print driver for jadens thermal label printer

.gitignore

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+# Nix build artefacts
+result
+result-*

default.nix

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+{ pkgs ? import <nixpkgs> { } }:
+
+pkgs.callPackage ./package.nix { }

package.nix

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+{ lib
+, stdenv
+, fetchurl
+, dpkg
+, autoPatchelfHook
+, cups
+}:
+
+stdenv.mkDerivation rec {
+  pname = "rollo-cups-driver";
+  version = "1.8.4-1";
+
+  src = fetchurl {
+    url = "https://rollo-main.b-cdn.net/driver-dl/linux/rollo-cups-driver_${version}_amd64.deb";
+    # Rollo's CDN gates the download on a Referer header, so we have to pass
+    # it through fetchurl's underlying curl call.
+    curlOptsList = [ "-H" "Referer: https://www.rollo.com/driver-linux/" ];
+    hash = "sha256-01SKxC5qPdfpMqsCR6UuogmvbrYwF7BI+C1ptURfNko="; # replace after first build, see notes below
+  };
+
+  nativeBuildInputs = [ dpkg autoPatchelfHook ];
+  buildInputs = [ stdenv.cc.cc.lib cups ];
+
+  unpackPhase = ''
+    runHook preUnpack
+    dpkg-deb -x $src debroot
+    runHook postUnpack
+  '';
+
+  dontBuild = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/lib/cups/filter
+    mkdir -p $out/share/cups/model
+
+    # Layout inside the .deb has moved around between Rollo releases, so
+    # grab anything that looks like the filter binary or a PPD rather than
+    # hardcoding one path.
+    find debroot -type f \( -iname 'rastertorollo*' -o -iname 'rastertolabel*' \) \
+      -exec install -m755 {} $out/lib/cups/filter/ \;
+
+    find debroot -type f -iname '*.ppd' \
+      -exec install -m644 {} $out/share/cups/model/ \;
+
+    runHook postInstall
+  '';
+
+  # autoPatchelfHook rewrites the ELF interpreter/rpath to point at
+  # $buildInputs in the Nix store instead of /lib64/ld-linux-x86-64.so.2
+  # and the FHS lib paths the binary was linked against.
+
+  meta = with lib; {
+    description = "Rollo/Beeprt/JADENS proprietary CUPS raster filter for TSPL thermal label printers";
+    homepage = "https://www.rollo.com/driver-linux/";
+    license = licenses.unfree;
+    platforms = [ "x86_64-linux" ];
+    sourceProvenance = with sourceTypes; [ binaryNativeCode ];
+  };
+}