docs/manual/CoreTasks/dependset.html - ant - Git at Google

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 <h2>DependSet</h2>

 A task to manage arbitrary dependencies between files.

 <h3>Description</h3>

 <p>
 The dependset task compares a set of source files with a set of target
 files.  If any of the source files is more recent than any of
 the target files, all of the target files are removed.
 </p>
 <p>
 Source files and target files are specified via nested <a
 href="../CoreTypes/fileset.html">FileSets</a> and/or nested <a
 href="../CoreTypes/filelist.html">FileLists</a>.  Arbitrarily many
 source and target filesets/filelists may be specified, but at
 least one filelist/fileset is required for both sources and targets.
 </p>
 <p>
 Use a FileSet when you want to use wildcard include or exclude
 patterns and don't care about missing files.  Use a FileList when you
 want to consider the non-existence of a file as if it were out of
 date.  If there are any non-existing files in any source or target
 FileList, all target files will be removed.
 </p>
 <p>
 DependSet is useful to capture dependencies that are not or cannot be
 determined algorithmically.  For example, the &lt;style&gt; task only
 compares the source XML file and XSLT stylesheet against the target
 file to determined whether to restyle the source.  Using dependset you
 can extend this dependency checking to include a DTD or XSD file as
 well as other stylesheets imported by the main stylesheet.
 </p>

 <h3>Parameters</h3>

 <p>
 (none)
 </p>

 <h3>Parameters Specified as Nested Elements</h3>

 <h4>srcfileset</h4>

 <p>
 The nested <code>srcfileset</code> element specifies a <a
 href="../CoreTypes/fileset.html">FileSet</a>. All files included in
 this fileset will be compared against all files included in all of the
 <code>targetfileset</code> filesets and <code>targetfilelist</code>
 filelists.  Multiple <code>srcfileset</code> filesets may be specified.
 </p>

 <h4>srcfilelist</h4>

 <p>
 The nested <code>srcfilelist</code> element specifies a <a
 href="../CoreTypes/filelist.html">FileList</a>. All files included in
 this filelist will be compared against all files included in all of the
 <code>targetfileset</code> filesets and <code>targetfilelist</code>
 filelists.  Multiple <code>srcfilelist</code> filelists may be specified.
 </p>

 <h4>targetfileset</h4>

 <p>
 The nested <code>targetfileset</code> element specifies a <a
 href="../CoreTypes/fileset.html">FileSet</a>.  All files included in
 this fileset will be compared against all files included in all of the
 <code>srcfileset</code> filesets and <code>sourcefilelist</code>
 filelists, and if any are older, they are all deleted.
 </p>

 <h4>targetfilelist</h4>

 <p>
 The nested <code>targetfilelist</code> element specifies a <a
 href="../CoreTypes/filelist.html">FileList</a>.  All files included in
 this filelist will be compared against all files included in all of the
 <code>srcfileset</code> filesets and <code>sourcefilelist</code>
 filelists, and if any are older, they are all deleted.
 </p>

 <h3>Examples</h3>
 <blockquote> <pre>
     &lt;dependset&gt;
        &lt;srcfilelist
            dir   = &quot;${dtd.dir}&quot;
            files = &quot;paper.dtd,common.dtd&quot;/&gt;
        &lt;srcfilelist
            dir   = &quot;${xsl.dir}&quot;
            files = &quot;common.xsl&quot;/&gt;
        &lt;srcfilelist
            dir   = &quot;${basedir}&quot;
            files = &quot;build.xml&quot;/&gt;
        &lt;targetfileset
            dir      = &quot;${output.dir}&quot;
            includes = &quot;**/*.html&quot;/&gt;
     &lt;/dependset&gt;  </pre>
 </blockquote>

 <p>
 In this example derived HTML files in the ${output.dir} directory
 will be removed if any are out-of-date with respect to:
 <ol>
 <li>the DTD of their source XML files</li>
 <li>a common DTD (imported by the main DTD)</li>
 <li>a subordinate XSLT stylesheet (imported by the main stylesheet), or</li>
 <li>the buildfile</li>
 </ol>
 </p>
 <p>
 If any of the source files in the above example does not exist, all
 target files will also be removed.  To ignore missing source files instead,
 use filesets instead of filelists for the source files.
 </p>

 <hr>
 <p align="center">Copyright &copy; 2000,2001 Apache Software Foundation.
 All rights
 Reserved.</p>

 </body>
 </html>
	<html>

	<head>
	<meta http-equiv="Content-Language" content="en-us">
	<title>Ant User Manual</title>
	</head>

	<body>

	<h2>DependSet</h2>

	A task to manage arbitrary dependencies between files.

