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@@ -5,8 +5,6 @@
<li><a href="howdoi.html#ccache">Use <code>ccache</code></a></li>
<li><a href="howdoi.html#distcc">Use <code>distcc</code></a></li>
- <li><a href="howdoi.html#defaultoptions">Specify default options</a></li>
- <li><a href="howdoi.html#removeunneeded">Remove unneeded packages</a></li>
<li><a href="howdoi.html#unmask">Unmask a Package</a></li>
<li><a href="howdoi.html#syncfromcvs">Sync from CVS</a></li>
<li><a href="howdoi.html#syncfromsnapshot">Sync from a Gentoo tree snapshot</a></li>
@@ -44,94 +42,6 @@ PATH="/usr/lib/distcc/bin:${PATH}"
-<h2 id="defaultoptions">Specify default options</h2>
-<p>Often users want to specify certain options by default. Common choices include:</p>
- <li><code>--log-level warning</code> (you should <strong>not</strong> use
- <code>silent</code> in this way -- warnings are warnings because you need
- to read them)</li>
- <li><code>--show-reasons summary</code></li>
- <li><code>--resume-command-template $HOME/.paludis-resume-XXXXXX</code></li>
- <li><code>--dl-reinstall-scm weekly</code></li>
-<p>You can either use a shell alias, or <code>export
- PALUDIS_OPTIONS="--options"</code> (in your environment, not in the
-configuration <code>bashrc</code>).</p>
-<h2 id="removeunneeded">Remove unneeded packages</h2>
-<p>Paludis has three ways of removing unused packages. You should <strong>always</strong>
-use <code>--pretend</code> and check the output before proceeding:</p>
- <dt><code>--uninstall-unused</code></dt>
- <dd>
- <p>For the purposes of <code>--uninstall-unused</code>, an installed package
- is <em>used</em> if any of these conditions are true:</p>
- <ul>
- <li>It is matched by any dependency specification in any repository's <code>system</code> or
- <code>world</code> set.</li>
- <li>It is depended upon by another used package.</li>
- </ul>
- <p>This action will therefore flag any packages that are no longer in use,
- for example because they were only pulled in by a package that is no longer
- installed, or because they were required by an old version of a package but
- no longer are.</p>
- </dd>
- <dt><code>--uninstall --with-unused-dependencies</code></dt>
- <dd>
- <p>This action will uninstall a package, along with any of its dependencies
- that will no longer be used once the target package is removed.</p>
- <p>This action is recursive, so if <code>foo</code> depends upon <code>bar</code>
- and <code>bar</code> depends upon <code>baz</code>, and if neither <code>bar</code>
- nor <code>baz</code> are otherwise required, uninstalling <code>foo</code> will
- also uninstall <code>bar</code> then <code>baz</code>.</p>
- </dd>
- <dt><code>--uninstall --with-dependencies</code></dt>
- <dd>
- <p>This action will uninstall a package, along with any other package that
- requires this package as a dependency. Again, this action is recursive.</p>
- </dd>
-<p>Some important notes:</p>
- <li>These actions rely upon a package's dependencies being correctly specified.
- They do not attempt to figure out whether a package has unlisted dependencies
- using devious trickery.</li>
- <li>These actions rely upon a package correctly using <code>USE</code> flags. If
- a package was built with, say, <code>-foo</code> whilst <code>libfoo</code> was
- installed, Paludis will not consider the package to require <code>libfoo</code>.
- Unfortunately, some people don't know how to use <code>autoconf</code> correctly,
- so this assumption is currently not entirely safe in all cases.</li>
- <li>Currently a package's build dependencies, as well as its runtime and post
- dependencies, are used when determining needed packages. Experimentation has
- shown that doing otherwise will lead to an awful lot of breakage -- in the future,
- if ebuild authors start being more careful, this behaviour may become
- controllable.</li>
- <li>For the case of any-of (<code>|| ( foo bar )</code>) dependencies, Paludis
- currently does the safe thing and assumes that all available options, if
- installed, are needed. This cannot be changed safely until ebuild authors stop
- abusing <code>|| ( )</code> -- this construct <em>should</em> only be used
- where the dependency can be switched at runtime, but unfortunately it is
- often used to mean "compile against one of these".</li>
<h2 id="unmask">Unmask a Package</h2>
<p>First, you need to determine how a package is masked. The easiest way to do