refactor rescue-debian

pkgs/mrescue-debian.nix

@@ -0,0 +1,49 @@
+{
+  pkgs,
+  stdenv,
+  fetchurl,
+}:
+{
+  flavor,
+  hash,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "mrescue-debian-${flavor}";
+  version = "13.3.0";
+
+  src = fetchurl {
+    url = "https://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-${version}-amd64-${flavor}.iso";
+    inherit hash;
+  };
+
+  nativeBuildInputs = with pkgs; [
+    p7zip
+  ];
+
+  sourceRoot = ".";
+
+  unpackPhase = ''
+    runHook preUnpack
+    mkdir debian-live
+    7z x -odebian-live $src >/dev/null
+    runHook postUnpack
+  '';
+
+  buildPhase = ''
+    runHook preBuild
+    # No build phase needed - files are extracted directly
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out
+    install -Dm644 debian-live/live/vmlinuz $out/kernel
+    install -Dm644 debian-live/live/initrd.img $out/initrd
+    install -Dm644 debian-live/live/filesystem.squashfs $out/filesystem.squashfs
+
+    runHook postInstall
+  '';
+}