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<title>GLEP 50 -- Supporting alternative package managers</title>
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[<b><a href="http://www.gentoo.org/proj/en/glep">GLEP Index</a></b>]
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[<b><a href="http://www.gentoo.org/proj/en/glep/glep-0050.txt">GLEP Source</a></b>]
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<tr class="field"><th class="field-name">GLEP:</th><td class="field-body">50</td>
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</tr>
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<tr class="field"><th class="field-name">Title:</th><td class="field-body">Supporting alternative package managers</td>
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</tr>
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<tr class="field"><th class="field-name">Version:</th><td class="field-body">1.3</td>
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</tr>
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<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-0050.txt?cvsroot=gentoo">2006/09/05 20:54:30</a></td>
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</tr>
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<tr class="field"><th class="field-name">Author:</th><td class="field-body">Grant Goodyear <g2boojum at gentoo.org></td>
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</tr>
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<tr class="field"><th class="field-name">Status:</th><td class="field-body">Rejected</td>
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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">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-May-2006</td>
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</tr>
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<tr class="field"><th class="field-name">Post-History:</th><td class="field-body">15-Jun-2006, 6-Sep-2006</td>
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</tr>
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</tbody>
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</table>
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<hr />
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<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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<ul class="simple">
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<li><a class="reference" href="#status" id="id2" name="id2">Status</a></li>
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<li><a class="reference" href="#abstract" id="id3" name="id3">Abstract</a></li>
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<li><a class="reference" href="#specification" id="id4" name="id4">Specification</a></li>
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<li><a class="reference" href="#rationale" id="id5" name="id5">Rationale</a></li>
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<li><a class="reference" href="#notes" id="id6" name="id6">Notes</a></li>
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<li><a class="reference" href="#backwards-compatibility" id="id7" name="id7">Backwards Compatibility</a></li>
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<li><a class="reference" href="#copyright" id="id8" name="id8">Copyright</a></li>
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</ul>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id2" id="status" name="status">Status</a></h1>
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<p>The council rejected this GLEP in favor of starting from a package manager
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API and requiring Gentoo package managers in the tree to support that
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API. (That API is still pending, however.)</p>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id3" id="abstract" name="abstract">Abstract</a></h1>
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<p>To support alternatives to the official package manager (portage, at the time
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of this writing), some sane ground rules need to be set. Specifically, no
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alternative ebuild-based package manager may be added to the tree unless it
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successfully works with all ebuilds supported by the official package manager.
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Moreover, no ebuilds may be added to the tree unless they are supported
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(without change) by the official package manager.</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="specification" name="specification">Specification</a></h1>
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<ul class="simple">
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<li>No alternative ebuild-based package manager may be added
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to the tree unless it successfully works with all ebuilds supported by
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the official package manager. If an alternative package manager is
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runtime incompatible with the official package manager, then it
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must be masked and provide appropriate warnings.</li>
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<li>No ebuilds may be added to the tree unless they are supported
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(without change) by the official package manager.</li>
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</ul>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id5" id="rationale" name="rationale">Rationale</a></h1>
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<p>The first rule sets a reasonable bar for adding an alternative package
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manager to the tree. Note that if an ebuild currently in the tree
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doesn't work with the official package manager, it isn't expected to
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work with an alternative package manager either. The second rule
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ensures that an alternative package manager cannot become a de-facto
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requirement by supporting packages that the official package manager
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cannot handle.</p>
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<p>In order to keep this proposal as simple and focused as possible, it has
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nothing to say about the process by which an alternative package manager
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might one day become the official package manager. It is assumed that
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sanity will reign, and no package manager will become official without
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being able to build installation media, providing a transition path from
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or to the existing official package manager, etcetera.</p>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id6" id="notes" name="notes">Notes</a></h1>
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<ul class="simple">
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<li>An early criticism of this GLEP was that it fails to address eclasses and
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profiles. As far as eclasses are concerned, my view is that the above rules
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suffice, since eclasses only matter in their use in ebuilds. If a package
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manager can effectively process all ebuilds, then it must be handling the
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eclasses successfully, too. Profiles, on the other hand, are not addressed
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here even implicitly.</li>
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<li>Assuming the ebuild specification is successfully finished, then the
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first rule should really replace "all ebuilds supported by the official
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package manager" with "all ebuilds that satisfy the ebuild spec".
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Similarly, in rule two "by the official package manager" should
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read "by the official ebuild spec".</li>
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</ul>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id7" id="backwards-compatibility" name="backwards-compatibility">Backwards Compatibility</a></h1>
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<p>Pretty much the whole point, and it's explicit here.</p>
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</div>
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<div class="section">
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<h1><a class="toc-backref" href="#id8" id="copyright" name="copyright">Copyright</a></h1>
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<p>This document has been placed in the public domain.</p>
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