feat : coding#42 check package name should not have version

lint.sh

@@ -26,11 +26,13 @@ if [ -n "$index_file" ]; then
     diff index-body.md index-body-sorted.md
 fi
 
-package_name=$(awk '{print $1}' /tmp/index-body.md)
-echo "check if package name have version number"
-for i in $package_name; do
-    expr "$i" : ".*\.[0-9]\+\." > /dev/null && echo "[ERROR] $i : package name should not have version!" && exit 2
-done
+if [ -n "$index_file" ]; then
+    package_name=$(awk '{print $1}' /tmp/index-body.md)
+    echo "check if package name have version number"
+    for i in $package_name; do
+        expr "$i" : ".*\.[0-9]\+\." > /dev/null && echo "[ERROR] $i : package name should not have version!" && exit 2
+    done
+fi
 
 ## lint markdown
 # TODO