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] [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
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')
shell
The powerful shell function will help you to execute shell commands. You can use it with server.watch:
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
Here is a little hint on Django. Change your manage.py file to:
#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "hello.settings")
from django.core.management import execute_from_command_line
if 'livereload' in sys.argv:
from django.core.wsgi import get_wsgi_application
from livereload import Server
application = get_wsgi_application()
server = Server(application)
# Add your watch
# server.watch('path/to/file', 'your command')
server.serve()
else:
execute_from_command_line(sys.argv)
When you execute ./manage.py livereload, it will start a livereload server.
Flask
Wrap Flask with livereload is much simpler:
# app is a Flask object app = create_app() 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()
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