Apply mornfall's SANE patches

Fix sane-backends to generate udev rules, add a snapshot of sane-backends's unstable repo, and add a SANE nixos module

svn path=/nixos/trunk/; revision=30764

1 files changed, 34 insertions, 0 deletions

diff --git a/modules/services/hardware/sane.nix b/modules/services/hardware/sane.nix
new file mode 100644
index 00000000000..e9f32a2662c
--- /dev/null
+++ b/modules/services/hardware/sane.nix
@@ -0,0 +1,34 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+{
+
+  ###### interface
+
+  options = {
+
+    hardware.sane.enable = mkOption {
+      default = false;
+      description = "Enable support for SANE scanners.";
+    };
+
+    hardware.sane.snapshot = mkOption {
+      default = false;
+      description = "Use a development snapshot of SANE scanner drivers.";
+    };
+
+  };
+
+
+  ###### implementation
+
+    config = let pkg = if config.hardware.sane.snapshot
+                          then pkgs.saneBackendsSnapshot
+                          else pkgs.saneBackends;
+      in mkIf config.hardware.sane.enable {
+           environment.systemPackages = [ pkg ];
+           services.udev.packages = [ pkg ];
+      };
+
+}