Commit | Line | Data |
---|---|---|
d612d62c AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | *) | |
18 | ||
19 | (* Code for receiving and executing configuration files *) | |
20 | ||
21 | structure Slave :> SLAVE = struct | |
22 | ||
23 | datatype file_action = | |
24 | Add | |
25 | | Delete | |
26 | | Modify | |
27 | ||
28 | type file_status = {action : file_action, | |
29 | domain : string, | |
30 | file : string} | |
31 | ||
32 | val fileHandler = ref (fn _ : file_status => ()) | |
33 | val preHandler = ref (fn () => ()) | |
34 | val postHandler = ref (fn () => ()) | |
35 | ||
36 | fun registerFileHandler handler = | |
37 | let | |
38 | val old = !fileHandler | |
39 | in | |
40 | fileHandler := (fn x => (handler x; old x)) | |
41 | end | |
42 | ||
43 | fun registerPreHandler handler = | |
44 | let | |
45 | val old = !preHandler | |
46 | in | |
47 | preHandler := (fn () => (handler (); old ())) | |
48 | end | |
49 | ||
50 | fun registerPostHandler handler = | |
51 | let | |
52 | val old = !postHandler | |
53 | in | |
54 | postHandler := (fn () => (handler (); old ())) | |
55 | end | |
56 | ||
57 | fun handleChanges fs = (!preHandler (); | |
58 | app (!fileHandler) fs; | |
59 | !postHandler ()) | |
60 | ||
61 | end |