add nix support

default.nix

@@ -0,0 +1,34 @@
+{ pkgs ? import <nixpkgs> {}, lib ? pkgs.lib, version ? null, ... }:
+let
+  wl-copy = lib.getExe' pkgs.wl-clipboard "wl-copy";
+  wl-paste = lib.getExe' pkgs.wl-clipboard "wl-paste";
+  xclip = lib.getExe pkgs.xclip;
+  php = lib.getExe pkgs.php;
+  replaces = {
+    "#!/usr/bin/env php" = "#!/usr/bin/env ${php}";
+    "$tool = basename($result[0] ?? '');" = /* php */ ''
+      if (getenv("XDG_SESSION_TYPE") == "wayland") {
+        $tool = "wl-copy";
+      } else {
+        $tool = "xclip";
+      }
+    '';
+    "= 'xclip"    = "= '${xclip}";
+    "= 'wl-copy"  = "= '${wl-copy}";
+    "= 'wl-paste" = "= '${wl-paste}";
+  };
+  script = pkgs.writeScriptBin "h-m-m" (let
+    prevScript = lib.fileContents ./h-m-m;
+  in if pkgs.stdenv.isDarwin then
+    lib.replaceStrings [ "#!/usr/bin/env php" ] [ "#!/usr/bin/env ${php}" ] prevScript
+  else
+    lib.replaceStrings (lib.attrNames replaces) (lib.attrValues replaces) prevScript);
+in script // lib.optionals (!isNull version) {
+  inherit version;
+} // {
+  meta = script.meta // {
+    description = "h-m-m is a keyboard-centric terminal-based tool for working with mind maps.";
+	homepage = "https://github.com/nadrad/h-m-m";
+	license = lib.licenses.gpl3;
+  };
+}

flake.lock

@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744502386,
+        "narHash": "sha256-QAd1L37eU7ktL2WeLLLTmI6P9moz9+a/ONO8qNBYJgM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "f6db44a8daa59c40ae41ba6e5823ec77fe0d2124",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,26 @@
+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    systems.url = "github:nix-systems/default";
+  };
+
+  outputs = { self, nixpkgs, systems, ... }: let
+    eachSystem = nixpkgs.lib.genAttrs (import systems);
+    version = let
+      rev = self.shortRev or self.dirtyShortRev or self.lastModified or null;
+    in if isNull rev then null else "r${toString rev}";
+  in {
+    packages = eachSystem (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      h-m-m = pkgs.callPackage ./. { inherit version; };
+      default = self.packages.${system}.h-m-m;
+    });
+    overlays.h-m-m = self: super: {
+      h-m-m = self.callPackage ./. { inherit version; };
+    };
+    overlays.default = self.overlays.h-m-m;
+  };
+}

readme.md

@@ -335,6 +335,66 @@ docker run --rm -it -v $(pwd):/app/ -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=
 alias hmm='docker run --rm -it -v $(pwd):/app/ -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=$DISPLAY hmm'
 ```
 
+## 5. Installation with Nix/NixOS
+<details>
+<summary>with flakes (NixOS)</summary>
+
+Below is a fragment of a NixOS configuration that add h-m-m to system packages.
+
+```nix
+{
+  description = "Simple NixOS configurations";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    h-m-m = {
+      url = "github:nadrad/h-m-m";
+      # Optional but recommended to limit the size of your system closure.
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+  outputs = { nixpkgs, h-m-m, ... }: {
+    nixosConfigurations = {
+      yourHost = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          # ...
+          {
+            nixpkgs.overlays = [ h-m-m.overlays.default ];
+          }
+          # add h-m-m to your system
+          ({ pkgs, ... }: {
+            environment.systemPackages = [ pkgs.h-m-m ];
+          });
+        ];
+      };
+    };
+  };
+}
+```
+</details>
+
+<details>
+<summary>with <code>nix profile</code></summary>
+
+You can also install it using the imperative method
+
+```sh
+$ nix profile install github:nadrad/h-m-m
+```
+</details>
+
+<details>
+<summary>with <code>nix shell</code> / <code>nix run</code></summary>
+
+If you don't want to install it on your system, you can try it with nix run or nix shell.
+
+```sh
+$ nix run github:nadrad/h-m-m -- <args>
+# or
+$ nix shell github:nadrad/h-m-m
+$ h-m-m <args>
+```
+</details>
 
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