Add util for finding page

hooks/nav.py

@@ -1,3 +1,5 @@
+import jinja2
+
 def is_list_page(page) -> bool:
     if not page.parent:
         return False
@@ -9,6 +11,15 @@ def children(page):
         return []
     return page.parent.children[1:]
 
+@jinja2.pass_context
+def get_page(context, slug):
+    nav = context["nav"]
+    for page in nav.pages:
+        if page.file.src_uri == slug:
+            return page
+    return None
+
 def on_env(env, config, files):
     env.filters["is_list_page"] = is_list_page
     env.filters["children"] = children
+    env.globals["get_page"] = get_page

theme/main.html

@@ -8,3 +8,7 @@ Section: {{ page.is_section }}
 Is lits page: {{ page|is_list_page }}
 
 Children: {{ page|children }}
+
+{% set tag_1_page = get_page('tags/tag1.md') %}
+
+Found page: {{ tag_1_page }}