Init commit - debian with GUI

vm.nix

@@ -0,0 +1,84 @@
+# vm.nix
+let
+  pkgs = import <nixpkgs> {};
+in
+
+let
+  # 1. SOURCE YOUR DEBIAN IMAGE
+  debianImage = pkgs.fetchurl {
+    name = "debian-13-genericcloud-amd64.qcow2";
+    url = "https://cloud.debian.org/images/cloud/trixie/latest/debian-13-genericcloud-amd64.qcow2";
+    hash = "sha256-V9a6DUghJB5j4Vz9Y5aikZ8syhx5Zn2593m8/8xNwIU="; # REPLACE THIS
+  };
+
+  # 2. VM DATA DIRECTORY
+  vmDataDir = "/home/${builtins.getEnv "USER"}/.local/share/debian-vm";
+
+  # 3. CREATE ALL FILES IN A SCRIPT
+  setupScript = pkgs.writeShellScriptBin "setup-vm-files" ''
+    set -e
+    
+    # Create VM directory
+    mkdir -p "${vmDataDir}"
+    
+    # Create persistent disk if it doesn't exist
+    if [ ! -f "${vmDataDir}/debian-persistent.qcow2" ]; then
+      echo "Creating persistent disk from base image..."
+      ${pkgs.qemu}/bin/qemu-img create -f qcow2 \
+        -b "${debianImage}" \
+        -F qcow2 \
+        "${vmDataDir}/debian-persistent.qcow2"
+    fi
+    
+    # Create cloud-init configuration
+    cat > "${vmDataDir}/user-data" << 'EOF'
+    #cloud-config
+    password: nixos
+    chpasswd: { expire: False }
+    ssh_pwauth: True
+    runcmd:
+      - |
+        if [ ! -f /etc/vm-initialized ]; then
+          cd /home/debian
+          sudo -u debian git clone https://github.com/someone/something
+          cd something
+          chmod +x install.sh
+          sudo -u debian ./install.sh
+          touch /etc/vm-initialized
+        fi
+    EOF
+    
+    # Create cloud-init ISO
+    ${pkgs.cloud-utils}/bin/cloud-localds \
+      "${vmDataDir}/cloud-init.iso" \
+      "${vmDataDir}/user-data"
+    
+    echo "VM files created in ${vmDataDir}"
+  '';
+
+  # 4. LAUNCH SCRIPT
+  runScript = pkgs.writeShellScriptBin "run-debian-vm" ''
+    set -e
+    
+    # Run setup first
+    ${setupScript}/bin/setup-vm-files
+    
+    # Launch QEMU with KVM acceleration
+    ${pkgs.qemu_kvm}/bin/qemu-kvm \
+      -name "Debian-Persistent-VM" \
+      -machine accel=kvm \
+      -cpu host \
+      -m 2048 \
+      -drive file="${vmDataDir}/debian-persistent.qcow2",format=qcow2,if=virtio \
+      -drive file="${vmDataDir}/cloud-init.iso",format=raw,if=virtio \
+      -netdev user,id=n1,hostfwd=tcp::2222-:22 \
+      -device virtio-net-pci,netdev=n1 \
+      -display gtk \
+      -vga virtio \
+      "$@"
+  '';
+
+in
+{
+  system.build.customVM = runScript;
+}