feat: add Nix flake

.gitignore

@@ -1 +1,4 @@
 /target
+
+# Nix output
+/result*

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1723151389,
+        "narHash": "sha256-9AVY0ReCmSGXHrlx78+1RrqcDgVSRhHUKDVV1LLBy28=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "13fe00cb6c75461901f072ae62b5805baef9f8b2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "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": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,44 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils }: utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = import nixpkgs { inherit system; };
+    in
+    rec {
+      packages.forgejo-cli = pkgs.rustPlatform.buildRustPackage {
+        pname = "forgejo-cli";
+        version = "0.1.1";
+        src = pkgs.lib.cleanSource ./.;
+
+        cargoLock.lockFile = ./Cargo.lock;
+
+        nativeBuildInputs = with pkgs; [ pkg-config ];
+        buildInputs = with pkgs; [ openssl ];
+
+        meta = with pkgs.lib; {
+          description = "CLI tool for Forgejo";
+          homepage = "https://codeberg.org/Cyborus/forgejo-cli/";
+          license = with licenses; [ asl20 /* or */ mit ];
+        };
+      };
+
+      packages.default = packages.forgejo-cli;
+
+      devShells.default = pkgs.mkShell {
+        inputsFrom = [ packages.default ];
+
+        nativeBuildInputs = with pkgs; [
+          cargo
+          rustc
+        ];
+
+        # Required for rust-analyzer to work
+        RUST_SRC_PATH = "${pkgs.rustPlatform.rustcSrc}/library";
+      };
+    });
+}
+