add a check for the sage theme directory

private/scripts/helpers.sh

@@ -428,6 +428,14 @@ function update_composer() {
 
 # Finish up the Sage install process.
 function clean_up() {
+  # List the app/ehemes directory.
+  echo "${yellow}Listing the themes directory.${normal}"
+  # If the previous output did not include $sagename, bail.
+  if [[ ! "$(ls -la web/app/themes)" == *"$sagename"* ]]; then
+    echo "${red}Theme not found. Exiting here.${normal}"
+    exit 1;
+  fi
+
   # If the site is multisite, we'll need to enable the theme so we can activate it.
   terminus wp -- "$sitename"."$siteenv" theme enable "$sagename"
   # List the themes.