From c80385d93469aeb2d4134ef0056cea330c48c251 Mon Sep 17 00:00:00 2001
From: Dan Callahan <dan.callahan@gmail.com>
Date: Fri, 8 Mar 2019 14:58:32 +0000
Subject: [PATCH] dsseries: init at 1.0.5-1

---
 nixos/modules/module-list.nix                 |  1 +
 .../hardware/sane_extra_backends/dsseries.nix | 26 +++++++++
 .../sane/backends/dsseries/default.nix        | 53 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 +
 4 files changed, 82 insertions(+)
 create mode 100644 nixos/modules/services/hardware/sane_extra_backends/dsseries.nix
 create mode 100644 pkgs/applications/graphics/sane/backends/dsseries/default.nix

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 6bccd253500a..773389fa7189 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -311,6 +311,7 @@
   ./services/hardware/ratbagd.nix
   ./services/hardware/sane.nix
   ./services/hardware/sane_extra_backends/brscan4.nix
+  ./services/hardware/sane_extra_backends/dsseries.nix
   ./services/hardware/tcsd.nix
   ./services/hardware/tlp.nix
   ./services/hardware/thinkfan.nix
diff --git a/nixos/modules/services/hardware/sane_extra_backends/dsseries.nix b/nixos/modules/services/hardware/sane_extra_backends/dsseries.nix
new file mode 100644
index 000000000000..d71a17f5ea6b
--- /dev/null
+++ b/nixos/modules/services/hardware/sane_extra_backends/dsseries.nix
@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  options = {
+
+    hardware.sane.dsseries.enable =
+      mkEnableOption "Brother DSSeries scan backend" // {
+      description = ''
+        When enabled, will automatically register the "dsseries" SANE backend.
+
+        This supports the Brother DSmobile scanner series, including the
+        DS-620, DS-720D, DS-820W, and DS-920DW scanners.
+      '';
+    };
+  };
+
+  config = mkIf (config.hardware.sane.enable && config.hardware.sane.dsseries.enable) {
+
+    hardware.sane.extraBackends = [ pkgs.dsseries ];
+    services.udev.packages = [ pkgs.dsseries ];
+    boot.kernelModules = [ "sg" ];
+
+  };
+}
diff --git a/pkgs/applications/graphics/sane/backends/dsseries/default.nix b/pkgs/applications/graphics/sane/backends/dsseries/default.nix
new file mode 100644
index 000000000000..01c203b407c1
--- /dev/null
+++ b/pkgs/applications/graphics/sane/backends/dsseries/default.nix
@@ -0,0 +1,53 @@
+{ stdenv, fetchurl, rpmextract }:
+
+stdenv.mkDerivation rec {
+  name = "libsane-dsseries-${version}";
+  version = "1.0.5-1";
+
+  src = fetchurl {
+    url = "https://download.brother.com/welcome/dlf100974/${name}.x86_64.rpm";
+    sha256 = "1wfdbfbf51cc7njzikdg48kwpnpc0pg5s6p0s0y3z0q7y59x2wbq";
+  };
+
+  nativeBuildInputs = [ rpmextract ];
+
+  unpackCmd = ''
+    mkdir ${name} && pushd ${name}
+    rpmextract $curSrc
+    popd
+  '';
+
+  patchPhase = ''
+    substituteInPlace etc/udev/rules.d/50-Brother_DSScanner.rules \
+      --replace 'GROUP="users"' 'GROUP="scanner", ENV{libsane_matched}="yes"'
+
+    mkdir -p etc/sane.d/dll.d
+    echo "dsseries" > etc/sane.d/dll.d/dsseries.conf
+  '';
+
+  installPhase = ''
+    mkdir -p $out
+    cp -dr etc $out
+    cp -dr usr/lib64 $out/lib
+  '';
+
+  preFixup = ''
+    for f in `find $out/lib/sane/ -type f`; do
+      # Make it possible to find libstdc++.so.6
+      patchelf --set-rpath ${stdenv.cc.cc.lib}/lib:$out/lib/sane $f
+
+      # Horrible kludge: The driver hardcodes /usr/lib/sane/ as a dlopen path.
+      # We can directly modify the binary to force a relative lookup instead.
+      # The new path is NULL-padded to the same length as the original path.
+      sed -i "s|/usr/lib/sane/%s|%s\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00|g" $f
+    done
+  '';
+
+  meta = {
+    description = "Brother DSSeries SANE backend driver";
+    homepage = http://www.brother.com;
+    platforms = stdenv.lib.platforms.linux;
+    license = stdenv.lib.licenses.unfree;
+    maintainers = with stdenv.lib.maintainers; [ callahad ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6f25783a71d7..7ee4338b5f74 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22869,6 +22869,8 @@ in
 
   brscan4 = callPackage ../applications/graphics/sane/backends/brscan4 { };
 
+  dsseries = callPackage ../applications/graphics/sane/backends/dsseries { };
+
   mkSaneConfig = callPackage ../applications/graphics/sane/config.nix { };
 
   sane-frontends = callPackage ../applications/graphics/sane/frontends.nix { };