readding synergy

svn path=/nixos/branches/fix-style/; revision=14789

system/options.nix

@@ -480,6 +480,8 @@ in
     (import ../upstart-jobs/mingetty.nix) # The terminals on ttyX.
     (import ../upstart-jobs/tty-backgrounds.nix) #FIXME (assertion)
 
+    (import ../upstart-jobs/synergy.nix)
+
     # nix
     (import ../upstart-jobs/nix.nix) # nix options and daemon
     (import ../system/nixos-installer.nix)

upstart-jobs/synergy.nix

@@ -0,0 +1,129 @@
+
+{pkgs, config, ...}:
+
+###### interface
+let
+  inherit (pkgs.lib) mkOption mkIf;
+
+  options = {
+    services = {
+      synergy = {
+
+        client = {
+          enable = mkOption {
+            default = false;
+            description = "
+              Whether to enable the synergy client (receive keyboard and mouse events from a synergy server)
+            ";
+          };
+          screenName = mkOption {
+            default = "";
+            description = " 
+              use screen-name instead the hostname to identify
+              ourselfs to the server.
+              ";
+          };
+        };
+
+        server = {
+          enable = mkOption {
+            default = false;
+            description = "
+              Whether to enable the synergy server (send keyboard and mouse events)
+            ";
+          };
+          configFile = mkOption {
+            default = "/etc/synergy-server.conf";
+            description = "
+              The synergy server configuration file. open upstart-jobs/synergy.nix to see an example
+            ";
+          };
+          screenName = mkOption {
+            default = "";
+            description = " 
+              use screen-name instead the hostname to identify
+              this screen in the configuration.
+              ";
+          };
+          address = mkOption {
+            default = "";
+            description = "listen for clients on the given address";
+          };
+        };
+      };
+    };
+  };
+
+###### implementation
+
+  inherit (pkgs.lib) optional;
+
+  cfgC = (config.services.synergy.client);
+  cfgS = (config.services.synergy.server);
+
+  clientJob = {
+    name = "synergy-client";
+
+    job = ''
+      description "synergy client"
+
+      start on started network-interfaces
+      stop on stopping network-interfaces
+
+      respawn ${pkgs.synergy}/bin/synergyc ${if cfgS.screenName == "" then "" else "-n ${cfgS.screenName}" }
+    '';
+  };
+
+  serverJob = {
+    name = "synergy-server";
+
+    job = ''
+      description "synergy server"
+
+      start on started network-interfaces
+      stop on stopping network-interfaces
+
+      respawn ${pkgs.synergy}/bin/synergys -c ${cfgS.configFile} \
+       -f ${if cfgS.address == "" then "" else "-a ${cfgS.address}"} \
+       ${if cfgS.screenName == "" then "" else "-n ${cfgS.screenName}" }
+    '';
+  };
+
+in
+
+
+mkIf config.services.sshd.enable {
+  require = [
+    options
+  ];
+
+  services = {
+    extraJobs = (optional cfgS.enable serverJob) 
+             ++ (optional cfgC.enable clientJob);
+  };
+}
+
+/* SYNERGY SERVER example configuration file
+section: screens
+  laptop:
+  dm:
+  win:
+end
+section: aliases
+    laptop: 
+      192.168.5.5
+    dm:
+      192.168.5.78
+    win:
+      192.168.5.54
+end
+section: links
+   laptop:
+       left = dm
+   dm:
+       right = laptop
+       left = win
+  win:
+      right = dm
+end
+*/