add flake (output package and nixosModule)

Author: e-v-o-l-v-e

README.md

@@ -74,6 +74,37 @@ Download the appropriate binary for your system from the [latest release](https:
 
 Make the binary executable (for Linux/macOS) with `chmod +x local-content-share-*` and then run the binary with `./local-content-share-*`. The application will be available at `http://localhost:8080`.
 
+### Using Nix flakes
+
+#### Run without installing
+```sh
+nix run nixpkgs#local-content-share
+```
+
+#### Install
+```sh
+nix profile install nixpkgs#local-content-share
+```
+
+### Using the NixOS Module
+
+There is a Nixos module for the app, you need to be on the unstable branch.
+
+```nix
+  services.local-content-share.enable = true;
+```
+
+The NixOS module provides the following options:
+
+| Option | Default | Description |
+| --- | --- | --- |
+| `enable` | false | Whether the service should be enabled or not |
+| `port` | 8080 | The port that local-content-share will be available at |
+| `listenAddress` | empty string | Which address to listen on, all if not set |
+| `openFirewall` | false | Whether to open the specified port in the firewall |
+| `package` | nixpkgs's | The package used by nixos for the service |
+
+
 ### Local development
 
 With `Go 1.23+` installed, run the following to download the binary to your GOBIN:

flake.lock

@@ -0,0 +1,103 @@
+{
+  description = "Share file/text in your local network";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
+  in {
+    packages = forAllSystems (
+      system: let
+        pkgs = import nixpkgs {inherit system;};
+      in {
+        local-content-share = pkgs.buildGoModule {
+          pname = "local-content-share";
+          version = ""; # nix needs version to be set, though setting it to the right one would mean it needs to be updated at each release
+          src = ./.;
+          vendorHash = null;
+
+          meta = {
+            mainProgram = "local-content-share";
+            description = "Self-hosted app for storing/sharing text/files in your local network with no setup on client devices";
+            homepage = "https://github.com/Tanq16/local-content-share";
+          };
+        };
+        default = self.packages.${system}.local-content-share;
+      }
+    );
+
+    nixosModules.local-content-share = {
+      pkgs,
+      lib,
+      config,
+      ...
+    }: let
+      cfg = config.services.local-content-share;
+    in {
+      options.services.local-content-share = {
+        enable = lib.mkEnableOption "Local-Content-Share";
+
+        package = lib.mkPackageOption pkgs "local-content-share" {};
+
+        listenAddress = lib.mkOption {
+          type = lib.types.str;
+          default = "";
+          example = "127.0.0.1";
+          description = ''
+            Address on which the service will be available.
+
+            The service will listen on all interfaces if set to an empty string.
+          '';
+        };
+
+        port = lib.mkOption {
+          type = lib.types.port;
+          default = 8080;
+          description = "Port on which the service will be available";
+        };
+
+        openFirewall = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Whether to automatically open the specified port in the firewall";
+        };
+      };
+
+      config = lib.mkIf cfg.enable {
+        systemd.services.local-content-share = {
+          after = ["network.target"];
+          wantedBy = ["multi-user.target"];
+
+          serviceConfig = {
+            Type = "simple";
+            DynamicUser = true;
+            User = "local-content-share";
+            StateDirectory = "local-content-share";
+            StateDirectoryMode = "0700";
+            WorkingDirectory = "/var/lib/local-content-share";
+            ExecStart = "${lib.getExe' cfg.package "local-content-share"} -listen=${cfg.listenAddress}:${toString cfg.port}";
+            Restart = "on-failure";
+          };
+        };
+
+        networking.firewall = lib.mkIf cfg.openFirewall {
+          allowedTCPPorts = [cfg.port];
+        };
+      };
+    };
+
+    nixosModules.default = self.nixosModules.local-content-share;
+  };
+}