PgBiel

How I would improve NixOS (2024-08-22)

Hello! I'm Pg (GitHub: PgBiel). I wanted to share some thoughts about NixOS and Linux to the world - originally to the Gleam community, but this got a bit longer than I expected, so I made this Gist.

Normally this would be a blog post or similar, but I don't have a blog at the moment and I really wanted to write this down, so a Gist will do for now :)

I'll assume the reader is minimally familiar with concepts related to Linux distributions. You can learn more about NixOS here: https://nixos.org/

Observations

Everything below was tested with Godot 4.1.1, gdext at commit master@639aeb495f8f43fe68a326f6abe70a8ce4694ce3, Rust v1.72.0 (when using the stable channel), Rust v1.74.0-nightly (5ae769f06 2023-09-26, when using the nightly channel) and emsdk v3.1.28, in a Debian 12 podman container.

Setup: So far, to reach the furthest progress I could find in gdext WebAssembly export, it seems you need at least to:
1. Use the Emscripten flags --no-entry -sSIDE_MODULE=2 -sUSE_PTHREADS=1 (last one appears to be superseded by -pthread on recent versions);
  - To apply those flags, one can add to the env var RUSTFLAGS -C link-arg=emscripten-flag-here for each emscripten flag.
  - You can also avoid having to use RUSTFLAGS by adding the flags to project/rust/.cargo/config.toml in the format
```
[target.wasm32-unknown-emscripten]
rustflags = [
    "-Clink-arg=--no-entry",
```

	// MIT No Attribution
	//
	// Copyright (c) 2023 Pg Biel
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy of this
	// software and associated documentation files (the "Software"), to deal in the Software
	// without restriction, including without limitation the rights to use, copy, modify,
	// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
	// permit persons to whom the Software is furnished to do so.
	//

	// MIT No Attribution
	//
	// Copyright (c) 2023 Pg Biel
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy of this
	// software and associated documentation files (the "Software"), to deal in the Software
	// without restriction, including without limitation the rights to use, copy, modify,
	// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
	// permit persons to whom the Software is furnished to do so.
	//

	// MIT No Attribution
	//
	// Copyright (c) 2023 Pg Biel
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy of this
	// software and associated documentation files (the "Software"), to deal in the Software
	// without restriction, including without limitation the rights to use, copy, modify,
	// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
	// permit persons to whom the Software is furnished to do so.
	//

	from manimlib.imports import *
	import typing
	import itertools
	import collections


	def set_colors(obj: typing.Union[Mobject, Group, typing.Sequence], colors: typing.List[str]) -> object:
	for ind, color in zip(enumerate(obj), colors):
	obj[ind[0]].set_color(color)
	return object

	if (require.main !== module) throw new Error("Must not be require()d");
	const fs = require("fs");
	process.stdin.setEncoding("utf8");
	process.openStdin();
	const promisifyEvent = (emitter, event, handler, onOnce) => {
	return new Promise((res, rej) => {
	const newFunc = function() {
	const args = Array.from(arguments);
	res(handler.apply(handler, args));
	};