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12 <title>GLEP 54 -- An "old-school" metastructure proposal with "boot for being a slacker" Part II</title> 8 <title>GLEP 54 -- scm package version suffix</title>
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31<tr class="field"><th class="field-name">GLEP:</th><td class="field-body">54</td> 26<tr class="field"><th class="field-name">GLEP:</th><td class="field-body">54</td>
32</tr> 27</tr>
33<tr class="field"><th class="field-name">Title:</th><td class="field-body">An &quot;old-school&quot; metastructure proposal with &quot;boot for being a slacker&quot; Part II</td> 28<tr class="field"><th class="field-name">Title:</th><td class="field-body">scm package version suffix</td>
34</tr> 29</tr>
35<tr class="field"><th class="field-name">Version:</th><td class="field-body">1.1</td> 30<tr class="field"><th class="field-name">Version:</th><td class="field-body">1.5</td>
36</tr> 31</tr>
37<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-0054.txt?cvsroot=gentoo">2007/07/22 10:03:18</a></td> 32<tr class="field"><th class="field-name">Last-Modified:</th><td class="field-body"><a class="reference external" href="http://www.gentoo.org/cgi-bin/viewcvs.cgi/xml/htdocs/proj/en/glep/glep-0054.txt?cvsroot=gentoo">2008/01/06 02:08:59</a></td>
38</tr> 33</tr>
39<tr class="field"><th class="field-name">Author:</th><td class="field-body">Alec Warner &lt;antarus&#32;&#97;t&#32;gentoo.org&gt;</td> 34<tr class="field"><th class="field-name">Author:</th><td class="field-body">Piotr JaroszyƄski &lt;peper&#32;&#97;t&#32;gentoo.org&gt;</td>
40</tr> 35</tr>
41<tr class="field"><th class="field-name">Status:</th><td class="field-body">Final</td> 36<tr class="field"><th class="field-name">Status:</th><td class="field-body">Draft</td>
42</tr> 37</tr>
43<tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td> 38<tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td>
44</tr> 39</tr>
45<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> 40<tr class="field"><th class="field-name">Content-Type:</th><td class="field-body"><a class="reference external" href="glep-0002.html">text/x-rst</a></td>
46</tr> 41</tr>
47<tr class="field"><th class="field-name">Created:</th><td class="field-body">11-Oct-2007</td> 42<tr class="field"><th class="field-name">Created:</th><td class="field-body">09-Dec-2007</td>
48</tr> 43</tr>
49<tr class="field"><th class="field-name">Post-History:</th><td class="field-body">11-Oct-2007</td> 44<tr class="field"><th class="field-name">Post-History:</th><td class="field-body">09-Dec-2007</td>
50</tr> 45</tr>
51</tbody> 46</tbody>
52</table> 47</table>
53<hr /> 48<hr />
54<div class="contents topic"> 49<div class="contents topic" id="contents">
55<p class="topic-title first"><a id="contents" name="contents">Contents</a></p> 50<p class="topic-title first">Contents</p>
56<ul class="simple"> 51<ul class="simple">
57<li><a class="reference" href="#abstract" id="id2" name="id2">Abstract</a></li> 52<li><a class="reference internal" href="#abstract" id="id2">Abstract</a></li>
58<li><a class="reference" href="#motivation" id="id3" name="id3">Motivation</a></li> 53<li><a class="reference internal" href="#motivation" id="id3">Motivation</a></li>
59<li><a class="reference" href="#rationale" id="id4" name="id4">Rationale</a></li> 54<li><a class="reference internal" href="#specification" id="id4">Specification</a></li>
55<li><a class="reference internal" href="#version-comparison" id="id5">Version Comparison</a></li>
60<li><a class="reference" href="#backwards-compatibility" id="id5" name="id5">Backwards Compatibility</a></li> 56<li><a class="reference internal" href="#backwards-compatibility" id="id6">Backwards Compatibility</a></li>
61<li><a class="reference" href="#specification" id="id6" name="id6">Specification</a></li>
62<li><a class="reference" href="#copyright" id="id7" name="id7">Copyright</a></li> 57<li><a class="reference internal" href="#copyright" id="id7">Copyright</a></li>
63</ul> 58</ul>
64</div> 59</div>
65<div class="section"> 60<div class="section" id="abstract">
66<h1><a class="toc-backref" href="#id2" id="abstract" name="abstract">Abstract</a></h1> 61<h1><a class="toc-backref" href="#id2">Abstract</a></h1>
67<p>This GLEP amends GLEP 39[#GLEP39]_. A new project must be announced 62<p>This GLEP proposes addition of a new special package version suffix - <tt class="docutils literal">scm</tt> -
68to the community prior to it's conception. The announcement should state 63for ebuilds checking out source directly from a source code management system.</p>
69the project goals, the plan to achieve those goals, and any other information
70deemed useful to the community by the person proposing a new project.</p>
71</div> 64</div>
72<div class="section"> 65<div class="section" id="motivation">
73<h1><a class="toc-backref" href="#id3" id="motivation" name="motivation">Motivation</a></h1> 66<h1><a class="toc-backref" href="#id3">Motivation</a></h1>
74<p>Projects were being started behind the scenes that people were not aware of; 67<p>Currently there is no standard way of identifying SCM ebuilds. Using 9999 as the
75this included developers and users alike. It was thought important to notify 68version is pretty common, but it is handled like any other ebuild and hence
76the community of new projects. This also enables new projects to get valuable 69portage cannot provide any additional features for packages with such a version.
