add nix/nixos development enviroment and automation for easy maintenance

make flake check action check all systems

added assignment to assign myself to flake update prs.

fix actions to use determinsys

switch nix formatting check to flake check

Author: Eveeifyeve

Diff for: .envrc

@@ -0,0 +1 @@
+use flake

Diff for: .github/workflows/nix-check.yml

@@ -0,0 +1,28 @@
+name: Run nix checks on prs
+
+on:
+  pull_request:
+    branches: [ "master", "rewrite/v3" ]
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  check:
+    name: Check Nix
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Check flake.lock
+        uses: DeterminateSystems/flake-checker-action@main
+        with:
+          fail-mode: true
+      - name: Check Nix formatting 
+        run: nix flake check

Diff for: .github/workflows/update-nix.yml

@@ -0,0 +1,21 @@
+name: update-flake-lock
+on:
+  workflow_dispatch: # allows manual triggering
+  schedule:
+    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  lockfile:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: DeterminateSystems/update-flake-lock@main
+        with:
+          pr-title: "Update flake.lock"
+          pr-assignees: eveeifyeve

Diff for: .gitignore

@@ -12,3 +12,7 @@ config.toml
 .etc/blocks.json
 
 flame.svg
+
+.direnv
+result
+result-*

Diff for: flake.lock

@@ -0,0 +1,75 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    inputs@{
+      flake-parts,
+      nixpkgs,
+      rust-overlay,
+      ...
+    }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = nixpkgs.lib.systems.flakeExposed;
+
+      perSystem =
+        {
+          pkgs,
+          system,
+          ...
+        }:
+        {
+					formatter = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
+          _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [
+							rust-overlay.overlays.default
+          		(self: super: {
+            		rustToolchain = let rust = super.rust-bin;
+            		in if builtins.pathExists ./rust-toolchain.toml then
+              		rust.fromRustupToolchainFile ./rust-toolchain.toml
+            		else if builtins.pathExists ./rust-toolchain then
+              		rust.fromRustupToolchainFile ./rust-toolchain
+            		else
+              		rust.nightly.latest.default;
+          })
+            ];
+            config = { };
+          };
+
+          # Used to check formatting for nix specificly
+          checks.fmt-check =
+            pkgs.runCommand "format-check"
+              {
+                src = ./.;
+                doCheck = true;
+                nativeBuildInputs = [
+                  pkgs.nixfmt-rfc-style
+                ];
+              }
+              ''
+                					nixfmt --check .
+                					touch $out
+                				'';
+
+          devShells.default = pkgs.mkShell {
+            packages = with pkgs; [
+              rustToolchain
+              pkg-config
+              openssl
+            ];
+          };
+
+        };
+    };
+}

Diff for: flake.nix

@@ -0,0 +1,12 @@
+(import (
+  let
+    lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+    nodeName = lock.nodes.root.inputs.flake-compat;
+  in
+  fetchTarball {
+    url =
+      lock.nodes.${nodeName}.locked.url
+        or "https://github.com/edolstra/flake-compat/archive/${lock.nodes.${nodeName}.locked.rev}.tar.gz";
+    sha256 = lock.nodes.${nodeName}.locked.narHash;
+  }
+) { src = ./.; }).shellNix