nixpkgs/pkgs/misc/sane-backends/default.nix

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{ stdenv, fetchurl, hotplugSupport ? true, libusb ? null
, gt68xxFirmware ? null }:
let
firmware = gt68xxFirmware {inherit fetchurl;};
in
assert hotplugSupport -> (stdenv.system == "i686-linux" || stdenv.system == "x86_64-linux");
stdenv.mkDerivation {
name = "sane-backends-1.0.22";
src = fetchurl {
url = http://alioth.debian.org/frs/download.php/3503/sane-backends-1.0.22.tar.gz;
sha256 = "0m0cz4ljw9asqvpryl6gx1ndwf7ll2qinlvql9whnzs901la314z";
};
udevSupport = hotplugSupport;
buildInputs = if libusb != null then [libusb] else [];
postInstall = ''
if test "$udevSupport" = "1"; then
mkdir -p $out/etc/udev/rules.d/
./tools/sane-desc -m udev > $out/etc/udev/rules.d/60-libsane.rules || \
cp tools/udev/libsane.rules $out/etc/udev/rules.d/60-libsane.rules
fi
'';
preInstall =
if gt68xxFirmware != null then
"mkdir -p \${out}/share/sane/gt68xx ; ln -s " + firmware.fw +
" \${out}/share/sane/gt68xx/" + firmware.name
else "";
}