#32534: Allow using StatReloader even if watchman is available
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Reporter: Evgeny Arshinov | Owner: nobody
Type: New feature | Status: new
Component: Utilities | Version: dev
Severity: Normal | Keywords: reload
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Hi,
Currently if Django discovers a compatible version of `watchman`, it
unconditionally used WatchmanReloader instead of StatReloader. There is
reason to do that because normally WatchmanReloader performs just as
reliably as StatReloader while being more efficient. However, in my setup,
which is WSL 2 + Docker with project dir mounted from Windows filesystem,
watchman simply doesn't work because of non-functioning inotify. This lack
of inotify support on WSL's part isn't clearly documented, but there are
two issues WSL project members usually reference:
- https://github.com/microsoft/WSL/issues/4064
- https://github.com/microsoft/WSL/issues/4739
WSL people strongly recommend placing files to be mounted into Docker on
the WSL filesystem (rather than Windows filesystem), but I have to keep
them in Windows filesystem due to other issues in my development
infrastructure. Not all of our development team members have to do that,
so I can't exclude watchman from our development Docker image altogether
which would ruin the autoreload experience for others.
What I suggest is an environment variable like `DJANGO_WATCHMAN_ENABLE(D)`
/ `DJANGO_WATCHMAN_DISABLE(D)` which would allow me to turn off watchman
support without altering the Docker image.
References:
- Watchman support in django.utils.autoreload:
https://code.djangoproject.com/ticket/27685
- [https://docs.djangoproject.com/en/3.1/ref/django-admin/#envvar-
DJANGO_WATCHMAN_TIMEOUT DJANGO_WATCHMAN_TIMEOUT] - an existing watchman
configuration option to be defined as an env var
--
Ticket URL: <https://code.djangoproject.com/ticket/32534>
Django <https://code.djangoproject.com/>
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