X-Git-Url: https://git.hcoop.net/hcoop/domtool2.git/blobdiff_plain/d189ec0eee8569e5811335e7fc93a921e14c2b1f..d612d62cd04b713bb1057fd2e666365704aaf3d6:/src/slave.sml

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+(* 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.
+ *)
+
+(* Code for receiving and executing configuration files *)
+
+structure Slave :> SLAVE = struct
+
+datatype file_action =
+	 Add
+       | Delete
+       | Modify
+
+type file_status = {action : file_action,
+		    domain : string,
+		    file : string}
+		   
+val fileHandler = ref (fn _ : file_status => ())
+val preHandler = ref (fn () => ())
+val postHandler = ref (fn () => ())
+		  
+fun registerFileHandler handler =
+    let
+	val old = !fileHandler
+    in
+	fileHandler := (fn x => (handler x; old x))
+    end
+
+fun registerPreHandler handler =
+    let
+	val old = !preHandler
+    in
+	preHandler := (fn () => (handler (); old ()))
+    end
+
+fun registerPostHandler handler =
+    let
+	val old = !postHandler
+    in
+	postHandler := (fn () => (handler (); old ()))
+    end
+
+fun handleChanges fs = (!preHandler ();
+			app (!fileHandler) fs;
+			!postHandler ())
+
+end