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<pre><a name="line-1"></a><span class='hs-comment'>{- arch-tag: Debian Package utilities main file
<a name="line-2"></a>Copyright (C) 2004 John Goerzen <jgoerzen@complete.org>
<a name="line-3"></a>
<a name="line-4"></a>This program is free software; you can redistribute it and/or modify
<a name="line-5"></a>it under the terms of the GNU General Public License as published by
<a name="line-6"></a>the Free Software Foundation; either version 2 of the License, or
<a name="line-7"></a>(at your option) any later version.
<a name="line-8"></a>
<a name="line-9"></a>This program is distributed in the hope that it will be useful,
<a name="line-10"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-11"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-12"></a>GNU General Public License for more details.
<a name="line-13"></a>
<a name="line-14"></a>You should have received a copy of the GNU General Public License
<a name="line-15"></a>along with this program; if not, write to the Free Software
<a name="line-16"></a>Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<a name="line-17"></a>-}</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-comment'>{- |
<a name="line-20"></a> Module : System.Debian
<a name="line-21"></a> Copyright : Copyright (C) 2004 John Goerzen
<a name="line-22"></a> License : GNU GPL, version 2 or above
<a name="line-23"></a>
<a name="line-24"></a> Maintainer : John Goerzen <jgoerzen@complete.org>
<a name="line-25"></a> Stability : provisional
<a name="line-26"></a> Portability: portable
<a name="line-27"></a>
<a name="line-28"></a>This module provides various helpful utilities for dealing with Debian
<a name="line-29"></a>files and programs.
<a name="line-30"></a>
<a name="line-31"></a>Written by John Goerzen, jgoerzen\@complete.org
<a name="line-32"></a>-}</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Debian</span> <span class='hs-layout'>(</span><span class='hs-comment'>-- * Control or Similar File Utilities</span>
<a name="line-35"></a> <span class='hs-conid'>ControlFile</span><span class='hs-layout'>,</span>
<a name="line-36"></a> <span class='hs-comment'>-- * Version Number Utilities</span>
<a name="line-37"></a> <span class='hs-conid'>DebVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>compareDebVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>checkDebVersion</span>
<a name="line-38"></a> <span class='hs-layout'>)</span>
<a name="line-39"></a> <span class='hs-keyword'>where</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Cmd</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Exit</span>
<a name="line-44"></a>
<a name="line-45"></a><a name="ControlFile"></a><span class='hs-comment'>{- | The type representing the contents of a Debian control file,
<a name="line-46"></a>or any control-like file (such as the output from apt-cache show, etc.) -}</span>
<a name="line-47"></a><a name="ControlFile"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ControlFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-48"></a>
<a name="line-49"></a><span class='hs-comment'>----------------------------------------------------------------------</span>
<a name="line-50"></a><span class='hs-comment'>-- VERSION NUMBERS</span>
<a name="line-51"></a><span class='hs-comment'>----------------------------------------------------------------------</span>
<a name="line-52"></a>
<a name="line-53"></a><a name="DebVersion"></a><span class='hs-comment'>{- | The type representing a Debian version number. This type is an instance
<a name="line-54"></a>of 'Prelude.Ord', but you can also use 'compareDebVersion' if you prefer. -}</span>
<a name="line-55"></a><a name="DebVersion"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DebVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DebVersion</span> <span class='hs-conid'>String</span>
<a name="line-56"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-57"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-conid'>DebVersion</span> <span class='hs-keyword'>where</span>
<a name="line-58"></a> <span class='hs-varid'>compare</span> <span class='hs-layout'>(</span><span class='hs-conid'>DebVersion</span> <span class='hs-varid'>v1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>DebVersion</span> <span class='hs-varid'>v2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-59"></a> <span class='hs-comment'>{- This is OK since compareDebVersion should always be the same. -}</span>
<a name="line-60"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>compareDebVersion</span> <span class='hs-varid'>v1</span> <span class='hs-varid'>v2</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="compareDebVersion"></a><span class='hs-comment'>{- | Compare the versions of two packages. -}</span>
<a name="line-63"></a><span class='hs-definition'>compareDebVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Ordering</span>
<a name="line-64"></a><span class='hs-definition'>compareDebVersion</span> <span class='hs-varid'>v1</span> <span class='hs-varid'>v2</span> <span class='hs-keyglyph'>=</span>
<a name="line-65"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>runit</span> <span class='hs-varid'>op</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkDebVersion</span> <span class='hs-varid'>v1</span> <span class='hs-varid'>op</span> <span class='hs-varid'>v2</span>
<a name="line-66"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>islt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runit</span> <span class='hs-str'>"lt"</span>
<a name="line-67"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>islt</span>
<a name="line-68"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>LT</span>
<a name="line-69"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>isgt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runit</span> <span class='hs-str'>"gt"</span>
<a name="line-70"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isgt</span>
<a name="line-71"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>GT</span>
<a name="line-72"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>EQ</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="checkDebVersion"></a><span class='hs-definition'>checkDebVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Version 1</span>
<a name="line-75"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Operator</span>
<a name="line-76"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Version 2</span>
<a name="line-77"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-78"></a><span class='hs-definition'>checkDebVersion</span> <span class='hs-varid'>v1</span> <span class='hs-varid'>op</span> <span class='hs-varid'>v2</span> <span class='hs-keyglyph'>=</span>
<a name="line-79"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>ec</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>rawSystem</span> <span class='hs-str'>"dpkg"</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"--compare-versions"</span><span class='hs-layout'>,</span> <span class='hs-varid'>v1</span><span class='hs-layout'>,</span> <span class='hs-varid'>op</span><span class='hs-layout'>,</span> <span class='hs-varid'>v2</span><span class='hs-keyglyph'>]</span>
<a name="line-80"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ec</span> <span class='hs-keyword'>of</span>
<a name="line-81"></a> <span class='hs-conid'>ExitSuccess</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-82"></a> <span class='hs-conid'>ExitFailure</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
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distrib
>
Fedora
>
14
>
x86_64
>
media
>
updates
>
by-pkgid
>
ec5844e219498f2057da8f8f3070d4a1
>
files
>
290
