fix: add package link check

Signed-off-by: Mohan Narayana <mohan.narayana@mailchimp.com>

bin/package-link

@@ -10,7 +10,6 @@ set -o pipefail # don't ignore exit codes when piping output
 set -o posix    # more strict failures in subshells
 # set -x          # enable debugging
 
-IFS="$(printf "\n\t")"
 # ---- End unofficial bash strict mode boilerplate
 
 package_name=$1
@@ -19,6 +18,20 @@ yalc_packages_file_name="yalc-packages"
 container_id="$(docker-compose ps -q web)"
 container_copied_packages_path="/home/node/copied-packages"
 
+# validate input
+IFS='/'
+read -a pkgarr <<< "$1"
+org_name=${pkgarr[0]}
+
+#check if the organization name is valid by cross referencing with node_modules
+is_package=$(find node_modules -type d -name $org_name)
+if [ -z "$is_package" ]; then
+  echo "$org_name does not exist"
+  exit 0
+fi
+
+IFS="$(printf "\n\t")"
+
 if [[ -z "${package_name}" ]]; then
   if ! [[ -f "$yalc_packages_file_name" ]]; then
     echo "Yalc packages file doesn't exist. Creating..."

bin/package-unlink

@@ -10,11 +10,24 @@ set -o pipefail # don't ignore exit codes when piping output
 set -o posix    # more strict failures in subshells
 # set -x          # enable debugging
 
-IFS="$(printf "\n\t")"
 # ---- End unofficial bash strict mode boilerplate
 
 package_name=$1
 
+# validate input
+IFS='/'
+read -a pkgarr <<< "$1"
+org_name=${pkgarr[0]}
+
+#check if the organization name is valid by cross referencing with node_modules
+is_package=$(find node_modules -type d -name $org_name)
+if [ -z "$is_package" ]; then
+  echo "$org_name does not exist"
+  exit 0
+fi
+
+IFS="$(printf "\n\t")"
+
 # Unlink the yalc dependency, remove the package drectory and npm install
 echo "Unlinking package from Example Storefront..."
 docker-compose exec web sh -c "cd /usr/local/src/app && yalc remove ${package_name}"