From d499a9ae0b64a922a96eedc54583cc1353e3e8a8 Mon Sep 17 00:00:00 2001
From: Will Faught <willfaught@users.noreply.github.com>
Date: Sat, 23 Sep 2023 17:23:10 -0700
Subject: [PATCH] Filter for valid rel values

---
 layouts/_default/list.atom.xml | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/layouts/_default/list.atom.xml b/layouts/_default/list.atom.xml
index 308002fb..4825f1fa 100644
--- a/layouts/_default/list.atom.xml
+++ b/layouts/_default/list.atom.xml
@@ -72,12 +72,16 @@
     {{ range $page.OutputFormats }}
         {{ $rel := cond (eq .Permalink $page.Permalink) "self" .Rel }}
 
-        {{ printf `<link href="%s" rel="%s" type="%s"/>` .Permalink $rel .MediaType | safeHTML }}
+        {{ if or (eq $rel "alternate") (eq $rel "enclosure") (eq $rel "related") (eq $rel "self") (eq $rel "via") }}
+            {{ printf `<link href="%s" rel="%s" type="%s"/>` .Permalink $rel .MediaType | safeHTML }}
+        {{ end }}
     {{ end }}
 
     {{ range $t := $page.Translations }}
         {{ range .OutputFormats }}
-            {{ printf `<link href="%s" hreflang="%s" rel="%s" type="%s"/>` .Permalink $t.Lang .Rel .MediaType | safeHTML }}
+            {{ if or (eq .Rel "alternate") (eq .Rel "enclosure") (eq .Rel "related") (eq .Rel "self") (eq .Rel "via") }}
+                {{ printf `<link href="%s" hreflang="%s" rel="%s" type="%s"/>` .Permalink $t.Lang .Rel .MediaType | safeHTML }}
+            {{ end }}
         {{ end }}
     {{ end }}
 
@@ -165,12 +169,16 @@
             {{ range $page.OutputFormats }}
                 {{ $rel := cond (eq .Permalink $page.Permalink) "self" .Rel }}
 
-                {{ printf `<link href="%s" rel="%s" type="%s"/>` .Permalink $rel .MediaType | safeHTML }}
+                {{ if or (eq $rel "alternate") (eq $rel "enclosure") (eq $rel "related") (eq $rel "self") (eq $rel "via") }}
+                    {{ printf `<link href="%s" rel="%s" type="%s"/>` .Permalink $rel .MediaType | safeHTML }}
+                {{ end }}
             {{ end }}
 
             {{ range $t := $page.Translations }}
                 {{ range .OutputFormats }}
-                    {{ printf `<link href="%s" hreflang="%s" rel="%s" type="%s"/>` .Permalink $t.Lang .Rel .MediaType | safeHTML }}
+                    {{ if or (eq .Rel "alternate") (eq .Rel "enclosure") (eq .Rel "related") (eq .Rel "self") (eq .Rel "via") }}
+                        {{ printf `<link href="%s" hreflang="%s" rel="%s" type="%s"/>` .Permalink $t.Lang .Rel .MediaType | safeHTML }}
+                    {{ end }}
                 {{ end }}
             {{ end }}