added support for unixODBC in configuration.nix writing /etc/odbcinst.ini

svn path=/nixos/trunk/; revision=12045

etc/default.nix

@@ -258,7 +258,14 @@ import ../helpers/make-etc.nix {
     target = "nix.machines";
   }
     
+  # unixODBC drivers (this solution is not perfect.. Because the user has to
+  # ask the admin to add a driver.. but it's an easy solution which works)
+  ++ (let inis = config.environment.unixODBCDrivers pkgs;
+      in optional ((pkgs.lib.traceWhatis inis) != [] ) {
+        source = pkgs.writeText "odbcinst.ini" (pkgs.lib.concatStringsSep "\n" inis);
+        target = "odbcinst.ini";
+      })
+
   # Additional /etc files declared by Upstart jobs.
   ++ extraEtc;
-  
 }

system/options.nix

@@ -2473,6 +2473,13 @@ root        ALL=(ALL) SETENV: ALL
         If all configuration options must be checked. Non-existing options fail build.
       ";
     };
+
+    unixODBCDrivers = mkOption {
+      default = pkgs : [];
+      example = "pkgs : map (x : x.ini) (with pkgs.unixODBCDrivers; [ mysql psql psqlng ] )";
+      description = "specifies unix odbc drivers to be registered at /etc/odbcinst.ini";
+    };
+
   };
   
   nesting = {