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This HTML is auto-generated. DO NOT EDIT THIS FILE! If you are writing a new
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PEP, see http://www.python.org/peps/pep-0001.html for instructions and links
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to templates. DO NOT USE THIS HTML FILE AS YOUR TEMPLATE!
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g2boojum |
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<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
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g2boojum |
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<title>GLEP 21 -- User-defined Package Sets</title>
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g2boojum |
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<style type="text/css">
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/*
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:Author: David Goodger
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:Contact: goodger@users.sourceforge.net
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:date: $Date: 2003/06/02 17:03:08 $
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:version: $Revision: 1.1 $
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:copyright: This stylesheet has been placed in the public domain.
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Default cascading style sheet for the PEP HTML output of Docutils.
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g2boojum |
1.1 |
</head>
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<body bgcolor="white">
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<table class="navigation" cellpadding="0" cellspacing="0"
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width="100%" border="0">
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<tr><td class="navicon" width="150" height="35">
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<a href="http://www.gentoo.org/" title="Gentoo Linux Home Page">
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<img src="http://www.gentoo.org/images/gentoo-new.gif" alt="[Gentoo]"
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border="0" width="150" height="35" /></a></td>
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<td class="textlinks" align="left">
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[<b><a href="http://www.gentoo.org/">Gentoo Linux Home</a></b>]
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g2boojum |
1.3 |
[<b><a href="http://www.gentoo.org/peps">GLEP Index</a></b>]
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g2boojum |
1.1 |
[<b><a href="http://www.gentoo.org/proj/en/glep/glep-0021.txt">GLEP Source</a></b>]
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</td></tr></table>
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g2boojum |
1.3 |
<table class="rfc2822 docutils field-list" frame="void" rules="none">
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g2boojum |
1.1 |
<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field"><th class="field-name">GLEP:</th><td class="field-body">21</td>
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</tr>
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<tr class="field"><th class="field-name">Title:</th><td class="field-body">User-defined Package Sets</td>
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</tr>
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g2boojum |
1.3 |
<tr class="field"><th class="field-name">Version:</th><td class="field-body">1.3</td>
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g2boojum |
1.1 |
</tr>
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g2boojum |
1.3 |
<tr class="field"><th class="field-name">Last-Modified:</th><td class="field-body"><a class="reference" href="http://www.gentoo.org/cgi-bin/viewcvs.cgi/xml/htdocs/proj/en/glep/glep-0021.txt?cvsroot=gentoo">2006/09/04 03:06:32</a></td>
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g2boojum |
1.1 |
</tr>
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g2boojum |
1.3 |
<tr class="field"><th class="field-name">Author:</th><td class="field-body">Tal Peer <coredumb at gentoo.org>,
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Alec Warner <antarus at gentoo.org></td>
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g2boojum |
1.1 |
</tr>
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<tr class="field"><th class="field-name">Status:</th><td class="field-body">Draft</td>
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</tr>
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<tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td>
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</tr>
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<tr class="field"><th class="field-name">Discussed-To:</th><td class="field-body"><a class="reference" href="mailto:gentoo-portage-dev@lists.gentoo.org">gentoo-portage-dev@lists.gentoo.org</a></td>
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</tr>
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<tr class="field"><th class="field-name">Content-Type:</th><td class="field-body"><a class="reference" href="glep-0002.html">text/x-rst</a></td>
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</tr>
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<tr class="field"><th class="field-name">Created:</th><td class="field-body">22-Feb-2004</td>
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</tr>
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g2boojum |
1.3 |
<tr class="field"><th class="field-name">Post-History:</th><td class="field-body">6-Mar-2004, 3-Sep-2006</td>
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g2boojum |
1.1 |
</tr>
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</tbody>
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</table>
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<hr />
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g2boojum |
1.3 |
<div class="contents topic">
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<p class="topic-title first"><a id="contents" name="contents">Contents</a></p>
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g2boojum |
1.1 |
<ul class="simple">
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g2boojum |
1.3 |
<li><a class="reference" href="#status" id="id3" name="id3">Status</a></li>
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| 304 |
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<li><a class="reference" href="#abstract" id="id4" name="id4">Abstract</a></li>
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| 305 |
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<li><a class="reference" href="#motivation" id="id5" name="id5">Motivation</a></li>
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| 306 |
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<li><a class="reference" href="#specification" id="id6" name="id6">Specification</a><ul>
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| 307 |
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<li><a class="reference" href="#using-user-defined-sets-with-emerge" id="id7" name="id7">Using User-defined Sets With Emerge</a></li>
