Update .gitignore and add flake.nix patching script for Flutter version management

.gitignore

@@ -9,6 +9,7 @@
 .history
 .svn/
 .direnv
+flake.nix.bak
 
 coverage/*
 

flake.lock

@@ -34,10 +34,27 @@
         "type": "github"
       }
     },
+    "nixpkgs-flutter": {
+      "locked": {
+        "lastModified": 1751285371,
+        "narHash": "sha256-/hDU+2AUeFFu5qGHO/UyFMc4UG/x5Cw5uXO36KGTk6c=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b9c03fbbaf84d85bb28eee530c7e9edc4021ca1b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b9c03fbbaf84d85bb28eee530c7e9edc4021ca1b",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-flutter": "nixpkgs-flutter"
       }
     },
     "systems": {

flake.nix

@@ -4,6 +4,7 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs-flutter.url = "github:NixOS/nixpkgs/b9c03fbbaf84d85bb28eee530c7e9edc4021ca1b";
   };
 
   outputs =
@@ -11,16 +12,23 @@
       self,
       nixpkgs,
       flake-utils,
+      nixpkgs-flutter,
     }:
     flake-utils.lib.eachDefaultSystem (
       system:
       let
+
         pkgs = import nixpkgs {
           inherit system;
           config = {
             allowUnfree = true;
             android_sdk.accept_license = true;
           };
+          overlays = [
+            (final: prev: {
+              flutter-pkg = import (self.inputs.nixpkgs-flutter) { inherit system; };
+            })
+          ];
         };
 
         androidSdk =
@@ -69,7 +77,7 @@
             with pkgs;
             [
               # Mobile development
-              flutter
+              pkgs.flutter-pkg.flutter
               fvm-wrapper
               jdk17
 
@@ -80,6 +88,7 @@
               # Python & task runner
               python3
               python3Packages.invoke
+              jq
 
               # System dependencies for Flutter on Linux
               git

update-flutter-nix.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+set -e
+
+# 0. Abhängigkeiten prüfen
+for cmd in jq curl sed nix; do
+  command -v $cmd >/dev/null 2>&1 || { echo "Fehler: $cmd nicht installiert!"; exit 1; }
+done
+
+# 1. Version aus .fvmrc extrahieren
+if [ ! -f .fvmrc ]; then
+    echo "Fehler: .fvmrc nicht gefunden!"
+    exit 1
+fi
+
+FLUTTER_VERSION=$(jq -r .flutter .fvmrc)
+echo "Gesuchte Flutter Version: $FLUTTER_VERSION"
+
+# 2. Commit-Hash und Version aus Devbox-API holen
+API_URL="https://search.devbox.sh/v2/pkg?name=flutter"
+RELEASES_JSON=$(curl -s "$API_URL")
+
+# Alle Versionen extrahieren und sortieren
+ALL_VERSIONS=$(echo "$RELEASES_JSON" | jq -r '.releases[].version' | sort -V)
+
+# Finde die gewünschte oder nächsthöhere Version
+FOUND_VERSION=$(echo "$ALL_VERSIONS" | awk -v v="$FLUTTER_VERSION" '$0 >= v { print; exit }')
+
+if [ -z "$FOUND_VERSION" ]; then
+  echo "Fehler: Keine passende Flutter-Version gefunden."
+  exit 1
+fi
+
+if [ "$FOUND_VERSION" != "$FLUTTER_VERSION" ]; then
+  echo "Hinweis: Exakte Version nicht gefunden, benutze stattdessen Version $FOUND_VERSION."
+fi
+
+# Commit-Hash für x86_64-linux extrahieren
+COMMIT=$(echo "$RELEASES_JSON" | jq -r --arg v "$FOUND_VERSION" '.releases[] | select(.version==$v) | .platforms[] | select(.system=="x86_64-linux") | .commit_hash' | head -n 1)
+
+if [ -z "$COMMIT" ] || [ "$COMMIT" == "null" ]; then
+  echo "Fehler: Kein Commit-Hash für Version $FOUND_VERSION und Plattform x86_64-linux gefunden."
+  exit 1
+fi
+
+echo "Gefundener Commit: $COMMIT (Version: $FOUND_VERSION)"
+
+
+# 3. Die flake.nix patchen (Backup anlegen)
+sed -i.bak "s|nixpkgs-flutter.url = \"github:NixOS/nixpkgs/[a-f0-9]*\";|nixpkgs-flutter.url = \"github:NixOS/nixpkgs/$COMMIT\";|" flake.nix
+
+# 4. Den Flake-Lock aktualisieren
+nix flake update nixpkgs-flutter
+
+# 5. Optional: direnv reload
+if command -v direnv >/dev/null 2>&1; then
+  direnv reload
+fi
+
+echo "Erfolgreich! Die flake.nix nutzt nun den Commit für Flutter $FLUTTER_VERSION (oder höher)."