use built in yarn command

Author: Danielle Adams

lib/yarn-2.sh

@@ -26,22 +26,8 @@ has_yarn_cache() {
 }
 
 has_yarn_workspace_plugin_installed() {
- local build_dir="$1"
- local plugin_paths=$(get_yarn_plugin_paths "$build_dir")
- local path
-
- if [[ -n $plugin_paths ]]; then
- path=$(echo "$plugin_paths" | grep plugin-workspace-tools)
- else
- path=""
- fi
-
- [[ ! "$path" == "" ]]
-}
-
-get_yarn_plugin_paths() {
- local build_dir="$1"
- $YQ r "$build_dir/.yarnrc.yml" "plugins.[*].path" 2>&1
+ local has_workspace_plugin=$(yarn plugin runtime | grep plugin-workspace-tools)
+ [[ ! "$has_workspace_plugin" == "" ]]
 }
 
 get_yarn_path() {