From 8a9c0239b65be52f064526b273968c4e2969b758 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sat, 2 Oct 2021 17:33:43 +0300
Subject: custom_{css,js}: support absolute URLs

---
 README.md                    | 2 +-
 _includes/common/footer.html | 8 +++++++-
 _includes/common/header.html | 8 +++++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index d91d85d..2525072 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,7 @@ See [this post][mathjax post] for a usage example.
 Include custom CSS stylesheets in the header & custom JavaScript files in the
 footer by specifying the `page.custom_css` and `page.custom_js` arrays.
 They will be picked up from the root "assets/css" and "assets/js" directories
-respectively.
+respectively (unless the URL is absolute).
 
 History
 -------
diff --git a/_includes/common/footer.html b/_includes/common/footer.html
index 0e2aecf..0d7a2a0 100644
--- a/_includes/common/footer.html
+++ b/_includes/common/footer.html
@@ -23,7 +23,13 @@
     <script src="{{ '/assets/bootstrap/js/bootstrap.min.js' | relative_url }}"></script>
     {% if page.custom_js %}
       {% for js in page.custom_js %}
-        <script src="{{ '/assets/js/' | relative_url }}{{ js }}"></script>
+        {% assign abs_check = js | downcase | split: '//' %}
+        {% if abs_check[0] == 'http:' or abs_check[0] == 'https:' or abs_check[0] == blank %}
+          {% assign url = js %}
+        {% else %}
+          {% assign url = '/assets/js/' | relative_url | append: js %}
+        {% endif %}
+        <script src="{{ url }}"></script>
       {% endfor %}
     {% endif %}
   </body>
diff --git a/_includes/common/header.html b/_includes/common/header.html
index 464e42a..f905e37 100644
--- a/_includes/common/header.html
+++ b/_includes/common/header.html
@@ -23,7 +23,13 @@
 
     {% if page.custom_css %}
       {% for css in page.custom_css %}
-        <link rel="stylesheet" href="{{ '/assets/css/' | relative_url }}{{ css }}">
+        {% assign abs_check = css | downcase | split: '//' %}
+        {% if abs_check[0] == 'http:' or abs_check[0] == 'https:' or abs_check[0] == blank %}
+          {% assign url = css %}
+        {% else %}
+          {% assign url = '/assets/css/' | relative_url | append: css %}
+        {% endif %}
+        <link rel="stylesheet" href="{{ url }}">
       {% endfor %}
     {% endif %}
   </head>
-- 
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