Add nix files and install instructions

.gitignore

@@ -3,3 +3,4 @@
 .env
 .idea/
 .vscode/
+result

README.md

@@ -16,17 +16,12 @@
   <a href="https://discord.gg/Fq8bJSKPHh"><img src="https://img.shields.io/discord/954121165239115808" /></a>
 </p>
 
-
 [English] | [简体中文]
 
-
 Atuin replaces your existing shell history with a SQLite database, and records
 additional context for your commands. Additionally, it provides optional and
 _fully encrypted_ synchronisation of your history between machines, via an Atuin
-server.  
-
-
-
+server.
 
 <p align="center">
   <img src="demo.gif" alt="animated" width="80%" />
@@ -36,10 +31,6 @@ server.
 <em>exit code, duration, time and command shown</em>
 </p>
 
-
-
-
-
 As well as the search UI, it can do things like this:
 
 ```
@@ -81,17 +72,17 @@ I wanted to. And I **really** don't want to.
 - zsh
 - bash
 - fish
- 
+
 ## Community
 
 Atuin has a community Discord, available [here](https://discord.gg/Fq8bJSKPHh)
 
 # Quickstart
-  
+
 ## With the default sync server
-  
+
 This will sign you up for the default sync server, hosted by me. Everything is end-to-end encrypted, so your secrets are safe!
-  
+
 Read more below for offline-only usage, or for hosting your own server.
 
 ```
@@ -101,27 +92,28 @@ atuin register -u <USERNAME> -e <EMAIL> -p <PASSWORD>
 atuin import auto
 atuin sync
 ```
-  
+
 ### Opt-in to activity graph
+
 Alongside the hosted Atuin server, there is also a service which generates activity graphs for your shell history! These are inspired by the GitHub graph.
-  
+
 For example, here is mine:
-  
+
 ![](https://api.atuin.sh/img/ellie.png?token=0722830c382b42777bdb652da5b71efb61d8d387)
-  
+
 If you wish to get your own, after signing up for the sync server, run this
-  
+
 ```
 curl https://api.atuin.sh/enable -d $(cat ~/.local/share/atuin/session)
 ```
-  
-The response includes the URL to your graph. Feel free to share and/or embed this URL, the token is _not_ a secret, and simply prevents user enumeration. 
-  
+
+The response includes the URL to your graph. Feel free to share and/or embed this URL, the token is _not_ a secret, and simply prevents user enumeration.
+
 ## Offline only (no sync)
-  
+
 ```
 bash <(curl https://raw.githubusercontent.com/ellie/atuin/main/install.sh)
-            
+
 atuin import auto
 ```
 
@@ -146,25 +138,41 @@ toolchain, then you can run:
 ```
 cargo install atuin
 ```
-  
+
 And then follow [the shell setup](#shell-plugin)
 
 ### Homebrew
 
 ```
 brew install atuin
 ```
-  
+
 And then follow [the shell setup](#shell-plugin)
-  
+
 ### MacPorts
 
-Atuin is also available in [MacPorts](https://ports.macports.org/port/atuin/)  
-  
+Atuin is also available in [MacPorts](https://ports.macports.org/port/atuin/)
+
 ```
 sudo port install atuin
 ```
-
+
+And then follow [the shell setup](#shell-plugin)
+
+### Nix
+
+This repository is a flake, and can be installed using `nix profile`:
+
+```
+nix profile install "github:ellie/atuin"
+```
+
+Atuin is also available in [nixpkgs](https://github.com/NixOS/nixpkgs):
+
+```
+nix-env -f '<nixpkgs>' -iA atuin
+```
+
 And then follow [the shell setup](#shell-plugin)
 
 ### Pacman
@@ -174,7 +182,7 @@ Atuin is available in the Arch Linux [community repository](https://archlinux.or
 ```
 pacman -S atuin
 ```
-  
+
 And then follow [the shell setup](#shell-plugin)
 
 ### From source
@@ -184,7 +192,7 @@ git clone https://github.com/ellie/atuin.git
 cd atuin
 cargo install --path .
 ```
-  
+
 And then follow [the shell setup](#shell-plugin)
 
 ## Shell plugin
@@ -228,10 +236,10 @@ atuin init fish | source
 ```
 
 to your `is-interactive` block in your `~/.config/fish/config.fish` file
-  
+
 ### Fig
 
-Install `atuin` shell plugin in zsh, bash, or fish with [Fig](https://fig.io) in one click. 
+Install `atuin` shell plugin in zsh, bash, or fish with [Fig](https://fig.io) in one click.
 
 <a href="https://fig.io/plugins/other/atuin" target="_blank"><img src="https://fig.io/badges/install-with-fig.svg" /></a>
 

atuin.nix

@@ -0,0 +1,34 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  installShellFiles,
+  rustPlatform,
+  libiconv,
+  Security,
+  SystemConfiguration,
+}:
+rustPlatform.buildRustPackage rec {
+  name = "atuin";
+
+  src = lib.cleanSource ./.;
+
+  cargoLock.lockFile = ./Cargo.lock;
+
+  nativeBuildInputs = [installShellFiles];
+
+  buildInputs = lib.optionals stdenv.isDarwin [libiconv Security SystemConfiguration];
+
+  postInstall = ''
+    installShellCompletion --cmd atuin \
+      --bash <($out/bin/atuin gen-completions -s bash) \
+      --fish <($out/bin/atuin gen-completions -s fish) \
+      --zsh <($out/bin/atuin gen-completions -s zsh)
+  '';
+
+  meta = with lib; {
+    description = "Replacement for a shell history which records additional commands context with optional encrypted synchronization between machines";
+    homepage = "https://github.com/ellie/atuin";
+    license = licenses.mit;
+  };
+}

flake.nix

@@ -0,0 +1,31 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.outputs.legacyPackages.${system};
+    in {
+      packages.atuin = pkgs.callPackage ./atuin.nix {
+        inherit (pkgs.darwin.frameworks) Security SystemConfiguration;
+      };
+      packages.default = self.outputs.packages.${system}.atuin;
+
+      devShells.default = self.packages.${system}.default.overrideAttrs (super: {
+        nativeBuildInputs = with pkgs;
+          super.nativeBuildInputs
+          ++ [
+            cargo-edit
+            clippy
+            rustfmt
+          ];
+        RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
+      });
+    });
+}