Initial commit

export-indexes.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+usage() {
+  echo "Usage: $0 --uri <uri> --db <dbname> --output <file>"
+  echo ""
+  echo "  --uri     MongoDB connection URI (e.g. mongodb://user:pass@host:27017/admin)"
+  echo "  --db      Database name"
+  echo "  --output  Path to output JSON file"
+  exit 1
+}
+
+URI=""
+DB=""
+OUTPUT=""
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --uri)    URI="$2";    shift 2 ;;
+    --db)     DB="$2";     shift 2 ;;
+    --output) OUTPUT="$2"; shift 2 ;;
+    *) echo "Unknown argument: $1"; usage ;;
+  esac
+done
+
+[[ -z "$URI" ]]    && echo "Error: --uri is required"    && usage
+[[ -z "$DB" ]]     && echo "Error: --db is required"     && usage
+[[ -z "$OUTPUT" ]] && echo "Error: --output is required" && usage
+
+TMP_JS=$(mktemp /tmp/mongo-export-XXXXXX.js)
+trap 'rm -f "$TMP_JS"' EXIT
+
+cat > "$TMP_JS" <<'EOF'
+const dbName = process.env.MONGO_DB;
+const targetDb = db.getSiblingDB(dbName);
+
+const result = {};
+const collections = targetDb.getCollectionNames();
+
+for (const collName of collections) {
+  const indexes = targetDb.getCollection(collName).getIndexes();
+  const filtered = indexes.filter(idx => idx.name !== "_id_");
+
+  if (filtered.length > 0) {
+    result[collName] = filtered.map(idx => {
+      const { v, ns, ...rest } = idx;
+      return rest;
+    });
+  }
+}
+
+print(JSON.stringify(result, null, 2));
+EOF
+
+MONGO_DB="$DB" mongosh --quiet "$URI" --file "$TMP_JS" > "$OUTPUT"
+
+echo "Exported indexes to: $OUTPUT"