Python LiveReload is an awesome tool for web developers
Project description
This is a brand new LiveReload in version 2.0.0.
Installation
Python LiveReload is designed for web developers who know Python.
Install Python LiveReload with pip:
$ pip install livereload
If you don’t have pip installed, try easy_install:
$ easy_install livereload
Command Line Interface
Python LiveReload provides a command line utility, livereload, for starting a server in a directory.
By default, it will listen to port 35729, the common port for LiveReload browser extensions.
$ livereload --help usage: livereload [-h] [-p PORT] [-w WAIT] [directory] Start a `livereload` server positional arguments: directory Directory to watch for changes optional arguments: -h, --help show this help message and exit -p PORT, --port PORT Port to run `livereload` server on -w WAIT, --wait WAIT Time delay before reloading
Older versions of Python LiveReload used a Guardfile to describe optional additional rules for files to watch and build commands to run on changes. This conflicted with other tools that used the same file for their configuration and is no longer supported since Python LiveReload version 2.0.0. Instead of a Guardfile you can now write a Python script using very similar syntax and run it instead of the command line application.
Script example: Sphinx
Here’s a simple example script that rebuilds Sphinx documentation:
#!/usr/bin/env python
from livereload import Server, shell
server = Server()
server.watch('docs/*.rst', shell('make html', cwd='docs'))
server.serve(root='docs/_build/html')Run it, then open http://localhost:5500/ and you can see the documentation changes in real time.
Developer Guide
The new livereload server is designed for developers. It can power a wsgi application now:
from livereload import Server, shell
server = Server(wsgi_app)
# run a shell command
server.watch('static/*.stylus', 'make static')
# run a function
def alert():
print('foo')
server.watch('foo.txt', alert)
# output stdout into a file
server.watch('style.less', shell('lessc style.less', output='style.css'))
server.serve()The Server class accepts parameters:
app: a wsgi application
watcher: a watcher instance, you don’t have to create one
server.watch
server.watch can watch a filepath, a directory and a glob pattern:
server.watch('path/to/file.txt')
server.watch('directory/path/')
server.watch('glob/*.pattern')
You can also use other library (for example: formic) for more powerful file adding:
for filepath in formic.FileSet(include="**.css"):
server.watch(filepath, 'make css')
You can delay a certain seconds to send the reload signal:
# delay 2 seconds for reloading
server.watch('path/to/file', delay=2)
server.serve
Setup a server with server.serve method. It can create a static server and a livereload server:
# use default settings server.serve() # livereload on another port server.serve(liveport=35729) # use custom host and port server.serve(port=8080, host='localhost') # open the web browser on startup server.serve(open_url=True, debug=False)
shell
The powerful shell function will help you to execute shell commands. You can use it with server.watch:
# you can redirect command output to a file
server.watch('style.less', shell('lessc style.less', output='style.css'))
# commands can be a list
server.watch('style.less', shell(['lessc', 'style.less'], output='style.css'))
# working with Makefile
server.watch('assets/*.styl', shell('make assets', cwd='assets'))
Frameworks Integration
Livereload can work seamlessly with your favorite framework.
Django
For Django there is a management command included.
To use simply
add 'livereload' to your INSTALLED_APPS and
then run ./manage.py livereload.
For available options like host and ports please refer to ./manage.py livereload -h.
To automagically serve static files like the native runserver command you have to use dj-static. (follow the simple instructions there).
Flask
Wrap Flask with livereload is much simpler:
# app is a Flask object
app = create_app()
# remember to use DEBUG mode for templates auto reload
# https://github.com/lepture/python-livereload/issues/144
app.debug = True
server = Server(app.wsgi_app)
# server.watch
server.serve()Bottle
Wrap the Bottle app with livereload server:
app = Bottle()
server = Server(app)
# server.watch
server.serve()Release history Release notifications | RSS feed
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