diff --git a/datasette/app.py b/datasette/app.py
index 7cd56cda..8312c10c 100644
--- a/datasette/app.py
+++ b/datasette/app.py
@@ -9,6 +9,7 @@ import sqlite3
from pathlib import Path
from concurrent import futures
import asyncio
+import os
import threading
import urllib.parse
import json
@@ -45,7 +46,11 @@ connections = threading.local()
class RenderMixin(HTTPMethodView):
def render(self, templates, **context):
return response.html(
- self.jinja_env.select_template(templates).render(**context)
+ self.jinja_env.select_template(templates).render({
+ **context, **{
+ 'app_css_hash': self.ds.app_css_hash(),
+ }
+ })
)
@@ -835,6 +840,13 @@ class Datasette:
self.template_dir = template_dir
self.static_mounts = static_mounts or []
+ def app_css_hash(self):
+ if not hasattr(self, '_app_css_hash'):
+ self._app_css_hash = hashlib.sha1(
+ open(os.path.join(app_root, 'datasette/static/app.css')).read().encode('utf8')
+ ).hexdigest()[:6]
+ return self._app_css_hash
+
def get_canned_query(self, database_name, query_name):
query = self.metadata.get(
'databases', {}
diff --git a/datasette/templates/base.html b/datasette/templates/base.html
index 0c21af0e..159d0f91 100644
--- a/datasette/templates/base.html
+++ b/datasette/templates/base.html
@@ -2,7 +2,7 @@
{% block title %}{% endblock %}
-
+
{% for url in extra_css_urls %}