autoreload

autoreload.py

#!/usr/bin/env python
import os
import sys
import subprocess
import time


# How often we check the filesystem for changes (in seconds)
wait = 1
command = ' '.join(sys.argv[1:])
path = '.'
process = subprocess.Popen(command, shell=True)
last_mtime = max(file_times(path))


def file_filter(name):
    return (not name.startswith(".")) and (not name.endswith(".swp"))

def file_times(path):
    for top_level in filter(file_filter, os.listdir(path)):
        for root, dirs, files in os.walk(top_level):
            for file in filter(file_filter, files):
                yield os.stat(os.path.join(root, file)).st_mtime

def print_stdout(process):
    stdout = process.stdout
    if stdout != None:
        print(stdout)

while True:
    max_mtime = max(file_times(path))
    print_stdout(process)
    if max_mtime > last_mtime:
        last_mtime = max_mtime
        print('Restarting process.')
        process.kill()
        process = subprocess.Popen(command, shell=True)
    time.sleep(wait)