From a8074ab7f6087a387f0a96cdb4dccda0ccf88036 Mon Sep 17 00:00:00 2001
From: Otto Winter <otto@otto-winter.com>
Date: Tue, 5 Mar 2019 20:33:51 +0100
Subject: [PATCH] Hash custom.css version

---
 _templates/layout.html | 2 +-
 conf.py                | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/_templates/layout.html b/_templates/layout.html
index 6b1bc0373..cd47a88c2 100644
--- a/_templates/layout.html
+++ b/_templates/layout.html
@@ -5,7 +5,7 @@
 {% endblock %}
 
 {%- block extrahead %}
-  <link rel="stylesheet" href="{{ pathto('_static/custom.css', 1) }}" type="text/css" />
+  <link rel="stylesheet" href="{{ pathto('_static/custom.css', 1) }}?hash={{ custom_css_hash }}" type="text/css" />
   <link rel="apple-touch-icon" sizes="180x180" href="/_static/apple-touch-icon.png">
   <link rel="shortcut icon" href="/_static/favicon.ico">
   <link rel="icon" type="image/png" sizes="512x512" href="/_static/favicon-512x512.png">
diff --git a/conf.py b/conf.py
index b893a1f6e..bb2d56556 100644
--- a/conf.py
+++ b/conf.py
@@ -113,6 +113,9 @@ html_theme = 'alabaster'
 # documentation.
 #
 html_baseurl = os.getenv('BASE_URL', 'https://esphome.io')
+with open('_static/custom.css', 'rb') as f:
+    custom_css_hash = "{:08X}".format(hash(f.read()) % 2**32)
+
 html_theme_options = {
     # 'logo': 'logo-full.png',
     'logo_name': False,
@@ -122,6 +125,10 @@ html_theme_options = {
     'show_powered_by': False,
 }
 
+html_context = {
+    'custom_css_hash': custom_css_hash,
+}
+
 html_logo = 'images/logo-text.svg'
 html_copy_source = True
 html_show_sourcelink = False