2006-09-11 04:19:00 +00:00
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the License. You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
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-->
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2001-08-06 14:32:46 +00:00
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<html>
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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2005-04-29 18:58:16 +00:00
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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
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2002-02-03 22:00:42 +00:00
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<title>DependSet Task</title>
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2001-08-06 14:32:46 +00:00
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</head>
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<body>
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<h2>DependSet</h2>
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2005-09-15 15:39:15 +00:00
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A task to manage arbitrary dependencies between resources.
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2001-08-06 14:32:46 +00:00
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<h3>Description</h3>
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2018-02-28 07:58:59 +01:00
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<p>The <code>dependset</code> task compares a set of sources with a set of target files. If any of
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the sources has been modified more recently than any of the target files, all of the target files
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are removed.</p>
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<p>Sources and target files are specified via
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nested <a href="../Types/resources.html#collection">Resource Collection</a>s; sources can be
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resources of any type, while targets are restricted to files only. At least one set of sources and
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one set of targets is required.</p>
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<p>Use a FileSet when you want to use wildcard include or exclude patterns and don't care about
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missing files. Use a FileList when you want to consider the non-existence of a file as if it were
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out of date. If there are any non-existing files in any source or target FileList, all target files
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will be removed.</p>
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<p>DependSet is useful to capture dependencies that are not or cannot be determined algorithmically.
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For example, the <code><style></code> task only compares the source XML file and XSLT
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stylesheet against the target file to determined whether to restyle the source.
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Using <code>dependset</code> you can extend this dependency checking to include a DTD or XSD file as
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well as other stylesheets imported by the main stylesheet.</p>
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2001-08-06 14:32:46 +00:00
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<h3>Parameters</h3>
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2018-02-28 07:58:59 +01:00
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<table class="attr">
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2008-12-03 16:53:33 +00:00
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<tr>
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<th>Attribute</th>
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<th>Description</th>
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<th>Required</th>
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2008-12-03 16:53:33 +00:00
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</tr>
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<tr>
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<td>verbose</td>
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<td>Makes the task list all deleted targets files and the reason why they get deleted.</td>
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<td>No</td>
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2008-12-03 16:53:33 +00:00
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</tr>
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</table>
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<h3>Parameters Specified as Nested Elements</h3>
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2005-09-15 15:39:15 +00:00
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<h4>sources</h4>
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2018-02-28 07:58:59 +01:00
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<p>The <code><sources></code> element is a <a href="../Types/resources.html#union">Union</a>
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into which arbitrary resource collections can be nested. <em>Since Apache Ant 1.7</em>
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2005-09-15 15:39:15 +00:00
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</p>
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2001-08-06 14:32:46 +00:00
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<h4>srcfileset</h4>
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2018-02-28 07:58:59 +01:00
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<p>The nested <code><srcfileset></code> element specifies
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a <a href="../Types/fileset.html">FileSet</a>. All files included in this fileset will be compared
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against all files included in all of the <code><targetfileset></code> filesets
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and <code><targetfilelist></code> filelists. Multiple <code><srcfileset></code>
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filesets may be specified.</p>
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2001-08-06 14:32:46 +00:00
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<h4>srcfilelist</h4>
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2018-02-28 07:58:59 +01:00
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<p>The nested <code><srcfilelist></code> element specifies
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a <a href="../Types/filelist.html">FileList</a>. All files included in this filelist will be
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compared against all files included in all of the <code><targetfileset></code> filesets
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and <code><targetfilelist></code> filelists. Multiple <code><srcfilelist></code>
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filelists may be specified.</p>
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2005-09-15 15:39:15 +00:00
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<h4>targets</h4>
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2018-03-04 15:17:41 +01:00
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<p><em>Since Ant 1.7</em></p>
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2018-02-28 07:58:59 +01:00
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<p>The <code><targets></code> element is a <a href="../using.html#path">Path</a> and thus can
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include any filesystem-based resource.</p>
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2001-08-06 14:32:46 +00:00
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<h4>targetfileset</h4>
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2018-02-28 07:58:59 +01:00
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<p>The nested <code><targetfileset></code> element specifies
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a <a href="../Types/fileset.html">FileSet</a>. All files included in this fileset will be compared
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against all files included in all of the <code><srcfileset></code> filesets
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and <code><sourcefilelist></code> filelists, and if any are older, they are all deleted.
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Multiple <code><targetfileset></code> filesets may be specified.</p>
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2001-08-06 14:32:46 +00:00
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<h4>targetfilelist</h4>
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2018-02-28 07:58:59 +01:00
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<p>The nested <code><targetfilelist></code> element specifies
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a <a href="../Types/filelist.html">FileList</a>. All files included in this filelist will be
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compared against all files included in all of the <code><srcfileset></code> filesets
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and <code><sourcefilelist></code> filelists, and if any are older, they are all deleted.
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Multiple <code><targetfilelist></code> filelists may be specified.</p>
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2001-08-06 14:32:46 +00:00
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<h3>Examples</h3>
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2018-02-09 06:54:03 +01:00
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<pre>
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<dependset>
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<srcfilelist
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dir = "${dtd.dir}"
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files = "paper.dtd,common.dtd"/>
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<srcfilelist
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dir = "${xsl.dir}"
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files = "common.xsl"/>
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<srcfilelist
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dir = "${basedir}"
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files = "build.xml"/>
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<targetfileset
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dir = "${output.dir}"
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includes = "**/*.html"/>
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</dependset></pre>
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<p>In this example derived HTML files in the ${output.dir} directory will be removed if any are
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out-of-date with respect to:</p>
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2001-08-30 13:23:14 +00:00
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<ol>
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<li>the DTD of their source XML files</li>
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<li>a common DTD (imported by the main DTD)</li>
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<li>a subordinate XSLT stylesheet (imported by the main stylesheet), or</li>
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<li>the buildfile</li>
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2001-08-30 13:23:14 +00:00
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</ol>
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2001-09-08 01:05:18 +00:00
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2018-02-28 07:58:59 +01:00
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<p>If any of the sources in the above example does not exist, all target files will also be removed.
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To ignore missing sources instead, use filesets instead of filelists for the sources.</p>
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2001-08-06 14:32:46 +00:00
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</body>
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</html>
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