77feedback before getting to far into design and implementation.</p> 70Another way is adding a separate package with a -cvs suffix in its name, but
71that forces the author to use <tt class="docutils literal">|| ( cat/pkg <span class="pre">cat/pkg-cvs</span> )</tt> dependencies. The
72closest to what is proposed in this GLEP is the <tt class="docutils literal">cvs</tt> version part, but its
73implementation is of very limited use. It has strange comparison rules, no
74documentation, has been used sparingly (if ever) and has a misleading name.</p>
75<p>The possibility for package managers to recognise SCM ebuilds would allow them
76to add features dedicated specially to said ebuilds. One such feature could be
77automatic re-installation of SCM packages once a day or week. Any
78specifications for such features are beyond the scope of this GLEP.</p>
78</div> 79</div>
79<div class="section"> 80<div class="section" id="specification">
80<h1><a class="toc-backref" href="#id4" id="rationale" name="rationale">Rationale</a></h1> 81<h1><a class="toc-backref" href="#id4">Specification</a></h1>
81<p>We hope projects receiving feedback fare better in the long run with regards 82<p><tt class="docutils literal">scm</tt> is a special suffix. It can be used on its own, but also in any other
82to general reception as well as meeting the goals set forth in their 83valid version spec, just before the place where revision would go. And just like
83announcement. We hope projects announced early get more volunteers by virtue 84revision it can be used only once in a version spec, e.g.:</p>
84of being announced and in the community's view.</p> 85<blockquote>
86<ul class="simple">
87<li><tt class="docutils literal"><span class="pre">cat/pkg-1.0_alpha0-scm</span></tt></li>
88<li><tt class="docutils literal"><span class="pre">cat/pkg-1.0_alpha-scm</span></tt></li>
89<li><tt class="docutils literal"><span class="pre">cat/pkg-1.0-scm-r3</span></tt></li>
90<li><tt class="docutils literal"><span class="pre">cat/pkg-1-scm</span></tt></li>
91<li><tt class="docutils literal"><span class="pre">cat/pkg-1-scm-r2</span></tt></li>
92<li><tt class="docutils literal"><span class="pre">cat/pkg-scm</span></tt></li>
95<p>These package atoms are sorted in ascending order (see <a class="reference internal" href="#version-comparison">Version Comparison</a>).</p>
85</div> 96</div>
86<div class="section"> 97<div class="section" id="version-comparison">
87<h1><a class="toc-backref" href="#id5" id="backwards-compatibility" name="backwards-compatibility">Backwards Compatibility</a></h1> 98<h1><a class="toc-backref" href="#id5">Version Comparison</a></h1>
88<p>Projects already announced before 19-Oct-2006 are not affected. Since this 99<p>The addition of the scm suffix yields changes in version comparison:</p>
89GLEP was authored nearly a year later, conceivably projects announced since 100<blockquote>
90then should retroactively send mail regarding their goals and means to achieve 101<ul class="simple">
91them if they have not done so already; otherwise they would be in breach of 102<li>When comparing version components from left to right the scm component has the
92policy set in 2006.</p> 103highest priority over other version components. Hence
104<tt class="docutils literal"><span class="pre">pkg-1_alpha-r3</span> &lt; <span class="pre">pkg-1-scm</span></tt>, 'scm' is greater than 'alpha-r3'.</li>
105<li>Current suffixes with no number part no longer default to zero if they are
106followed by an scm suffix. If that's the case the number part is considered
107to be of a maximum value. Hence <tt class="docutils literal"><span class="pre">1_alpha2-scm</span> &lt; <span class="pre">1_alpha-scm</span></tt>, but still
108<tt class="docutils literal">1_alpha == 1_alpha0</tt>. The rationale behind this choice is to allow
109multiple branches. For instance imagine a package with an alpha branch
110and multiple scm releases, as the following: <tt class="docutils literal"><span class="pre">alpha-scm</span></tt>,
111<tt class="docutils literal"><span class="pre">alpha2-scm</span></tt>, <tt class="docutils literal"><span class="pre">alpha3-scm</span></tt> and so forth. The desired outcome is
112for <tt class="docutils literal"><span class="pre">alpha-scm</span></tt> to be greater than all other branches of the same tree.</li>
115<p>Example parsing:</p>
118<li><dl class="first docutils">
119<dt><tt class="docutils literal"><span class="pre">cat/pkg-scm</span> &gt; <span class="pre">cat/pkg-1</span></tt></dt>
120<dd><p class="first last">When parsing from left to right the first difference is <tt class="docutils literal">scm</tt> and
