From ee9856628378cbf2fc9b79cb63171fb7212e720e Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Mon, 20 Nov 2023 11:55:40 -0800
Subject: [PATCH] In the page_css partial, check array length and presence of
 $.File before concatenating stylesheets

---
 layouts/partials/resources/page_css.html | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/layouts/partials/resources/page_css.html b/layouts/partials/resources/page_css.html
index 6bbd568..90adbea 100644
--- a/layouts/partials/resources/page_css.html
+++ b/layouts/partials/resources/page_css.html
@@ -15,10 +15,22 @@
 {{ range $stylesheets }}
   {{ $processedStylesheets = $processedStylesheets | append (. | resources.ExecuteAsTemplate .Name .) }}
 {{ end }}
+
 {{ if hugo.IsProduction }}
-  {{ $processedStylesheets = slice ($processedStylesheets
-                           | resources.Concat (printf "%s/page.css" $.File.Dir)
-                           | fingerprint "md5") }}
+  {{/*
+    Replace the list of stylesheets that helps with debugging with a
+    concatenated and fingerprinted version.
+  */}}
+  {{ if gt (len $processedStylesheets) 0 }}
+    {{ with $file := $.File }}
+      {{ $outputFilename := printf "%s/page.css" $.File.Dir }}
+      {{ $processedStylesheets = slice ($processedStylesheets
+                              | resources.Concat $outputFilename
+                              | fingerprint "md5") }}
+    {{ else }}
+      {{ warnf "No File for page CSS." }}
+    {{ end }}
+  {{ end }}
 {{ end }}
 
 {{ return $processedStylesheets }}