2006-09-11 04:19:00 +00:00
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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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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A task to manage arbitrary dependencies between resources.
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<h3>Description</h3>
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<p>
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The dependset task compares a set of sources with a set of target
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files. If any of the sources has been modified more recently than
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any of the target files, all of the target files are removed.
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</p>
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<p>
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Sources and target files are specified via nested
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<a href="../CoreTypes/resources.html#collection">Resource Collection</a>s;
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sources can be resources of any type, while targets are restricted to files
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only. At least one set of sources and one set of targets is required.
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</p>
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<p>
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Use a FileSet when you want to use wildcard include or exclude
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patterns and don't care about missing files. Use a FileList when you
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want to consider the non-existence of a file as if it were out of
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date. If there are any non-existing files in any source or target
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FileList, all target files will be removed.
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</p>
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<p>
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DependSet is useful to capture dependencies that are not or cannot be
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determined algorithmically. For example, the <code><style></code> task only
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compares the source XML file and XSLT stylesheet against the target
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file to determined whether to restyle the source. Using dependset you
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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.
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</p>
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<h3>Parameters</h3>
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<p>
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(none)
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</p>
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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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<p>The <code><sources></code> element is a
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<a href="../CoreTypes/resources.html#union">Union</a> into which
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arbitrary resource collections can be nested. <b>Since Ant 1.7</b>
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</p>
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<h4>srcfileset</h4>
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<p>
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The nested <code><srcfileset></code> element specifies a <a
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href="../CoreTypes/fileset.html">FileSet</a>. All files included in
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this fileset will be compared against all files included in all of the
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<code><targetfileset></code> filesets and <code><targetfilelist></code>
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filelists. Multiple <code><srcfileset></code> filesets may be specified.
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</p>
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<h4>srcfilelist</h4>
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<p>
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The nested <code><srcfilelist></code> element specifies a <a
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href="../CoreTypes/filelist.html">FileList</a>. All files included in
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this filelist will be compared against all files included in all of the
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<code><targetfileset></code> filesets and <code><targetfilelist></code>
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filelists. Multiple <code><srcfilelist></code> filelists may be specified.
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</p>
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<h4>targets</h4>
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<p>The <code><targets></code> element is a
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<a href="../using.html#path">Path</a> and thus can
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include any filesystem-based resource. <b>Since Ant 1.7</b>
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</p>
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<h4>targetfileset</h4>
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<p>
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The nested <code><targetfileset></code> element specifies a <a
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href="../CoreTypes/fileset.html">FileSet</a>. All files included in
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this fileset will be compared against all files included in all of the
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<code><srcfileset></code> filesets and <code><sourcefilelist></code>
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filelists, and if any are older, they are all deleted.
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Multiple <code><targetfileset></code> filesets may be specified.
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</p>
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<h4>targetfilelist</h4>
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<p>
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The nested <code><targetfilelist></code> element specifies a <a
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href="../CoreTypes/filelist.html">FileList</a>. All files included in
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this filelist will be compared against all files included in all of the
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<code><srcfileset></code> filesets and <code><sourcefilelist></code>
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filelists, and if any are older, they are all deleted.
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Multiple <code><targetfilelist></code> filelists may be specified.
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</p>
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<h3>Examples</h3>
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<blockquote> <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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</blockquote>
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<p>
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In this example derived HTML files in the ${output.dir} directory
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will be removed if any are out-of-date with respect to:</p>
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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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</ol>
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2001-09-08 01:05:18 +00:00
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2001-08-06 14:32:46 +00:00
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<p>
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If any of the sources in the above example does not exist, all
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target files will also be removed. To ignore missing sources instead,
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use filesets instead of filelists for the sources.
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</p>
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<hr>
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<p align="center">Copyright © 2001, 2004-2005 The Apache Software Foundation.
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All rights
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Reserved.</p>
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</body>
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</html>
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