121<tt class="docutils literal">1</tt>. <tt class="docutils literal"><span class="pre">cat/pkg-scm</span></tt> wins.</p>
125<li><dl class="first docutils">
126<dt><tt class="docutils literal"><span class="pre">cat/pkg-1-scm</span> &gt; <span class="pre">cat/pkg-1.0-scm</span></tt></dt>
127<dd><p class="first last">When parsing from left to right the first difference is <tt class="docutils literal">scm</tt> and
128<tt class="docutils literal">0</tt>. <tt class="docutils literal"><span class="pre">cat/pkg-1-scm</span></tt> wins.</p>
132<li><dl class="first docutils">
133<dt><tt class="docutils literal"><span class="pre">cat/pkg-1_alpha-scm</span> &gt; <span class="pre">cat/pkg-1_alpha1-scm</span></tt></dt>
134<dd><p class="first last">In the first package version <tt class="docutils literal">alpha</tt> doesn't have a number part <em>and</em>
135is followed by an <tt class="docutils literal">scm</tt> suffix, hence it is considered to have a maximum
136value as the number part. When parsing from left to right the first
137difference is the number part of the <tt class="docutils literal">alpha</tt> suffix. Maximum value
138yielded by the following <tt class="docutils literal">scm</tt> suffix wins with <tt class="docutils literal">1</tt>.</p>
144<p>List of version specs in ascending order:</p>
146<ul class="simple">
147<li><tt class="docutils literal">1</tt></li>
148<li><tt class="docutils literal"><span class="pre">1.1-scm</span></tt></li>
149<li><tt class="docutils literal"><span class="pre">1.2_alpha-scm</span></tt></li>
150<li><tt class="docutils literal">1.2_beta_p</tt></li>
151<li><tt class="docutils literal"><span class="pre">1.2_beta_p0-scm</span></tt></li>
152<li><tt class="docutils literal"><span class="pre">1.2_beta_p1-scm</span></tt></li>
153<li><tt class="docutils literal"><span class="pre">1.2_beta_p-scm</span></tt></li>
154<li><tt class="docutils literal"><span class="pre">1.2_beta1_p-scm</span></tt></li>
155<li><tt class="docutils literal">1.2_beta10</tt></li>
156<li><tt class="docutils literal"><span class="pre">1.2_beta10_p1-scm</span></tt></li>
157<li><tt class="docutils literal"><span class="pre">1.2_beta10-scm</span></tt></li>
158<li><tt class="docutils literal"><span class="pre">1.2_beta-scm</span></tt></li>
159<li><tt class="docutils literal">1.2</tt></li>
160<li><tt class="docutils literal"><span class="pre">1.2-scm</span></tt></li>
161<li><tt class="docutils literal"><span class="pre">1.2-scm-r1</span></tt></li>
162<li><tt class="docutils literal"><span class="pre">1-scm</span></tt></li>
163<li><tt class="docutils literal">10</tt></li>
164<li><tt class="docutils literal">scm</tt></li>
165<li><tt class="docutils literal"><span class="pre">scm-r3</span></tt></li>
93</div> 168</div>
94<div class="section"> 169<div class="section" id="backwards-compatibility">
95<h1><a class="toc-backref" href="#id6" id="specification" name="specification">Specification</a></h1> 170<h1><a class="toc-backref" href="#id6">Backwards Compatibility</a></h1>
96<p>New projects should send an Request For Comments mail to gentoo-dev (and 171<p>Portage versions prior to (included in 2007.0) don't handle arbitrary
97optionally gentoo-project) in order to received feedback from the Gentoo 172version suffixes and die during various tasks making portage hard or impossible
98community. Once the feedback has been received and changes incorportated into 173to use. Later versions just ignore them displaying warnings. Hence use of
99the goals and design (if any), the project team should send a mail to 174<tt class="docutils literal">scm</tt> suffixes in gentoo-x86 tree will probably have to wait till 2008.0
100gentoo-dev-announce (and optionally gentoo-announce) regarding it's launch.</p> 175release or later.</p>
101<p>The contents of the announcements is left intentionally vague as to not
102restrict the scope of projects, goals, and means. If announcement, projects,
103goals, or means end up being terrible; the authors of this GLEP fully expect
104the community to chew you out over it.</p>
105<p>This GLEP does not empower the community to kill a new project, even if everyone
106decides it sucks.</p>
107</div> 176</div>
108<div class="section"> 177<div class="section" id="copyright">
109<h1><a class="toc-backref" href="#id7" id="copyright" name="copyright">Copyright</a></h1> 178<h1><a class="toc-backref" href="#id7">Copyright</a></h1>
110<p>This document has been placed in the public domain.</p> 179<p>This document has been placed in the public domain.</p>
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