Add nix flake for reproducible development environment

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -42,3 +42,4 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+/.direnv/

.metadata

@@ -1,11 +1,11 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled.
+# This file should be version controlled and should not be manually edited.
 
 version:
-  revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-  channel: stable
+  revision: "nixpkgs000000000000000000000000000000000"
+  channel: "stable"
 
 project_type: app
 
@@ -13,26 +13,11 @@ project_type: app
 migration:
   platforms:
     - platform: root
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-    - platform: android
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-    - platform: ios
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-    - platform: linux
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-    - platform: macos
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
+      create_revision: nixpkgs000000000000000000000000000000000
+      base_revision: nixpkgs000000000000000000000000000000000
     - platform: web
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-    - platform: windows
-      create_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
-      base_revision: b4bce91dd0f168179d46a7ae5eceb3572ba9637a
+      create_revision: nixpkgs000000000000000000000000000000000
+      base_revision: nixpkgs000000000000000000000000000000000
 
   # User provided section
 

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1734466380,
+        "narHash": "sha256-BERwUGx7BMin5JqBYWjjD/QLZpREQBloR2CpPBc6opY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "96ec91155148c857617fbf98ec1eabc61485181b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs-unstable": "nixpkgs-unstable"
+      }
+    },
+    "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 +1,44 @@
+{
+  description = "Flutter";
+  inputs = {
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/master";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs =
+    {
+      self,
+      nixpkgs-unstable,
+      flake-utils,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs-unstable {
+          inherit system;
+          config = {
+            android_sdk.accept_license = true;
+            allowUnfree = true;
+          };
+        };
+        buildToolsVersion = "33.0.2";
+        androidComposition = pkgs.androidenv.composeAndroidPackages {
+          buildToolsVersions = [ buildToolsVersion ];
+          platformVersions = [ "33" ];
+          abiVersions = [ "arm64-v8a" ];
+        };
+        androidSdk = androidComposition.androidsdk;
+      in
+      {
+        devShell =
+          with pkgs;
+          mkShell rec {
+            ANDROID_SDK_ROOT = "${androidSdk}/libexec/android-sdk";
+            buildInputs = [
+              flutter
+              androidSdk
+              jdk11
+            ];
+          };
+      }
+    );
+}