add nix dev flake for development on nixos

flake.lock

@@ -0,0 +1,82 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1782918843,
+        "narHash": "sha256-ETYnV9U7Sr+A45dohzZdfCZKOss4qrTkO+wgNZNvEc0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "e8273b29fe1390ec8d4603f2477357555291432e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay",
+        "utils": "utils"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1782962170,
+        "narHash": "sha256-HsaK9yDDypMB2TPxAYz0mPKtmYhgNwFQa72b3Ko6kRE=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "e3fa5cf86b93914b8f312b2a1ca14fbb139c655c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Nix development flake for SoftwareManager-rs";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      utils,
+      rust-overlay,
+      ...
+    }:
+
+    utils.lib.eachDefaultSystem (
+      system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+        rust = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+
+        libs = with pkgs; [
+          libX11
+          libXrandr
+          libXinerama
+          libXcursor
+          libXi
+          libxkbcommon
+        ];
+
+      in
+      {
+        devShells = {
+          default =
+            with pkgs;
+            mkShell {
+              buildInputs = [
+                rust
+                cargo-nextest
+              ]
+              ++ libs;
+
+              shellHook = ''
+                echo Entered Rust dev shell for project SoftwareManager-rs
+              '';
+            };
+        };
+      }
+    );
+
+}

rust-toolchain.toml

@@ -0,0 +1,9 @@
+[toolchain]
+channel = "nightly"
+components = [
+	"clippy",
+	"rustfmt",
+	"rust-analyzer",
+	"rust-src",
+	"rustc-codegen-cranelift",
+]