Only do LaTeX parsing for the pages marked as LaTeX

app/latex.py

@@ -156,7 +156,12 @@ class LaTeXPreprocessor(markdown.preprocessors.Preprocessor):
 
     def run(self, lines):
         """Parses the actual page"""
-        # Re-creates the entire page so we can parse in a multine env.
+        # Checks for the LaTeX header
+        use_latex = any(line == '[//]: # (latex: 1)' for line in lines)
+        if not use_latex:
+            return lines
+
+        # Re-creates the entire page so we can parse in a multiline env.
         page = "\n".join(lines)
 
         # Adds a preamble mode

static/pages/Build-an-open-source-drone-with-a-Raspberry-Pi-and-Platypush.md

@@ -3,6 +3,7 @@
 [//]: # (image: /img/drone-schema.png)
 [//]: # (author: Fabio Manganiello <fabio@platypush.tech>)
 [//]: # (published: 2021-08-29)
+[//]: # (latex: 1)
 
 Drones are increasingly popular and affordable nowadays, and they have become a popular toy for kids and adults
 of all ages. If all you need is a flying camera to take your holiday selfies then an off-the-shelf solution may