Add Nix Flake

[justDeeevin]

See #140.
In addition to packaging the app, this flake provides a home-manager module with which users can configure Posting in Nix.

[justDeeevin]

Draft because home-manager module is WIP. The package itself builds and runs.

[noahfraiture]

Hey, I'm starting nix. Do you have an example of how you install posting in your nix configuration with this ? Do you simply have to add this repo in inputs of a flake ?

[justDeeevin]

1. add the repo to inputs
2. add specialArgs = {inherit inputs;} as an attribute in the nixosSystem function call
3. add inputs argument to your config module
4. add inputs.posting.packages.<system>.default to your systemPackages (where <system> is your system, probably x86_64-linux)

See this reddit thread, or look at my nixos flake for more.

[darrenburns]

I've never used Nix and have no clue how to test this, so would appreciate if someone else more familiar with it is able to chime in here.

[mhkarimi1383]

Awesome
Can you also provide documentation related to how to use it?

[justDeeevin]

In the README?

[mhkarimi1383]

Yes, it should be added into tge How to install part

[justDeeevin]

Apologies for the flood of commits--I'm not aware of any way to test the home manager module apart from using it in my system configuration, which means that I have to have the changes on github to test them... this probably should get squashed before merging to be honest

I think this state of docs is good. Thoughts?

[mhkarimi1383]

I think a full example would be great

[justDeeevin]

I've added an example that replicates the example configuration used in the other docs, along with a custom theme also pulled from the documentation.

[mhkarimi1383]

Awesome

Addimg a sample flake config would be also great :)
It will make it easy to use

[justDeeevin]

README felt like the right place, but I could repurpose home_manager.md to just be nix.md if you think it belongs outside of the README

[justDeeevin]

Alright, that should be everything!

[mhkarimi1383]

Awesome waiting for merge :)

[justDeeevin]

Since this is going stale, I've made a flake-only repo.