Hot reloading

[pbrissaud]

Hi,

I was wondering if this cool library can perform hot reloading to update config in live if the file changed.

Eg:

main.py

import confuse
import sys
import time

if __name__ == "__main__":
  config = confuse.Configuration('app', __name__)
  print(config)
  time.sleep(20)
  print(config)
  sys.exit(0)

~/.config/app/config.yaml

foo: bar

I launch the program, then I modify the config.yaml file to

foo: bar
test: hello world

Program output:

$ python3 main.py
{'foo': 'bar'}  # I change the config.yaml file after this output
{'foo': 'bar'}  # Sould be {'foo': 'bar', 'test': 'hello world'}
# Relaunching program to be sure 
% python3 main.py
{'foo': 'bar', 'test': 'hello world'}
{'foo': 'bar', 'test': 'hello world'}

Thanks

[sampsyo]

Yo! We don't have anything that automatically watches for on-disk file changes (that's a little complicated to do in a cross-platform way), but you can consider manually reloading sources when stuff might have changed. Something like this (not that I've tested it):

for source in config.sources:
    if isinstance(source, confuse.sources.YamlSource):
        source.load()

[pbrissaud]

Thanks for your quick answer, I will look to your solution !

[pbrissaud]

Your solution works like a charm, a big thanks ! Any plans to integrate this as a builtin method in the library (eg: config.reload()) ?

[sampsyo]

I certainly have no objection to adding such a thing! Would you be interested in opening a pull request?

[pbrissaud]

Yeah of course !