Initial support for building with nix. (#106)

Add flake.nix to project, so this project can be built with nix. 

Also:
- Fix a died link in README.
- Add missing dependencies in docs for Ubuntu and Arch (not tested).

README.md

@@ -44,7 +44,7 @@ ___
 
 ## 如何构建
 
-关于如何从头构建FreeKill，详见[编译教程](./doc/dev/compile.md)。
+关于如何从头构建FreeKill，详见[编译教程](https://notify-ctrl.github.io/FreeKill/dev/compile.html)。
 
 ___
 

docs/dev/compile.rst

@@ -46,13 +46,13 @@ Debian一家子：
 
 .. code:: sh
 
-   $ sudo apt install liblua5.4-dev libsqlite3-dev libssl-dev swig flex bison
+   $ sudo apt install liblua5.4-dev libsqlite3-dev libreadline-dev libssl-dev swig flex bison
 
 Arch Linux：
 
 .. code:: sh
 
-   $ sudo pacman -Sy lua sqlite swig openssl flex bison
+   $ sudo pacman -Sy lua sqlite swig openssl flex bison libgit2
 
 然后使用配置好的QtCreator环境即可编译。
 
@@ -71,6 +71,13 @@ Arch Linux：
    $ cmake ..
    $ make -j8
 
+如果你使用 Nix/NixOs 的话，可以在clone repo后直接使用 nix flake 构建：
+
+.. code:: sh
+   
+   $ git clone https://github.com/Notify-ctrl/FreeKill
+   $ nix build '.?submodules=1'
+
 --------------
 
 Linux服务器

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1680724564,
+        "narHash": "sha256-eeUUGOTKTelYKDbUxKs0V7GUa186L2fym7jM2QQ4Oss=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "36adaa6aaa6b03e59102df0c1b12cdc3f23fd112",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,38 @@
+{
+  description = "Sanguosha (a.k.a. Legend of Three Kingdoms, LTK) written in Qt and Lua.";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-22.11";
+  };
+
+  outputs = { self, nixpkgs }: {
+    defaultPackage.x86_64-linux =
+      with import nixpkgs { system = "x86_64-linux"; };
+      stdenv.mkDerivation {
+        name = "freekill";
+        version = "0.0.7";
+        src = self;
+
+        buildInputs = with qt6; [
+          qtbase
+          qtdeclarative
+          qt5compat
+          qtmultimedia
+          qttools
+          sqlite
+          swig
+          openssl
+          flex
+          bison
+          readline
+          libgit2
+          lua5_4
+        ];
+        nativeBuildInputs = [ cmake qt6.wrapQtAppsHook ];
+
+        postPatch = ''
+          substituteInPlace src/CMakeLists.txt --replace "LUA_LIB lua5.4" "LUA_LIB lua";
+        '';
+      };
+  };
+}