Commit | Line | Data |
---|---|---|
75585a67 AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006-2007, 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 | (* APT package database querying *) | |
20 | ||
21 | structure Apt :> APT = struct | |
22 | ||
23 | fun validName s = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"_" orelse ch = #"-" orelse ch = #".") s | |
24 | andalso (size s > 0 andalso String.sub (s, 0) <> #"-") | |
991d8e66 CE |
25 | |
26 | (* Copyed from the portal, doesn't exactly go out this in the most | |
27 | direct way, or does it? *) | |
28 | ||
29 | fun exists name = | |
30 | validName name andalso let | |
31 | val proc = Unix.execute ("/usr/bin/apt-cache", ["show", name]) | |
32 | val inf = Unix.textInstreamOf proc | |
33 | ||
34 | val _ = TextIO.inputLine inf (* in every let* lies an imperative program in disguise *) | |
35 | ||
36 | fun loop _ = | |
37 | case TextIO.inputLine inf of | |
38 | NONE => false | |
39 | | SOME line => | |
40 | if size line >= 9 andalso String.substring (line, 0, 9) = "Section: " then | |
41 | true | |
42 | else if size line >= 13 andalso String.substring (line, 0, 13) = "Description: " then | |
43 | false | |
44 | else | |
45 | loop () | |
46 | in | |
47 | loop () | |
48 | before ignore (Unix.reap proc) | |
49 | end | |
75585a67 AC |
50 | |
51 | fun installed name = | |
52 | validName name | |
a378e688 AC |
53 | andalso let |
54 | val proc = Unix.execute ("/usr/bin/apt-cache", ["policy", name]) | |
55 | val inf = Unix.textInstreamOf proc | |
56 | ||
57 | val _ = TextIO.inputLine inf | |
58 | in | |
59 | (case TextIO.inputLine inf of | |
60 | NONE => false | |
61 | | SOME line => | |
62 | case String.tokens Char.isSpace line of | |
63 | [_, "(none)"] => false | |
64 | | [_, _] => true | |
65 | | _ => false) | |
66 | before ignore (Unix.reap proc) | |
67 | end | |
75585a67 AC |
68 | |
69 | end |