initial commit

_includes/media-url.html

@@ -0,0 +1,37 @@
+{%- comment -%}
+  Generate media resource final URL based on `site.cdn`, `page.media_subpath`
+
+  Arguments:
+    src - required, basic media resources path
+    subpath - optional, relative path of media resources
+    absolute - optional, boolean, if true, generate absolute URL
+
+  Return:
+    media resources URL
+{%- endcomment -%}
+
+{% assign url = include.src %}
+
+{%- if url -%}
+  {% unless url contains ':' %}
+    {%- comment -%} Add media resources subpath prefix {%- endcomment -%}
+    {% assign url = include.subpath | default: '' | append: '/' | append: url %}
+
+    {%- comment -%} Prepend CND URL {%- endcomment -%}
+    {% if site.cdn %}
+      {% assign url = site.cdn | append: '/' | append: url %}
+    {% endif %}
+
+    {% assign url = url | replace: '///', '/' | replace: '//', '/' | replace: ':/', '://' %}
+
+    {% unless url contains '://' %}
+      {% if include.absolute %}
+        {% assign url = site.url | append: site.baseurl | append: url %}
+      {% else %}
+        {% assign url = site.baseurl | append: url %}
+      {% endif %}
+    {% endunless %}
+  {% endunless %}
+{%- endif -%}
+
+{{- url -}}