Nixt - super basic Nix flake templates

If you want to use Nix in an existing project, or just get a basic project going from scratch without any decisions being made on your behalf, these templates are for you.

There's no magic, just a flake.nix and .envrc for direnv integration.

This allows you to automatically install and lock the dependencies of your project that you can't specify in your existing package manager, — like the package manager itself, external tools like awk or gnused, or even tools from other language ecosystems — without changing anything else about how your project is built or deployed.

Getting started

Make sure you have Nix (and optionally direnv) installed and the experimental features flakes and nix-command enabled. (TODO: add instructions for newcomers)

Add a template to your existing repository (where <template> is the name of the template):

nix flake init -t github:iFreilicht/nixt#<template>

You will then see a helpful message that guides you through the next steps.

When creating a new project from scratch, check Docs for each template to see specific instructions.

Philosophy

Your (and your fellow contributors') first contact with Nix should be fun and enriching. These templates are optimised for the usecase of adding Nix to an existing project in node, python or another language that already has its own package managers. Therefore, these templates only contain a flake.nix and an .envrc file and only define a devShell output that gives you a reproducible development environment you can enter automatically with direnv or manually with nix develop.

While Nix can also be used as a tool for building, containerizing or distributing your project and can even replace your language-specific package manager completely, these are advanced usecases that you can discover later in your journey with Nix.

This means that, after adding the template of your choosing from this repo to your project with the instructions above:

all external dependencies of your project can be locked and installed automatically
the version of your package manager itself is locked, too (similar to asdf-vm)
the build and deployment process of your project does not change at all

Onboarding journey

To support newcomers as well as possible with their first steps, all templates in this repository have the following onboarding journey:

Check the README of the template that fits your use-case
Run the specified commands until you reach nix flake init -t github:iFreilicht/nixt#<template>
This will display a helpful message to guide you through the next steps:
You just added Nix to your project!

Next steps:
1. If you're in a git repository:
  - Add .direnv to your .gitignore file
  - Run git add flake.nix, otherwise the next step will fail!
2. Decide whether you want to use direnv or not and then either:
  - run direnv allow to always enable the environment when you enter the project directory
  - run nix develop to enable the environment manually
3. Follow the instructions that will be presented to you after entering the environment
These cover important caveats that newcomers stumble over commonly.
Enter the development environment for the first time
A new message is shown:

--- WARNING --- Please open the newly created flake.nix file and have a look at the # TODO comments! Once you're done, remove the lines that printed these warnings from the shellHook. -----------------
This points you to your entry point for modifying the environment. The comments in the flake will guide you to the resources you need to get started quickly, without being overwhelming.

Adding new templates

Just copy templates/empty and modify it. Then add the template to flake.nix following the other examples.