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| 3 | <head>
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| 4 | <meta http-equiv="Content-Language" content="en-us">
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| 5 | <title>DependSet Task</title>
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| 6 | <link rel="stylesheet" type="text/css" href="../stylesheets/antmanual.css">
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| 7 | </head>
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| 8 |
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| 9 | <body>
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| 10 |
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| 11 | <h2>DependSet</h2>
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| 12 |
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| 13 | A task to manage arbitrary dependencies between files.
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| 14 |
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| 15 | <h3>Description</h3>
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| 16 |
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| 17 | <p>
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| 18 | The dependset task compares a set of source files with a set of target
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| 19 | files. If any of the source files is more recent than any of
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| 20 | the target files, all of the target files are removed.
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| 21 | </p>
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| 22 | <p>
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| 23 | Source files and target files are specified via nested <a
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| 24 | href="../CoreTypes/fileset.html">FileSets</a> and/or nested <a
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| 25 | href="../CoreTypes/filelist.html">FileLists</a>. Arbitrarily many
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| 26 | source and target filesets/filelists may be specified, but at
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| 27 | least one filelist/fileset is required for both sources and targets.
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| 28 | </p>
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| 29 | <p>
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| 30 | Use a FileSet when you want to use wildcard include or exclude
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| 31 | patterns and don't care about missing files. Use a FileList when you
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| 32 | want to consider the non-existence of a file as if it were out of
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| 33 | date. If there are any non-existing files in any source or target
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| 34 | FileList, all target files will be removed.
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| 35 | </p>
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| 36 | <p>
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| 37 | DependSet is useful to capture dependencies that are not or cannot be
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| 38 | determined algorithmically. For example, the <code><style></code> task only
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| 39 | compares the source XML file and XSLT stylesheet against the target
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| 40 | file to determined whether to restyle the source. Using dependset you
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| 41 | can extend this dependency checking to include a DTD or XSD file as
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| 42 | well as other stylesheets imported by the main stylesheet.
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| 43 | </p>
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| 44 |
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| 45 | <h3>Parameters</h3>
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| 46 |
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| 47 | <p>
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| 48 | (none)
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| 49 | </p>
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| 50 |
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| 51 | <h3>Parameters Specified as Nested Elements</h3>
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| 52 |
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| 53 | <h4>srcfileset</h4>
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| 54 |
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| 55 | <p>
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| 56 | The nested <code>srcfileset</code> element specifies a <a
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| 57 | href="../CoreTypes/fileset.html">FileSet</a>. All files included in
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| 58 | this fileset will be compared against all files included in all of the
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| 59 | <code>targetfileset</code> filesets and <code>targetfilelist</code>
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| 60 | filelists. Multiple <code>srcfileset</code> filesets may be specified.
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| 61 | </p>
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| 62 |
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| 63 | <h4>srcfilelist</h4>
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| 64 |
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| 65 | <p>
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| 66 | The nested <code>srcfilelist</code> element specifies a <a
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| 67 | href="../CoreTypes/filelist.html">FileList</a>. All files included in
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| 68 | this filelist will be compared against all files included in all of the
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| 69 | <code>targetfileset</code> filesets and <code>targetfilelist</code>
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| 70 | filelists. Multiple <code>srcfilelist</code> filelists may be specified.
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| 71 | </p>
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| 72 |
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| 73 | <h4>targetfileset</h4>
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| 74 |
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| 75 | <p>
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| 76 | The nested <code>targetfileset</code> element specifies a <a
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| 77 | href="../CoreTypes/fileset.html">FileSet</a>. All files included in
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| 78 | this fileset will be compared against all files included in all of the
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| 79 | <code>srcfileset</code> filesets and <code>sourcefilelist</code>
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| 80 | filelists, and if any are older, they are all deleted.
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| 81 | Multiple <code>targetfileset</code> filesets may be specified.
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| 82 | </p>
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| 83 |
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| 84 | <h4>targetfilelist</h4>
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| 85 |
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| 86 | <p>
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| 87 | The nested <code>targetfilelist</code> element specifies a <a
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| 88 | href="../CoreTypes/filelist.html">FileList</a>. All files included in
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| 89 | this filelist will be compared against all files included in all of the
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| 90 | <code>srcfileset</code> filesets and <code>sourcefilelist</code>
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| 91 | filelists, and if any are older, they are all deleted.
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| 92 | Multiple <code>targetfilelist</code> filelists may be specified.
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| 93 | </p>
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| 94 |
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| 95 | <h3>Examples</h3>
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| 96 | <blockquote> <pre>
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| 97 | <dependset>
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| 98 | <srcfilelist
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| 99 | dir = "${dtd.dir}"
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| 100 | files = "paper.dtd,common.dtd"/>
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| 101 | <srcfilelist
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| 102 | dir = "${xsl.dir}"
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| 103 | files = "common.xsl"/>
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| 104 | <srcfilelist
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| 105 | dir = "${basedir}"
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| 106 | files = "build.xml"/>
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| 107 | <targetfileset
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| 108 | dir = "${output.dir}"
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| 109 | includes = "**/*.html"/>
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| 110 | </dependset> </pre>
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| 111 | </blockquote>
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| 112 |
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| 113 | <p>
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| 114 | In this example derived HTML files in the ${output.dir} directory
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| 115 | will be removed if any are out-of-date with respect to:</p>
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| 116 | <ol>
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| 117 | <li>the DTD of their source XML files</li>
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| 118 | <li>a common DTD (imported by the main DTD)</li>
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| 119 | <li>a subordinate XSLT stylesheet (imported by the main stylesheet), or</li>
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| 120 | <li>the buildfile</li>
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| 121 | </ol>
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| 122 |
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| 123 | <p>
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| 124 | If any of the source files in the above example does not exist, all
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| 125 | target files will also be removed. To ignore missing source files instead,
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| 126 | use filesets instead of filelists for the source files.
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| 127 | </p>
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| 128 |
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| 129 | <hr>
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| 130 | <p align="center">Copyright © 2001,2004 The Apache Software Foundation.
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| 131 | All rights
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| 132 | Reserved.</p>
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| 133 |
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| 134 | </body>
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| 135 | </html>
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