helm: don't break on missing components

I have WIP stuff that goes uncommitted frequently enough that I think this is better than keeping the list accurate. Probably wouldn't feel that was in a multi-user environment

helm/render-all.sh

@@ -7,6 +7,12 @@ header="# DO NOT EDIT: This file has been automatically generated by the script
 render_helm() {
     target="${1}"
     component="${2}"
+
+    if [ ! -d "${component}" ]; then
+        echo "skipping non-existant component ${component}"
+        return
+    fi
+
     mkdir -p "${target}/${component}"
     echo "${header}" > "${target}/${component}/bundle.yaml"
     rm -rf "${component}/charts" # it doesn't seem to update them otherwise