112 lines
4.9 KiB
HTML
112 lines
4.9 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual describes ASDF, a system definition facility
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for Common Lisp programs and libraries.
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You can find the latest version of this manual at
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https://common-lisp.net/project/asdf/asdf.html.
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ASDF Copyright (C) 2001-2019 Daniel Barlow and contributors.
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This manual Copyright (C) 2001-2019 Daniel Barlow and contributors.
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This manual revised (C) 2009-2019 Robert P. Goldman and Francois-Rene Rideau.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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<title>ASDF can be upgraded (ASDF Manual)</title>
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<meta name="description" content="ASDF can be upgraded (ASDF Manual)">
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<meta name="keywords" content="ASDF can be upgraded (ASDF Manual)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="What-has-changed-between-ASDF-1-ASDF-2-and-ASDF-3_003f.html" rel="up" title="What has changed between ASDF 1 ASDF 2 and ASDF 3?">
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<link href="Decoupled-release-cycle.html" rel="next" title="Decoupled release cycle">
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<link href="ASDF-itself-is-versioned.html" rel="prev" title="ASDF itself is versioned">
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</head>
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<body lang="en">
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<div class="subsection" id="ASDF-can-be-upgraded">
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<div class="header">
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<p>
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Next: <a href="Decoupled-release-cycle.html" accesskey="n" rel="next">Decoupled release cycle</a>, Previous: <a href="ASDF-itself-is-versioned.html" accesskey="p" rel="prev">ASDF itself is versioned</a>, Up: <a href="What-has-changed-between-ASDF-1-ASDF-2-and-ASDF-3_003f.html" accesskey="u" rel="up">“What has changed between ASDF 1, ASDF 2, and ASDF 3?”</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<span id="ASDF-can-be-upgraded-1"></span><h4 class="subsection">13.3.9 ASDF can be upgraded</h4>
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<p>When an old version of ASDF was loaded,
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it was very hard to upgrade ASDF in your current image
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without breaking everything.
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Instead you had to exit the Lisp process and
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somehow arrange to start a new one from a simpler image.
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Something that can’t be done from within Lisp,
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making automation of it difficult,
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which compounded with difficulty in configuration,
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made the task quite hard.
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Yet as we saw before, the task would have been required
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to not have to live with the worst case or non-portable
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subset of ASDF features.
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</p>
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<p>With ASDF 2, it is easy to upgrade
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from ASDF 2 to later versions from within Lisp,
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and not too hard to upgrade from ASDF 1 to ASDF 2 from within Lisp.
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We support hot upgrade of ASDF and any breakage is a bug
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that we will do our best to fix.
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There are still limitations on upgrade, though,
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most notably the fact that after you upgrade ASDF,
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you must also reload or upgrade all ASDF extensions.
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</p>
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</div>
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</body>
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</html>
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