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12 <title>GLEP 19 -- Gentoo Stable Portage Tree</title>
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29 <col class="field-name" />
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32 <tr class="field"><th class="field-name">GLEP:</th><td class="field-body">19</td>
33 </tr>
34 <tr class="field"><th class="field-name">Title:</th><td class="field-body">Gentoo Stable Portage Tree</td>
35 </tr>
36 <tr class="field"><th class="field-name">Version:</th><td class="field-body">1.4</td>
37 </tr>
38 <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-0019.txt?cvsroot=gentoo">2004/01/30 02:41:45</a></td>
39 </tr>
40 <tr class="field"><th class="field-name">Author:</th><td class="field-body">Kurt Lieber &lt;klieber&#32;&#97;t&#32;gentoo.org&gt;</td>
41 </tr>
42 <tr class="field"><th class="field-name">Status:</th><td class="field-body">Draft</td>
43 </tr>
44 <tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td>
45 </tr>
46 <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>
47 </tr>
48 <tr class="field"><th class="field-name">Created:</th><td class="field-body">26-Jan-2004</td>
49 </tr>
50 <tr class="field"><th class="field-name">Post-History:</th><td class="field-body">29-Jan-2004</td>
51 </tr>
52 </tbody>
53 </table>
54 <hr />
55 <div class="contents topic" id="contents">
56 <p class="topic-title"><a name="contents">Contents</a></p>
57 <ul class="simple">
58 <li><a class="reference" href="#abstract" id="id2" name="id2">Abstract</a></li>
59 <li><a class="reference" href="#motivation" id="id3" name="id3">Motivation</a></li>
60 <li><a class="reference" href="#specification" id="id4" name="id4">Specification</a></li>
61 <li><a class="reference" href="#rationale" id="id5" name="id5">Rationale</a></li>
62 <li><a class="reference" href="#implementation" id="id6" name="id6">Implementation</a></li>
63 <li><a class="reference" href="#backwards-compatibility" id="id7" name="id7">Backwards Compatibility</a></li>
64 <li><a class="reference" href="#copyright" id="id8" name="id8">Copyright</a></li>
65 </ul>
66 </div>
67 <div class="section" id="abstract">
68 <h1><a class="toc-backref" href="#id2" name="abstract">Abstract</a></h1>
69 <p>This GLEP is intended to propose a series of changes to the Portage tree that
70 are necessary to facilitate the use of Gentoo in areas where stability and
71 predictability are of paramount importance, including servers in enterprise
72 environments, mission critical workstations and other such installations.</p>
73 <p>The proposed solution involves creating a separate tree in Portage that is
74 updated far less often than the regular tree. Outside of periodic updates,
75 this tree would only be updated with critical bugfixes and security patches.</p>
76 </div>
77 <div class="section" id="motivation">
78 <h1><a class="toc-backref" href="#id3" name="motivation">Motivation</a></h1>
79 <p>Enterprise users typically value stability and a predictable upgrade path
80 over having the latest packages or features available to them. Historically,
81 Gentoo Linux has been unable to provide such an environment due to the dynamic
82 nature of the Portage tree.</p>
83 </div>
84 <div class="section" id="specification">
85 <h1><a class="toc-backref" href="#id4" name="specification">Specification</a></h1>
86 <p>The Gentoo Infrastructure team will need to provide an additional Portage tree
87 on our rsync mirroring system. This new tree will house the ebuilds
88 associated with the stable tree. It also impacts all Gentoo developers
89 responsible for creating and updating ebuilds as they will be expected to
90 integrate the tagging of ebuilds for the stable tree into their normal
91 development process, both for the quarterly release cycles as well as
92 off-cycle bug and security fixes.</p>
93 <p>The Gentoo Documentation team will also be affected as they will be
94 responsible for updating installation documents to take these new features
95 into account.</p>
96 </div>
97 <div class="section" id="rationale">
98 <h1><a class="toc-backref" href="#id5" name="rationale">Rationale</a></h1>
99 <p>A basic outline of various ways of adding a &quot;stable&quot; tree to Portage was
