HCoop / hcoop / domtool2.git / blame
| 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 | ||
| f296c496 CE |
29 | fun info name = |
| 30 | if not (validName name) then | |
| 31 | NONE | |
| 32 | else | |
| 33 | let | |
| 34 | val proc = Unix.execute ("/usr/bin/apt-cache", ["show", name]) | |
| 35 | val inf = Unix.textInstreamOf proc | |
| 36 | ||
| 37 | val _ = TextIO.inputLine inf (* in every let* lies an imperative program in disguise *) | |
| 38 | ||
| 39 | fun loop (section, descr) = | |
| 40 | case TextIO.inputLine inf of | |
| 41 | NONE => (section, descr) | |
| 42 | | SOME line => | |
| 43 | if size line >= 9 andalso String.substring (line, 0, 9) = "Section: " then | |
| 44 | loop (SOME (String.substring (line, 9, size line - 10)), descr) | |
| 45 | else if size line >= 13 andalso String.substring (line, 0, 13) = "Description: " then | |
| 46 | loop (section, SOME (String.substring (line, 13, size line - 14))) | |
| 6f1dbd13 CE |
47 | else if size line >= 16 andalso String.substring (line, 0, 16) = "Description-en: " then |
| 48 | loop (section, SOME (String.substring (line, 16, size line - 17))) | |
| f296c496 CE |
49 | else |
| 50 | loop (section, descr) | |
| 51 | in | |
| 52 | (case loop (NONE, NONE) of | |
| 53 | (SOME section, SOME descr) => SOME {section = section, description = descr} | |
| 54 | | _ => NONE) | |
| 55 | before ignore (Unix.reap proc) | |
| 56 | end | |
| 75585a67 AC |
57 | |
| 58 | fun installed name = | |
| 59 | validName name | |
| a378e688 AC |
60 | andalso let |
| 61 | val proc = Unix.execute ("/usr/bin/apt-cache", ["policy", name]) | |
| 62 | val inf = Unix.textInstreamOf proc | |
| 63 | ||
| 64 | val _ = TextIO.inputLine inf | |
| 65 | in | |
| 66 | (case TextIO.inputLine inf of | |
| 67 | NONE => false | |
| 68 | | SOME line => | |
| 69 | case String.tokens Char.isSpace line of | |
| 70 | [_, "(none)"] => false | |
| 71 | | [_, _] => true | |
| 72 | | _ => false) | |
| 73 | before ignore (Unix.reap proc) | |
| 74 | end | |
| 75585a67 AC |
75 | |
| 76 | end |