Fix common instance variable

pelicanconf.py

@@ -101,5 +101,8 @@ JINJA_FILTERS = {
 JINJA_ENVIRONMENT = {
     'trim_blocks': True,
     'lstrip_blocks': True,
-    'extensions': {}
+    'extensions': [
+        'jinja2.ext.with_',
+        'plugins.include_with.IncludeWith'
+    ]
 }

plugins/include_with.py

@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+"""
+    # Jinja-IncludeWith
+
+    A Jinja2 preprocessor extension that let you update the `include`
+    context like this:
+
+        {% include "something.html" with foo=bar %}
+        {% include "something.html" with a=3, b=2+2, c='yes' %}
+
+    You **must** also include 'jinja2.ext.with_' in the extensions list.
+
+    :copyright: [Juan-Pablo Scaletti] (http://jpscaletti.com).
+    :license: [MIT] (http://www.opensource.org/licenses/mit-license.php).
+
+    Copied from https://github.com/jpscaletti/jinja-includewith due to not pip-installable
+
+"""
+import re
+
+from jinja2.ext import Extension
+
+
+__version__ = '0.1'
+
+rx = re.compile(r'\{\%\s*include\s+(?P<tmpl>[^\s]+)\s+with\s+(?P<context>.*?)\s*\%\}',
+                re.IGNORECASE)
+
+
+class IncludeWith(Extension):
+
+    def preprocess(self, source, name, filename=None):
+        lastpos = 0
+        while 1:
+            m = rx.search(source, lastpos)
+            if not m:
+                break
+
+            lastpos = m.end()
+            d = m.groupdict()
+            context = d['context'].strip()
+            if context == 'context':
+                continue
+
+            source = ''.join([
+                source[:m.start()],
+                '{% with ', context, ' %}',
+                '{% include ', d['tmpl'].strip(), ' %}',
+                '{% endwith %}',
+                source[m.end():]
+            ])
+
+        return source

theme/templates/article.html

@@ -9,7 +9,7 @@
 {% endblock %}
 
 {% block content %}
-  {% include 'extras/header.html' with context %}
+  {% include 'extras/header.html' with instance=article %}
   <section>
     <div class="container">
       {{ article.content }}

theme/templates/blog.html

@@ -9,7 +9,7 @@
 {% endblock %}
 
 {% block content %}
-  {% include 'extras/header.html' with context %}
+  {% include 'extras/header.html' with instance=article %}
   <section>
     <div class="container">
       <p class="text-right small">

theme/templates/page.html

@@ -10,7 +10,7 @@
 
 {% block content %}
   {% if not page.no_container %}
-    {% include 'extras/header.html' with context %}
+    {% include 'extras/header.html' with instance=page %}
     <section>
       <div class="container">
         {{ page.content }}

theme/templates/projects.html

@@ -9,7 +9,7 @@
 {% endblock %}
 
 {% block content %}
-  {% include 'extras/header.html' with context %}
+  {% include 'extras/header.html' with instance=article %}
   <section>
     <div class="container">
       <p class="text-right small">