100 discussed in the gentoo managers meeting on 26-Jan-04. Consensus seemed to be
101 reached that such a solution was needed and that branching the gentoo-x86
102 repository was the appropriate way to accomplish this. The largest area of
103 disagreement surrounded how specific ebuilds should be targeted for inclusion
104 in the stable tree.</p>
105 <p>One suggested solution was a simple branch of the CVS tree and having
106 developers work in two separate branches; one for the stable tree and
107 another for the traditional tree. However, it was felt this would prove too
108 cumbersome in practice.</p>
109 <p>Another suggestion was to have a small group of dedicated gentoo-server
110 developers responsible for generating the contents of the stable tree, which
111 would provide more control and quality assurance over the ebuilds added to the
112 stable tree. While this might prove effective for a small number of ebuilds,
113 it is quite likely that this model would not scale enough to allow for a large
114 number of ebuilds in the stable tree and, over time, the project would become
115 resource constrained and unable to meed future deadlines.</p>
116 <p>The suggestion that seemed to get the most traction was the creation of a new
117 &quot;stable&quot; keyword which would be added to appropriate ebuilds. The use of
118 &quot;stable&quot; would signify ebuilds that are ready for production in the stable
119 tree while &quot;~stable&quot; would be reserved for ebuilds which may be appropriate
120 for the stable tree, but may require further testing before being deemed
121 &quot;ready for production&quot;. Off-cycle bug fixes and/or security updates may be
122 examples of ebuilds that require the ~stable tag.</p>
123 </div>
124 <div class="section" id="implementation">
125 <h1><a class="toc-backref" href="#id6" name="implementation">Implementation</a></h1>
126 <p>While a 'stable' keyword was originally proposed, after further review, it was
127 determined this offered no way to allow arch-specific stable ebuilds. As
128 such, this GLEP proposes the use of 'stable:&lt;arch&gt;' and '~stable:&lt;arch&gt;'
129 (stable:x86, stable:ppc, etc.)</p>
130 <p>A new, stable tree will be created by scanning for the 'stable:&lt;arch&gt;' and
131 '~stable:&lt;arch&gt;' keywords in the ebuilds and pulling those ebuilds and
132 associated files into a separate branch of CVS. The stable tree should have
133 the following features:</p>
134 <ul class="simple">
135 <li>Updated quarterly. Frozen during other times except for security/bug fixes</li>
136 <li>All ebuilds should remain in the tree for a minimum of one year. This
137 allows users to upgrade as infrequently as once per year without risking
138 the stable portage tree leaving them behind without an upgrade path.</li>
139 </ul>
140 <p>As mentioned above, the &quot;stable&quot; tree will be updated quarterly, ideally in
141 unison with the release schedule of the main Gentoo branch. This tree will be
142 untouched outside of this update schedule except in the following cases:</p>
143 <ul class="simple">
144 <li>Security fixes and patches which result in a GLSA</li>
145 <li>Bug fixes for bugs ranked as 'maj' or above (may be overridden at the
146 discretion of the package maintainer.)</li>
147 </ul>
148 <p>In both cases, the maintainer of the package will be responsible for ensuring
149 these patches are properly committed to the stable tree out of cycle.</p>
150 </div>
151 <div class="section" id="backwards-compatibility">
152 <h1><a class="toc-backref" href="#id7" name="backwards-compatibility">Backwards Compatibility</a></h1>
153 <p>All features proposed here are new additions to existing processes and
154 features. There should be no impact on existing features and functionality.</p>
155 </div>
156 <div class="section" id="copyright">
157 <h1><a class="toc-backref" href="#id8" name="copyright">Copyright</a></h1>
158 <p>This document is licensed under the Creative Commons - Attribution / Share
159 Alike license. (<a class="reference" href="http://creativecommons.org/licenses/by-sa/1.0">http://creativecommons.org/licenses/by-sa/1.0</a>)</p>
160 </div>
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