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| 308 |
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<li><a class="reference" href="#compatibility-with-other-portage-features" id="id8" name="id8">Compatibility With Other Portage Features</a></li>
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g2boojum |
1.1 |
</ul>
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</li>
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g2boojum |
1.3 |
<li><a class="reference" href="#implementation" id="id9" name="id9">Implementation</a></li>
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| 312 |
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<li><a class="reference" href="#rationale" id="id10" name="id10">Rationale</a></li>
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| 313 |
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<li><a class="reference" href="#backwards-compatibility" id="id11" name="id11">Backwards Compatibility</a></li>
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| 314 |
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<li><a class="reference" href="#references" id="id12" name="id12">References</a></li>
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| 315 |
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<li><a class="reference" href="#copyright" id="id13" name="id13">Copyright</a></li>
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g2boojum |
1.1 |
</ul>
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</div>
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g2boojum |
1.3 |
<div class="section">
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<h1><a class="toc-backref" href="#id3" id="status" name="status">Status</a></h1>
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<p>Taken over by antarus.</p>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id4" id="abstract" name="abstract">Abstract</a></h1>
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| 324 |
g2boojum |
1.1 |
<p>In Portage, package sets (formerly known as 'classes' or 'targets')
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are mere groups of packages, grouped together to allow easier updating
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and handling of them. Currently it is impossible to define sets further
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than the two default ones: "system" and "world".</p>
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</div>
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1.3 |
<div class="section">
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| 330 |
|
|
<h1><a class="toc-backref" href="#id5" id="motivation" name="motivation">Motivation</a></h1>
|
| 331 |
g2boojum |
1.1 |
<p>Over the months, quite a few requests for user-defined sets were
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|
|
made by users and developers, either by posting bugs, messages to
|
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|
|
mailing lists or on IRC. Usually the response is that this is an
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|
|
awesome idea, but no one ever took the time to actually define it
|
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|
|
properly and implement it.</p>
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|
<p>This document offers a specification for the implementation of
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|
|
user-defined sets using configuration files similar to the current
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|
|
world/system sets use.</p>
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</div>
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g2boojum |
1.3 |
<div class="section">
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|
|
<h1><a class="toc-backref" href="#id6" id="specification" name="specification">Specification</a></h1>
|
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g2boojum |
1.1 |
<p>The proposed implementation uses a one file per set approach, meaning
|
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|
|
each package set is defined in a single file. All set definition files
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g2boojum |
1.3 |
will reside in a directory <tt class="docutils literal"><span class="pre">/etc/portage/sets/</span></tt> and each set's name
|
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g2boojum |
1.1 |
will be its file name. Therefore, if one defines a set in
|
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|
|
/etc/portage/sets/foo-set, the set name will be 'foo-set'. Usual
|
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|
|
package naming rules <a class="footnote-reference" href="#name-rules" id="id1" name="id1">[1]</a> also apply to sets.</p>
|
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|
|
<p>As it is impossible to create two or more files with identical names
|
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|
|
in the same directory, a theoretic conflict between two different sets
|
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|
|
sharing the same name is impossible. However, users may define a
|
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|
|
package set whose name conflicts with one more or packages (for ambiguity
|
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|
|
resolution, see below).</p>
|
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|
|
<p>Syntax for the package list file is the same as the world file syntax,
|
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|
|
as described in the Portage manpage <a class="footnote-reference" href="#portage-manpage" id="id2" name="id2">[2]</a>, with one
|
| 355 |
|
|
addition: sets may not be 'inherited' by other sets, only packages may
|
| 356 |
|
|
be listed. There is no limitation to the number of packages in a set
|
| 357 |
|
|
or to the number of sets a package may belong to.</p>
|
| 358 |
g2boojum |
1.3 |
<div class="section">
|
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|
|
<h2><a class="toc-backref" href="#id7" id="using-user-defined-sets-with-emerge" name="using-user-defined-sets-with-emerge">Using User-defined Sets With Emerge</a></h2>
|
| 360 |
g2boojum |
1.1 |
<p>The user-defined sets will be available either directly or using
|
| 361 |
|
|
the --package-set option, As in:</p>
|
| 362 |
|
|
<pre class="literal-block">
|
| 363 |
|
|
# Basically the same:
|
| 364 |
|
|
emerge foo-set
|
| 365 |
|
|
emerge --package-set foo-set
|
| 366 |
|
|
</pre>
|
| 367 |
|
|
<p>The --package-set option is introduced to bypass ambiguities, as
|
| 368 |
|
|
illustrated in the next example:</p>
|
| 369 |
|
|
<pre class="literal-block">
|
| 370 |
|
|
emerge foo # Where foo is both a set and a one or more
|
| 371 |
|
|
# existing packages. This will cause emerge to show
|
| 372 |
|
|
# the ambiguity, ask us to be more
|
| 373 |
|
|
# specific, and stop.
|
| 374 |
|
|
|
| 375 |
|
|
emerge --package-set foo # So we specify that what we actually
|
| 376 |
|
|
# meant was the package set.
|
| 377 |
|
|
|
| 378 |
|
|
emerge cat-bar/foo # Or we specify the exact package name.
