Management command for Flask + uWSGI , restarts uWSGI on file changes.

app.py

from flask import Flask

def configure_uwsgi(app):
    # Setup debugging, logging for uwsgi.
    try:
        import uwsgi
    except ImportError:
        return

    from time import strftime

    if app.debug:
        from werkzeug.debug import DebuggedApplication
        app.wsgi_app = DebuggedApplication(app.wsgi_app, True)

    @app.before_request
    def logging():
        uwsgi.set_logvar('iso_time', strftime('%Y-%m-%d %H:%M:%S'))


def create_app():
    '''
    App factory.
    '''
    app = Flask(__name__)
    
    configure_uwsgi(app)
    
    # do any other configuration
    return app

manage.py

from flask.ext.script import Manager
from app import create_app

manager = Manager(create_app)

@manager.command
def watch():
    import sys
    import subprocess
    from optimus.utils import bytes_fmt
    from watchdog.events import PatternMatchingEventHandler
    from watchdog.observers import Observer

    sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

    def colorize(line):
        try:
            date, time, method, uri, status, msecs, size = line.strip().split(' ')
            message = '\033[30m{0} {1} \033[32m{2} \033[30m{3} - {4}\033[0m\n'.format(method, uri, status, msecs, bytes_fmt(int(size.strip())))
        except ValueError:
            message = line

        return message

    class EventHandler(PatternMatchingEventHandler):
        def on_any_event(self, event):
            os.system('touch .reload')

    f = subprocess.Popen(['tail', '-F', 'logs/uwsgi-dev.log'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    event_handler = EventHandler(patterns=['*.py'])
    observer = Observer()
    observer.schedule(event_handler, path='.', recursive=True)
    observer.start()
    try:
        while True:
            sys.stdout.write(colorize(f.stdout.readline()))
    except KeyboardInterrupt, SystemExit:
        observer.stop()
    observer.join()

uwsgi.ini

[uwsgi]
; path to file which will be used to trigger reload
touch-reload = /dir/to/your/app/.reload

; I add a custom iso_time specifier for nicer log output
log-format = %(iso_time) %(method) %(uri) %(status) %(msecs)ms %(size)

; And log some place where we can tail it
logto = /dir/to/your/app/log/uwsgi.log