From a31925cea06c06362682ad5e7323b15f229dcfab Mon Sep 17 00:00:00 2001
From: Gabriel Birke <gabriel.birke@gmail.com>
Date: Sun, 18 Mar 2018 22:24:43 +0100
Subject: [PATCH] Allow external JS and CSS to be included

Allow params.custom_css and params.custom_js to contain HTTP and HTTPS
URLs.
---
 README.md                  |  6 +++---
 layouts/partials/head.html | 12 ++++++++++--
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index a6087ead..f6959c81 100644
--- a/README.md
+++ b/README.md
@@ -187,18 +187,18 @@ paginate = 10
   url = "/about/"
 ```
 
-* Override the theme by linking to custom CSS files:
+* Override the theme by linking to custom CSS files or URLs:
 
 ```toml
 [params]
   custom_css = ["css/my.css"]
 ```
 
-* Add new behaviours by linking to custom JS files:
+* Add new behaviours by linking to custom JS files or URLs:
 
 ```toml
 [params]
-  custom_js = ["js/my.js"]
+  custom_js = ["js/my.js", "https://cdnjs.cloudflare.com/ajax/libs/zooming/1.4.2/zooming.min.js"]
 ```
 
 ## Shortcodes
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index f503bfb8..f31a14b9 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -52,10 +52,18 @@
   {{ partial "favicon.html" . }}
 
   {{ range .Site.Params.custom_css }}
-    <link rel="stylesheet" href="{{ $.Site.BaseURL }}{{ . }}">
+    {{ if findRE "https?://" . }}
+        <link rel="stylesheet" href="{{ . }}">
+    {{ else }}
+        <link rel="stylesheet" href="{{ $.Site.BaseURL }}{{ . }}">
+    {{ end }}
   {{ end }}
   {{ range .Site.Params.custom_js }}
-    <script src="{{ $.Site.BaseURL }}{{ . }}"></script>
+    {{ if findRE "https?://" . }}
+        <script src="{{ . }}"></script>
+    {{ else }}
+        <script src="{{ $.Site.BaseURL }}{{ . }}"></script>
+    {{ end }}
   {{ end }}
 
 </head>