|
| 379 |
|
|
</pre>
|
| 380 |
|
|
<p>When running emerge with the --pretend option, sets will be
|
| 381 |
|
|
expanded to the packages they are comprised off in the output, as with
|
| 382 |
|
|
the current system-defined sets.</p>
|
| 383 |
|
|
<p>Only one set may be passed to portage at time, and sets can not
|
| 384 |
|
|
be mixed with ordinary packages. Thus, the following snippets are
|
| 385 |
g2boojum |
1.3 |
all invalid and will result in an error (assuming <tt class="docutils literal"><span class="pre">foo-set</span></tt> and
|
| 386 |
|
|
<tt class="docutils literal"><span class="pre">bar-set</span></tt> are defined as sets):</p>
|
| 387 |
g2boojum |
1.1 |
<pre class="literal-block">
|
| 388 |
|
|
emerge foo-set glibc
|
| 389 |
|
|
emerge bar-set system
|
| 390 |
|
|
emerge world foo-set gcc
|
| 391 |
|
|
</pre>
|
| 392 |
|
|
</div>
|
| 393 |
g2boojum |
1.3 |
<div class="section">
|
| 394 |
|
|
<h2><a class="toc-backref" href="#id8" id="compatibility-with-other-portage-features" name="compatibility-with-other-portage-features">Compatibility With Other Portage Features</a></h2>
|
| 395 |
g2boojum |
1.1 |
<ul class="simple">
|
| 396 |
|
|
<li>Dependencies:
|
| 397 |
|
|
Package sets (both system-defined and user-defined) may not be
|
| 398 |
|
|
depended on by ordinary packages and eclasses.</li>
|
| 399 |
|
|
<li>package.mask:
|
| 400 |
g2boojum |
1.3 |
Masking a package set through the <tt class="docutils literal"><span class="pre">package.mask</span></tt> file is forbidden.
|
| 401 |
g2boojum |
1.2 |
In order to 'mask' a package set, one should move it away from the
|
| 402 |
|
|
sets directory.</li>
|
| 403 |
g2boojum |
1.1 |
<li>package.use:
|
| 404 |
g2boojum |
1.3 |
USE flags may not be defined for sets in the <tt class="docutils literal"><span class="pre">package.use</span></tt> file.</li>
|
| 405 |
g2boojum |
1.1 |
</ul>
|
| 406 |
|
|
</div>
|
| 407 |
|
|
</div>
|
| 408 |
g2boojum |
1.3 |
<div class="section">
|
| 409 |
|
|
<h1><a class="toc-backref" href="#id9" id="implementation" name="implementation">Implementation</a></h1>
|
| 410 |
g2boojum |
1.1 |
<p>The implementation of the package sets concept in Portage should be
|
| 411 |
|
|
mostly done in portage.py, and only the interface parts should be
|
| 412 |
|
|
added to emerge itself, to keep the separation between interface and
|
| 413 |
|
|
logic.</p>
|
| 414 |
|
|
<p>The amount of work needed for implementation is not trivial, but not
|
| 415 |
|
|
huge either.</p>
|
| 416 |
|
|
</div>
|
| 417 |
g2boojum |
1.3 |
<div class="section">
|
| 418 |
|
|
<h1><a class="toc-backref" href="#id10" id="rationale" name="rationale">Rationale</a></h1>
|
| 419 |
g2boojum |
1.1 |
<p>The one file per set approach makes it easy to list the sets which are
|
| 420 |
g2boojum |
1.3 |
defined on a system by just listing the <tt class="docutils literal"><span class="pre">/etc/portage/sets</span></tt>
|
| 421 |
g2boojum |
1.1 |
directory contents. Additionally, it makes the set lookup process more
|
| 422 |
|
|
efficient as it only requires to check if a file exists.</p>
|
| 423 |
|
|
<p>I chose the --package-set option over the --set option for explicitly
|
| 424 |
|
|
telling portage to emerge a set mostly because --set implies setting
|
| 425 |
|
|
an environment variable, or such.</p>
|
| 426 |
g2boojum |
1.3 |
<p>Allowing sets' USE flags to be manipulated through the <tt class="docutils literal"><span class="pre">package.use</span></tt>
|
| 427 |
g2boojum |
1.1 |
file would have done more harm than good, for several reasons:</p>
|
| 428 |
|
|
<ul class="simple">
|
| 429 |
|
|
<li>If a USE flag is turned on (i.e. 'foo') for a set and the same USE
|
| 430 |
|
|
flag is turned off (i.e. '-foo'), for a package which is part of
|
| 431 |
|
|
the set, it is unclear which setting should take precedence.</li>
|
| 432 |
|
|
