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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, |
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30 | dir : string, |
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31 | file : string} |
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32 | |
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33 | val fileHandler = ref (fn _ : file_status => ()) |
34 | val preHandler = ref (fn () => ()) |
35 | val postHandler = ref (fn () => ()) |
36 | |
37 | fun registerFileHandler handler = |
38 | let |
39 | val old = !fileHandler |
40 | in |
41 | fileHandler := (fn x => (handler x; old x)) |
42 | end |
43 | |
44 | fun registerPreHandler handler = |
45 | let |
46 | val old = !preHandler |
47 | in |
48 | preHandler := (fn () => (handler (); old ())) |
49 | end |
50 | |
51 | fun registerPostHandler handler = |
52 | let |
53 | val old = !postHandler |
54 | in |
55 | postHandler := (fn () => (handler (); old ())) |
56 | end |
57 | |
58 | fun handleChanges fs = (!preHandler (); |
59 | app (!fileHandler) fs; |
60 | !postHandler ()) |
61 | |
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62 | fun shell ss = OS.Process.isSuccess (OS.Process.system (String.concat ss)) |
63 | |
64 | fun shellF (ss, msg) = |
65 | let |
66 | val s = String.concat ss |
67 | in |
68 | if OS.Process.isSuccess (OS.Process.system s) then |
69 | () |
70 | else |
71 | ErrorMsg.error NONE (msg s) |
72 | end |
73 | |
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74 | fun hostname () = |
75 | let |
76 | val inf = TextIO.openIn "/etc/hostname" |
77 | in |
78 | case TextIO.inputLine inf of |
79 | NONE => (TextIO.closeIn inf; raise Fail "No line in /etc/hostname") |
80 | | SOME line => (TextIO.closeIn inf; String.substring (line, 0, size line - 1)) |
81 | end |
82 | |
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83 | fun concatTo p fname = |
84 | let |
85 | fun visitDir dname = |
86 | let |
87 | val dir = Posix.FileSys.opendir dname |
88 | |
89 | fun loop () = |
90 | case Posix.FileSys.readdir dir of |
91 | NONE => Posix.FileSys.closedir dir |
92 | | SOME fname' => |
93 | let |
94 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
95 | in |
96 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
97 | visitDir path |
98 | else if p fname' then |
99 | shellF ([Config.cat, " ", path, " >>", fname], |
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100 | fn cl => "Error concatenating: " ^ cl) |
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101 | else |
102 | (); |
103 | loop () |
104 | end |
105 | in |
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106 | loop () |
107 | end |
108 | in |
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109 | TextIO.closeOut (TextIO.openOut fname); |
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110 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}) |
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111 | end |
112 | |
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113 | fun enumerateTo p sep fname = |
114 | let |
115 | val outf = TextIO.openOut fname |
116 | |
117 | val first = ref true |
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118 | val baseLen = length (String.fields (fn ch => ch = #"/") Config.resultRoot) + 1 |
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119 | |
120 | fun visitDir dname = |
121 | let |
122 | val dir = Posix.FileSys.opendir dname |
123 | |
124 | fun loop () = |
125 | case Posix.FileSys.readdir dir of |
126 | NONE => Posix.FileSys.closedir dir |
127 | | SOME fname' => |
128 | let |
129 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
130 | in |
131 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
132 | visitDir path |
133 | else if p fname' then |
134 | let |
135 | val toks = String.fields (fn ch => ch = #"/") dname |
136 | val toks = List.drop (toks, baseLen) |
137 | val dom = String.concatWith "." (rev toks) |
138 | in |
139 | if !first then |
140 | first := false |
141 | else |
142 | TextIO.output (outf, sep); |
143 | TextIO.output (outf, dom) |
144 | end |
145 | else |
146 | (); |
147 | loop () |
148 | end |
149 | in |
150 | loop () |
151 | end |
152 | in |
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153 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}); |
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154 | TextIO.closeOut outf |
155 | end |
156 | |
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157 | fun readList fname = |
158 | let |
159 | val inf = TextIO.openIn fname |
160 | |
161 | fun loop acc = |
162 | case TextIO.inputLine inf of |
163 | NONE => rev acc |
164 | | SOME line => loop (String.substring (line, 0, size line - 1) :: acc) |
165 | in |
166 | loop [] |
167 | before TextIO.closeIn inf |
168 | end |
169 | |
170 | fun writeList (fname, ls) = |
171 | let |
172 | val outf = TextIO.openOut fname |
173 | in |
174 | app (fn s => (TextIO.output (outf, s); |
175 | TextIO.output1 (outf, #"\n"))) ls; |
176 | TextIO.closeOut outf |
177 | end |
178 | |
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179 | end |