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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(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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-->
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2002-04-12 03:22:28 +00:00
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<html>
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2002-04-02 14:03:05 +00:00
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2018-02-28 07:58:59 +01:00
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
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<title>Concat</title>
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</head>
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<body>
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<h2 id="concat">Concat</h2>
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<h3>Description</h3>
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<p>Concatenates one or more <a href="../Types/resources.html">resource</a>s to a single file or
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to the console. The destination file will be created if it does not exist unless the resource
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list is empty and <var>ignoreempty</var> is <q>true</q>.</p>
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<p><em>Since Apache Ant 1.7.1</em>, this task can be used as
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a <a href="../Types/resources.html#collection">Resource Collection</a> that will return
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exactly one <a href="../Types/resources.html">resource</a>.</p>
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<p><a href="../Types/resources.html#collection">Resource Collection</a>s are used to select
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which resources are to be concatenated. There is no singular attribute to specify a single
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resource to <code>cat</code>.</p>
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<h3>Parameters</h3>
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<table class="attr">
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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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</tr>
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<tr>
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<td>destfile</td>
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<td>The destination file for the concatenated stream. If not specified the console will be
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used instead.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>append</td>
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<td>Specifies whether or not the file specified by <var>destfile</var> should be
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appended.</td>
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<td>No; defaults to <q>no</q></td>
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</tr>
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<tr>
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<td>force</td>
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<td>Specifies whether or not the file specified by <var>destfile</var> should be written to
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even if it is newer than all source files. <em><u>Deprecated</u>, use
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the <var>overwrite</var> attribute instead.</em></td>
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<td>No; defaults to <q>yes</q></td>
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</tr>
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<tr>
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<td>overwrite</td>
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<td>Specifies whether or not the file specified by <var>destfile</var> should be written to
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even if it is newer than all source files. <em>Since Ant 1.8.2</em>.</td>
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<td>No; defaults to <q>yes</q></td>
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</tr>
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<tr>
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<td>forceReadOnly</td>
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<td>Overwrite read-only destination files. <em>Since Ant 1.8.2</em></td>
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<td>No; defaults to <q>false</q></td>
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</tr>
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<tr>
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<td>encoding</td>
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<td>Specifies the encoding for the input files. Please
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see <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html">Supported
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Encodings</a> for a list of possible values.</td>
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<td>No; defaults to default JVM character encoding</td>
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</tr>
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<tr>
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<td>outputencoding</td>
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<td>The encoding to use when writing the output file. <em>Since Ant 1.6</em>.</td>
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<td>No; defaults to <var>encoding</var> if set or default JVM character encoding
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otherwise</td>
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</tr>
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<tr>
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<td>fixlastline</td>
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<td>Specifies whether or not to check if each file concatenated is terminated by a new
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line. If this attribute is <q>yes</q> a new line will be appended to the stream if the
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file did not end in a new line. <em>Since Ant 1.6</em>. This attribute does not apply to
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embedded text.</td>
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<td>No; defaults to <q>no</q></td>
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</tr>
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<tr>
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<td>eol</td>
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<td>Specifies what the end of line character are for use by the fixlastline
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attribute. <em>Since Ant 1.6</em> Valid values for this property are:
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<ul>
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<li><q>cr</q>: a single CR</li>
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<li><q>lf</q>: a single LF</li>
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<li><q>crlf</q>: the pair CRLF</li>
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<li><q>mac</q>: a single CR</li>
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<li><q>unix</q>: a single LF</li>
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<li><q>dos</q>: the pair CRLF</li>
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</ul></td>
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<td>No; default is platform dependent: <q>lf</q> for Unix, <q>crlf</q> for DOS family
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(including Windows), <q>cr</q> for Mac OS 9 or earlier</td></tr>
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<tr>
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<td>binary</td>
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<td><em>Since Ant 1.6.2</em> If this attribute is set to <q>true</q>, the task concatenates
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the files in a byte by byte fashion. If this attribute is <q>false</q>, concat will not
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normally work for binary files due to character encoding issues. If this option is set
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to <q>true</q>, the <var>destfile</var> attribute must be set, and the task cannot used
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nested text. Also the
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attributes <var>encoding</var>, <var>outputencoding</var>, <var>filelastline</var> cannot
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be used.</td>
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<td>No; default is <q>false</q></td>
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</tr>
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<tr>
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<td>ignoreempty</td>
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<td><em>Since Ant 1.8.0</em> Specifies whether or not the file specified
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by <var>destfile</var> should be created if the source resource list is empty.
