- Web Development with Django Cookbook(Second Edition)
- Aidas Bendoraitis
- 356字
- 2021-07-23 14:31:59
Setting up STATIC_URL dynamically for Git users
If you don't want to refresh the browser cache each time you change your CSS and JavaScript files, or while styling images, you need to set STATIC_URL
dynamically with a varying path component. With the dynamically changing URL, whenever the code is updated, the visitor's browser will force loading of all-new uncached static files. In this recipe, we will set a dynamic path for STATIC_URL
when you use the Git version control system.
Getting ready
Make sure that your project is under the Git version control and you have BASE_DIR
defined in your settings, as shown in the Defining relative paths in the settings recipe.
If you haven't done it yet, create the utils
module in your Django project. Also, create a misc.py
file there.
How to do it…
The procedure to put the Git timestamp in the STATIC_URL
setting consists of the following two steps:
- Add the following content to the
misc.py
file placed inutils/
:# utils/misc.py # -*- coding: UTF-8 -*- from __future__ import unicode_literals import subprocess from datetime import datetime def get_git_changeset(absolute_path): repo_dir = absolute_path git_show = subprocess.Popen( 'git show --pretty=format:%ct --quiet HEAD', stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, cwd=repo_dir, universal_newlines=True, ) timestamp = git_show.communicate()[0].partition('\n')[0] try: timestamp = \ datetime.utcfromtimestamp(int(timestamp)) except ValueError: return "" changeset = timestamp.strftime('%Y%m%d%H%M%S') return changeset
- Then, import the newly created
get_git_changeset()
function in the settings and use it for theSTATIC_URL
path, as follows:# settings.py # … somewhere after BASE_DIR definition … from utils.misc import get_git_changeset STATIC_URL = "/static/%s/" % get_git_changeset(BASE_DIR)
How it works…
The get_git_changeset()
function takes the absolute_path
directory as a parameter and calls the git
show shell command with the parameters to show the Unix timestamp of the HEAD
revision in the directory. As stated in the previous recipe, we pass BASE_DIR
to the function as we are sure that it is under version control. The timestamp is parsed; converted to a string consisting of year, month, day, hour, minutes, and seconds; returned; and included in the definition of STATIC_URL
.
See also
- The Setting up STATIC_URL dynamically for Subversion users recipe
- The Creating the Git ignore file recipe
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