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

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{stdenv, fetchurl, hotplugSupport ? false, libusb ? null,
gt68xxFirmware ? null}:
assert hotplugSupport -> stdenv.system == "i686-linux";
stdenv.mkDerivation {
name = "sane-backends-1.0.20";
src = fetchurl {
url = ftp://ftp.sane-project.org/pub/sane/sane-backends-1.0.20/sane-backends-1.0.20.tar.gz;
sha256 = "0fixmq3jbz77zcy2cikb882kz8bq3n40n0jaykiczfcjc4g57ccg";
};
udevSupport = hotplugSupport;
buildInputs = if libusb != null then [libusb] else [];
postInstall = ''
if test "$udevSupport" = "1"; then
ensureDir $out/etc/udev/rules.d/
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 " +
(gt68xxFirmware {inherit fetchurl;}) +
" \${out}/share/sane/gt68xx/PS1fw.usb "
else "";
}