	<h3>Description</h3>

	<p>
	The dependset task compares a set of source files with a set of target
	files. If any of the source files is more recent than any of
	the target files, all of the target files are removed.
	</p>
	<p>
	Source files and target files are specified via nested <a
	href="../CoreTypes/fileset.html">FileSets</a> and/or nested <a
	href="../CoreTypes/filelist.html">FileLists</a>. Arbitrarily many
	source and target filesets/filelists may be specified, but at
	least one filelist/fileset is required for both sources and targets.
	</p>
	<p>
	Use a FileSet when you want to use wildcard include or exclude
	patterns and don't care about missing files. Use a FileList when you
	want to consider the non-existence of a file as if it were out of
	date. If there are any non-existing files in any source or target
	FileList, all target files will be removed.
	</p>
	<p>
	DependSet is useful to capture dependencies that are not or cannot be
	determined algorithmically. For example, the <style> task only
	compares the source XML file and XSLT stylesheet against the target
	file to determined whether to restyle the source. Using dependset you
	can extend this dependency checking to include a DTD or XSD file as
	well as other stylesheets imported by the main stylesheet.
	</p>

	<h3>Parameters</h3>

	<p>
	(none)
	</p>

	<h3>Parameters Specified as Nested Elements</h3>

	<h4>srcfileset</h4>

	<p>
	The nested <code>srcfileset</code> element specifies a <a
	href="../CoreTypes/fileset.html">FileSet</a>. All files included in
	this fileset will be compared against all files included in all of the
	<code>targetfileset</code> filesets and <code>targetfilelist</code>
	filelists. Multiple <code>srcfileset</code> filesets may be specified.
	</p>

	<h4>srcfilelist</h4>

	<p>
	The nested <code>srcfilelist</code> element specifies a <a
	href="../CoreTypes/filelist.html">FileList</a>. All files included in
	this filelist will be compared against all files included in all of the
	<code>targetfileset</code> filesets and <code>targetfilelist</code>
	filelists. Multiple <code>srcfilelist</code> filelists may be specified.
	</p>

	<h4>targetfileset</h4>

	<p>
	The nested <code>targetfileset</code> element specifies a <a
	href="../CoreTypes/fileset.html">FileSet</a>. All files included in
	this fileset will be compared against all files included in all of the
	<code>srcfileset</code> filesets and <code>sourcefilelist</code>
	filelists, and if any are older, they are all deleted.
	</p>

	<h4>targetfilelist</h4>

	<p>
	The nested <code>targetfilelist</code> element specifies a <a
	href="../CoreTypes/filelist.html">FileList</a>. All files included in
	this filelist will be compared against all files included in all of the
	<code>srcfileset</code> filesets and <code>sourcefilelist</code>
	filelists, and if any are older, they are all deleted.
	</p>

	<h3>Examples</h3>
	<blockquote> <pre>
	<dependset>
	<srcfilelist
	dir = "${dtd.dir}"
	files = "paper.dtd,common.dtd"/>
	<srcfilelist
	dir = "${xsl.dir}"
	files = "common.xsl"/>
	<srcfilelist
	dir = "${basedir}"
	files = "build.xml"/>
	<targetfileset
	dir = "${output.dir}"
	includes = "*/.html"/>
	</dependset> </pre>
	</blockquote>

	<p>
	In this example derived HTML files in the ${output.dir} directory
	will be removed if any are out-of-date with respect to:
	<ol>
	<li>the DTD of their source XML files</li>
	<li>a common DTD (imported by the main DTD)</li>
	<li>a subordinate XSLT stylesheet (imported by the main stylesheet), or</li>
	<li>the buildfile</li>
	</ol>
	</p>
	<p>
	If any of the source files in the above example does not exist, all
	target files will also be removed. To ignore missing source files instead,
	use filesets instead of filelists for the source files.
	</p>

	<hr>
	<p align="center">Copyright © 2000,2001 Apache Software Foundation.
	All rights
	Reserved.</p>

	</body>
	</html>