitemap.xml
+fi