feat: package get-apple-firmware script

nix/common.nix

@@ -21,6 +21,7 @@
     git
     python3
     dmg2img
+    (pkgs.callPackage ./pkgs/firmware-script.nix {})
   ];
 
   # ZFS is (sometimes) broken and prevents building without this

nix/pkgs/firmware-script.nix

@@ -0,0 +1,24 @@
+{ stdenvNoCC, fetchurl, lib }: stdenvNoCC.mkDerivation (final: {
+  pname = "get-apple-firmware";
+  version = "fe8c338e6cf1238a390984ba06544833ab8792d3";
+  src = fetchurl {
+    url = "https://raw.github.com/t2linux/wiki/${final.version}/docs/tools/firmware.sh";
+    hash = "sha256-DYghvLnG3DO8WmLIrT4p5yzCDWRevp3vx0wYtdTLyeY=";
+  };
+
+  dontUnpack = true;
+
+  buildPhase = ''
+    mkdir -p $out/bin
+    cp ${final.src} $out/bin/get-apple-firmware
+    chmod +x $out/bin/get-apple-firmware
+  '';
+
+  meta = {
+    description = "A script to get needed firmware for T2linux devices";
+    homepage = "https://t2linux.org";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ soopyc ];
+    mainProgram = "get-apple-firmware";
+  };
+})