<li>Similarly, if a USE flag is turned on for a set and the same USE flag
|
| 433 |
|
|
is turned off for a set that is a subset of the original set, it is
|
| 434 |
|
|
unclear which setting should take precedence.</li>
|
| 435 |
|
|
<li>If a USE flag is defined (either off or on) for a set and a package
|
| 436 |
|
|
that belongs in the set is to be emerged, it is unclear whether the
|
| 437 |
|
|
USE flag should be defined when emerging the package in question.</li>
|
| 438 |
|
|
</ul>
|
| 439 |
|
|
<p>Therefore, I have decided it would be better to disallow setting USE
|
| 440 |
|
|
flags for sets.</p>
|
| 441 |
|
|
</div>
|
| 442 |
g2boojum |
1.3 |
<div class="section">
|
| 443 |
|
|
<h1><a class="toc-backref" href="#id11" id="backwards-compatibility" name="backwards-compatibility">Backwards Compatibility</a></h1>
|
| 444 |
g2boojum |
1.1 |
<p>Backwards compatibility with the current situation, in which only two
|
| 445 |
|
|
system-defined sets exist can be kept in one of two ways:</p>
|
| 446 |
|
|
<ol class="arabic simple">
|
| 447 |
|
|
<li>Leaving the situation as is - the 'world' and 'system' sets are
|
| 448 |
|
|
hard-coded in Portage.</li>
|
| 449 |
|
|
<li>Distributing default 'system' and 'world' files under the
|
| 450 |
g2boojum |
1.3 |
<tt class="docutils literal"><span class="pre">/etc/portage/sets/</span></tt> directory.</li>
|
| 451 |
g2boojum |
1.1 |
</ol>
|
| 452 |
|
|
<p>Other than that, there are no other backwards compatibility concerns
|
| 453 |
|
|
involved.</p>
|
| 454 |
|
|
</div>
|
| 455 |
g2boojum |
1.3 |
<div class="section">
|
| 456 |
|
|
<h1><a class="toc-backref" href="#id12" id="references" name="references">References</a></h1>
|
| 457 |
|
|
<table class="docutils footnote" frame="void" id="name-rules" rules="none">
|
| 458 |
g2boojum |
1.1 |
<colgroup><col class="label" /><col /></colgroup>
|
| 459 |
|
|
<tbody valign="top">
|
| 460 |
|
|
<tr><td class="label"><a class="fn-backref" href="#id1" name="name-rules">[1]</a></td><td>Gentoo Linux Development Policy - Ebuild Policy
|
| 461 |
|
|
(<a class="reference" href="http://www.gentoo.org/doc/en/policy.xml#doc_chap3">http://www.gentoo.org/doc/en/policy.xml#doc_chap3</a>)</td></tr>
|
| 462 |
|
|
</tbody>
|
| 463 |
|
|
</table>
|
| 464 |
g2boojum |
1.3 |
<table class="docutils footnote" frame="void" id="portage-manpage" rules="none">
|
| 465 |
g2boojum |
1.1 |
<colgroup><col class="label" /><col /></colgroup>
|
| 466 |
|
|
<tbody valign="top">
|
| 467 |
|
|
<tr><td class="label"><a class="fn-backref" href="#id2" name="portage-manpage">[2]</a></td><td><a class="reference" href="http://www.gentoo.org/cgi-bin/viewcvs.cgi/portage/man/portage.5?root=gentoo-src">http://www.gentoo.org/cgi-bin/viewcvs.cgi/portage/man/portage.5?root=gentoo-src</a></td></tr>
|
| 468 |
|
|
</tbody>
|
| 469 |
|
|
</table>
|
| 470 |
|
|
</div>
|
| 471 |
g2boojum |
1.3 |
<div class="section">
|
| 472 |
|
|
<h1><a class="toc-backref" href="#id13" id="copyright" name="copyright">Copyright</a></h1>
|
| 473 |
g2boojum |
1.1 |
<p>This document has been placed in the public domain.</p>
|
| 474 |
|
|
</div>
|
| 475 |
g2boojum |
1.3 |
|
| 476 |
g2boojum |
1.1 |
</div>
|
| 477 |
|
|
<div class="footer">
|
| 478 |
g2boojum |
1.3 |
<hr class="footer" />
|
| 479 |
g2boojum |
1.1 |
<a class="reference" href="glep-0021.txt">View document source</a>.
|
| 480 |
g2boojum |
1.4 |
Generated on: 2006-10-10 20:23 UTC.
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g2boojum |
1.1 |
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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g2boojum |
1.3 |
|
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1.1 |
</div>
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</body>
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</html>
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