Slaves and Exim

[hcoop/domtool2.git] / src / plugins / exim.sml

(* HCoop Domtool (http://hcoop.sourceforge.net/)
 * Copyright (c) 2006, Adam Chlipala
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *)

(* Exim MTA handling *)

structure Exim :> EXIM = struct

val aliasesChanged = ref false
val aliasesDefaultChanged = ref false

val () = Slave.registerPreHandler
	     (fn () => (aliasesChanged := false;
			aliasesDefaultChanged := false))

val () = Slave.registerFileHandler (fn fs =>
				       let
					   val spl = OS.Path.splitDirFile (#file fs)
				       in
					   if #file spl = "aliases" then
					       aliasesChanged := true
					   else if #file spl = "aliases.default" then
					       aliasesDefaultChanged := true
					   else
					       ()
				       end)

val () = Slave.registerPostHandler
	 (fn () =>
	     (if !aliasesChanged then
		  Slave.concatTo (fn s => s = "aliases") Config.Exim.aliases
	      else
		  ();
	      if !aliasesDefaultChanged then
		  Slave.concatTo (fn s => s = "aliases.default") Config.Exim.aliasesDefault
	      else
		  ();
	      if !aliasesChanged orelse !aliasesDefaultChanged then
		  Slave.shellF ([Config.Exim.reload],
				fn cl => "Error reloading exim with " ^ cl)
	      else
		  ()))

end