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104 lines
3.1 KiB
HTML
104 lines
3.1 KiB
HTML
<html>
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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>GUnzip/BUnzip2 Task</title>
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</head>
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<body>
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<h2><a name="unpack">GUnzip/BUnzip2</a></h2>
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<h3>Description</h3>
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<p>Expands a resource packed using GZip or BZip2.</p>
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<p>If <i>dest</i> is a directory the name of the destination file is
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the same as <i>src</i> (with the ".gz" or ".bz2"
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extension removed if present). If <i>dest</i> is omitted, the parent
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dir of <i>src</i> is taken. The file is only expanded if the source
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resource is newer than the destination file, or when the destination file
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does not exist.</p>
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<h3>Parameters</h3>
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<table border="1" cellpadding="2" cellspacing="0">
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<tr>
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<td valign="top"><b>Attribute</b></td>
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<td valign="top"><b>Description</b></td>
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<td align="center" valign="top"><b>Required</b></td>
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</tr>
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<tr>
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<td valign="top">src</td>
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<td valign="top">the file to expand.</td>
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<td align="center" valign="top">Yes, or a nested resource collection.</td>
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</tr>
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<tr>
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<td valign="top">dest</td>
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<td valign="top">the destination file or directory.</td>
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<td align="center" valign="top">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>any <a href="../CoreTypes/resources.html">resource</a> or single element
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resource collection</h4>
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<p>The specified resource will be used as src.</p>
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<h3>Examples</h3>
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<blockquote><pre>
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<gunzip src="test.tar.gz"/>
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</pre></blockquote>
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<p>expands <i>test.tar.gz</i> to <i>test.tar</i></p>
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<blockquote><pre>
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<bunzip2 src="test.tar.bz2"/>
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</pre></blockquote>
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<p>expands <i>test.tar.bz2</i> to <i>test.tar</i></p>
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<blockquote><pre>
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<gunzip src="test.tar.gz" dest="test2.tar"/>
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</pre></blockquote>
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<p>expands <i>test.tar.gz</i> to <i>test2.tar</i></p>
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<blockquote><pre>
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<gunzip src="test.tar.gz" dest="subdir"/>
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</pre></blockquote>
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<p>expands <i>test.tar.gz</i> to <i>subdir/test.tar</i> (assuming
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subdir is a directory).</p>
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<blockquote><pre>
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<gunzip dest=".">
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<url url="http://example.org/archive.tar.gz"/>
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</gunzip>
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</pre></blockquote>
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<p>downloads <i>http://example.org/archive.tar.gz</i> and expands it
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to <i>archive.tar</i> in the project's basedir on the fly.</p>
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<h3>Related tasks</h3>
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<pre>
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<gunzip src="some-archive.gz" dest="some-dest-dir"/>
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</pre>
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is identical to
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<pre>
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<copy todir="some-dest-dir">
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<gzipresource>
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<file file="some-archive.gz"/>
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</gzipresource>
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<mapper type="glob" from="*.gz" to="*"/>
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</copy>
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</pre>
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<p>The same is also true for <code><bunzip2></code> and
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<code><bzip2resource></code>. <code><copy></code> offers
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additional features like <a
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href="../CoreTypes/filterchains.html">filtering files</a> on the fly,
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allowing a file to be mapped to multiple destinations, preserving the
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last modified time or a configurable file system timestamp
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granularity.</p>
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<hr>
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<p align="center">Copyright © 2000-2001,2004-2005 The Apache Software Foundation. All rights
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Reserved.</p>
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</body>
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</html>
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