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<title>debtree - Package dependency graphs</title>
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<h1>debtree — package dependency graphs on steroids</h1>
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<h3><a href="index.html">Introduction</a></h3>
<h3>Example: debconf</h3>
<ol start="0">
<li><a href="debconf0.html">Graph from apt-cache (for comparison)</a></li>
<li><a href="debconf1.html">Basic graph (only hard dependencies and conflicts)</a></li>
<li><a href="debconf2.html">Basic graph with Recommends</a></li>
<li><a href="debconf3.html">Basic graph with Recommends and Suggests</a></li>
<li><a href="debconf4.html">Basic graph with Recommends and showing alternatives</a></li>
<li><a href="debconf5.html">Default graph (showing Recommends, alternatives and versions)</a></li>
<li><a href="debconf6.html">Default graph with Suggests</a></li>
<li><b>Default graph with Suggests and versioned Conflicts</b></li>
<li><a href="debconf8.html">Default graph (rotated)</a></li>
</ol>
<hr />
<p>
Note the nice relationships around <tt>whiptail</tt> etc. with again the
Suggests a single arrow, but the Conflicts and Provides showing the correct
individual relationships.
</p><p>
The versioned conflicts from <tt>perl-base</tt> are hard to miss...
</p><p>
This graph could be extended even further.
The <tt>no-skip</tt> and <tt>show-all</tt> options can be used to also show
packages that by default are excluded or for which the dependencies are not
expanded. However, in a lot of cases this will only reduce the usability of
the graph. (Although in the case of debconf the result with
<tt>-S -VC --show-all</tt> is still quite nice.)
</p><p>
It is more likely that you'll want additional packages to be excluded or not
expanded because the graph is too big or complex. The contents of a graph can
be limited by:
</p>
<ul>
<li>
including less information, for example by not showing recommended packages
or conflicts, or using the <tt>show-installed</tt> option;
</li><li>
limiting the depth of the graph (note that with limit lower than 3 or 4 the
result will probably not be very useful);
</li><li>
adding packages to one of the configuration files in <tt>/etc/debtree/</tt>;
</li><li>
some combination of these methods.
</li>
</ul>
<p>
Some packages, especially meta packages like <tt>kde</tt>, have such a large
number of dependencies that it is almost impossible to produce a useful graph.
</p>
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<td width="10" />
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<p><tt><font size="-1">
$ debtree --with-suggests --versioned-conflicts debconf
</font></tt></p>
<hr />
<img src="thumbs/debconf7.png" alt="Dependency graph for debconf" />
<hr />
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<td>Generated .dot file:</td>
<td><a href="debconf7.dot" target="_blank">DOT</a></td>
</tr><tr>
<td>Full-sized images:</td>
<td><a href="debconf7.ps" target="_blank">PS</a> | PNG | <a href="debconf7.svg" target="_blank">SVG</a></td>
</tr>
</table>
<p><font size="-1"><a href="aptitude7.html">Equivalent graph for aptitude</a></font></p>
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