Christoph Bülter cb109

Based on Scenario 2 from: https://simpleisbetterthancomplex.com/tutorial/2016/07/26/how-to-reset-migrations.html

Note: This is different to squashing migrations and a potential destructive operation if done wrong!

Preparation

On your local development machine, with the current database schema:

Prepare a git branch

Run some command that initializes your codebase, e.g. for a Django project do:

time python -X importtime manage.py --version 2> importtimes.txt

Visualize and analyse contents of importtimes.txt with: https://kmichel.github.io/python-importtime-graph/

Defer imports by moving them inside functions/methods. With Python 3.15+ we will also be able to mark imports as lazy like lazy import xyz within the top level module scope, neat.

With deferring the largest/slowest few imports the startup time for any python commands can easily be halved or more, making everything noticeably faster!

Location for in game save files on Onion OS:

/mnt/SDCARD/Saves/CurrentProfile/saves/Gambatte/Mystic Quest (Europe).srm

Location for in game save files on DrUm78's Funkey OS:

/mnt/Funkey/.picoarch/data/gambatte/Mystic Quest (Europe).sav

Despite the different file extensions, these files are interchangeable. You can copy from one location to another and rename the file extension for the system (e.g. with Dingux Commander) and the emulator/game should detect it

When receiving AJAX responses that contain Set-Cookie headers from a different origin/domain, by default these headers conflict with the browser's same origin policy and are rejected/not set. We must specify withCredentials: true or similar flags on the request to allow for this (e.g. to receive a CSRF token as a cookie that we can then read back and attach to each POST request):

XMLHttpRequest
- withCredentials: true
- https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/withCredentials
axios
- withCredentials: true
- https://flaviocopes.com/axios-credentials/
fetch
credentials: 'include'

	[Unit]
	Description=Chrome Browser Worker
	After=network.target

	[Service]
	Environment=PYTHONUNBUFFERED=1
	Environment=DJANGO_DEPLOYMENT_TYPE=prod
	User=www-data
	Group=www-data
	WorkingDirectory=/opt/myproject

	import os


	def e2e_my_test(db):
	"""We assume this fixture is run before launching the cypress spec using the same name."""
	my_object = ...
	# Note: We may have to make this URL relative or replace its domain
	# with live_server.url to avoid running into same-origin constraints
	# in the browser. Though cypress v12 upwards is fine with that!
	os.environ["MY_DYNAMIC_URL"] = my_object.url

	# Explicitly set Access-Control-Allow-Origin header for certain
	# responses and domains that ask for files. This helps e.g. with test
	# setups on the development machine and an accompanying smartphone
	# (assuming we point it to the machine's IP in local network, 10.33.1.XX
	# here), as well as production setups that involve several domains.
	#
	server {
	...

	# django-filer has unchanging canonical URLs for any uploaded files,

	mount c ~/dosgames
	imgmount d "~/dosgames/conqstND/cd/Conquest.cue" -t iso -fs iso
	c:
	cd CONQSTND
	cnwmain.exe -usecd

	#!/bin/bash

	# In this example we want to execute 'git pull' on the local 'master' branch, but we
	# want to make sure that pull won't introduce conflicts and by that a broken checkout.
	# The script below will do an in-memory merge of the upstream master and local master
	# and exit with a non-zero code if that merge produced any conflicts.
	#
	# A snippet like this is useful for deployment scripts that involve 'git pull' to
	# prevent breaking production if for some reason a conflict has bypassed CI.
	#