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</td>
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<td>No; defaults to <q>true</q></td>
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</tr>
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<tr>
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<td>resourcename</td>
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<td><em>Since Ant 1.8.3</em> Specifies the name reported if this task is exposed as
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a <a href="../Types/resources.html">resource</a>.
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</td>
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<td>No</td>
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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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<h4>Resource Collection</h4>
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<p><em>since Ant 1.7</em>.</p>
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<p>Any of the various <a href="../Types/resources.html#collection">Resource Collection</a> types
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can specify the resources to be concatenated.</p>
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<h4>filterchain</h4>
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<p><em>since Ant 1.6</em>.</p>
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<p>The concat task supports nested <a href="../Types/filterchain.html">FilterChain</a>s.</p>
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<h4>header, footer</h4>
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<p><em>since Ant 1.6</em>.</p>
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<p>Used to prepend or postpend text into the concatenated stream.</p>
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<p>The text may be in-line or be in a file.</p>
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<table class="attr">
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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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</tr>
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<tr>
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<td>filtering</td>
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<td>Whether to filter the text provided by this sub element.</td>
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<td>No; default is <q>yes</q></td>
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</tr>
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<tr>
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<td>file</td>
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<td>A file to place at the head or tail of the concatenated text.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>trim</td>
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<td>Whether to trim the value.</td>
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<td>No; default is <q>no</q></td>
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</tr>
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<tr>
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<td>trimleading</td>
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<td>Whether to trim leading white space on each line.</td>
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<td>No; default is <q>no</q></td>
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</tr>
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</table>
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<h3>Examples</h3>
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<p><strong>Concatenate a string to a file:</strong></p>
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<pre><concat destfile="README">Hello, World!</concat></pre>
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<p><strong>Concatenate a series of files to the console:</strong></p>
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<pre>
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<concat>
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<fileset dir="messages" includes="*important*"/>
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</concat></pre>
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<p><strong>Concatenate a single file, appending if the destination file exists:</strong></p>
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<pre>
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<concat destfile="NOTES" append="true">
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<filelist dir="notes" files="note.txt"/>
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</concat></pre>
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<p><strong>Concatenate a series of files, update the destination file only if is older that all
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the source files:</strong></p>
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<pre>
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<concat destfile="${docbook.dir}/all-sections.xml"
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force="no">
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<filelist dir="${docbook.dir}/sections"
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files="introduction.xml,overview.xml"/>
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<fileset dir="${docbook.dir}"
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includes="sections/*.xml"
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excludes="introduction.xml,overview.xml"/>
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</concat></pre>
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<p><strong>Concatenate a series of files, expanding Ant properties</strong></p>
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<pre>
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<concat destfile="${build.dir}/subs">
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<path>
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<fileset dir="${src.dir}" includes="*.xml"/>
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<pathelement location="build.xml"/>
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</path>
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<filterchain>
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<expandproperties/>
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</filterchain>
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</concat></pre>
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<p><strong>Filter the lines containing project from build.xml and output them to report.output,
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prepending with a header</strong></p>
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<pre>
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<concat destfile="${build.dir}/report.output">
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<header filtering="no" trimleading="yes">
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Lines that contain project
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==========================
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</header>
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<path path="build.xml"/>
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<filterchain>
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<linecontains>
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<contains value="project"/>
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</linecontains>
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</filterchain>
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</concat></pre>
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<p><strong>Concatenate a number of binary files.</strong></p>
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<pre>
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<concat destfile="${build.dir}/dist.bin" binary="yes">
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<fileset file="${src.dir}/scripts/dist.sh"/>
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<fileset file="${build.dir}/dist.tar.bz2"/>
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</concat></pre>
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</body>
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2018-01-22 23:52:21 +01:00
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</html>
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