Convert breadcrumb.html include into a custom tag

wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html

@@ -8,7 +8,7 @@
 {% block content %}
 
     <header class="merged tab-merged nice-padding">
-        {% include "wagtailadmin/shared/breadcrumb.html" with page=parent_page include_self=1 %}
+        {% explorer_breadcrumb parent_page include_self=1 %}
 
         <div class="row row-flush">
             <div class="left col9">

wagtail/wagtailadmin/templates/wagtailadmin/pages/edit.html

@@ -8,7 +8,7 @@
 {% block content %}
     {% page_permissions page as page_perms %}
     <header class="merged tab-merged nice-padding">
-        {% include "wagtailadmin/shared/breadcrumb.html" with page=page %}
+        {% explorer_breadcrumb page %}
 
         <div class="row row-flush">
             <div class="left col9">

wagtail/wagtailadmin/templates/wagtailadmin/pages/index.html

@@ -7,7 +7,7 @@
     <header class="merged no-border nice-padding no-v-padding">
         <h1 class="visuallyhidden">Explorer</h1>
 
-        {% include "wagtailadmin/shared/breadcrumb.html" with page=parent_page %}
+        {% explorer_breadcrumb parent_page %}
     </header>
 
     <form id="page-reorder-form">

wagtail/wagtailadmin/templates/wagtailadmin/shared/breadcrumb.html

@@ -1,14 +1,11 @@
 {% load i18n %}
 
 <ul class="breadcrumb">
-    {% for page in page.get_ancestors %}
+    {% for page in pages %}
         {% if page.is_root %}
             <li class="home"><a href="{% url 'wagtailadmin_explore_root' %}" class="icon icon-home text-replace">{% trans 'Home' %}</a></li>
         {% else %}
             <li><a href="{% url 'wagtailadmin_explore' page.id %}">{{ page.get_admin_display_title }}</a></li>
         {% endif %}
     {% endfor %}
-    {% if include_self %}
-        <li><a href="{% url 'wagtailadmin_explore' page.id %}">{{ page.get_admin_display_title }}</a></li>
-    {% endif %}
 </ul>

wagtail/wagtailadmin/templatetags/wagtailadmin_tags.py

@@ -55,6 +55,13 @@ def main_nav(context):
     }
 
 
+@register.inclusion_tag('wagtailadmin/shared/breadcrumb.html')
+def explorer_breadcrumb(page, include_self=False):
+    return {
+        'pages': page.get_ancestors(inclusive=include_self)
+    }
+
+
 @register.inclusion_tag('wagtailadmin/shared/search_other.html', takes_context=True)
 def search_other(context, current=None):
     request = context['request']