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Also, echoxml closes its file handles. git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@356356 13f79535-47bb-0310-9956-ffa450edef68
166 lines
5.0 KiB
HTML
166 lines
5.0 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>Echo Task</title>
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</head>
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<body>
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<h2><a name="echo">Echo</a></h2>
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<h3>Description</h3>
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<p>Echoes a message to the current loggers and listeners which
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means <tt>System.out</tt> unless overridden. A <tt>level</tt>
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can be specified, which controls at what logging level the message is
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filtered at.
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<p>
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The task can also echo to a file, in which case the option to append rather
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than overwrite the file is available, and the <tt>level</tt> option is
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ignored</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">message</td>
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<td valign="top">the message to echo.</td>
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<td valign="top" align="center">Yes, unless data is included in a
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character section within this element.</td>
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</tr>
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<tr>
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<td valign="top">file</td>
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<td valign="top">the file to write the message to.</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">append</td>
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<td valign="top">Append to an existing file (or
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<a href="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html#FileWriter(java.lang.String, boolean)" target="_blank">
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open a new file / overwrite an existing file</a>)?
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</td>
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<td valign="top" align="center">No - default is false.</td>
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</tr>
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<tr>
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<td valign="top">level</td>
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<td valign="top">Control the level at which this message is reported.
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One of "error", "warning", "info", "verbose", "debug" (decreasing order)</td>
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<td valign="top" align="center">No - default is "warning".</td>
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</tr>
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<tr>
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<td valign="top">encoding</td>
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<td valign="top">encoding to use, default is ""; the local system encoding.</td>
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<td valign="top" align="center">No</td>
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</tr>
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</table>
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<h3>Examples</h3>
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<pre>
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<echo message="Hello, world"/>
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</pre>
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<pre>
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<echo message="Embed a line break:${line.separator}"/>
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</pre>
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<pre>
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<echo>Embed another:${line.separator}</echo>
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</pre>
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<pre>
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<echo>This is a longer message stretching over
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two lines.
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</echo>
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</pre>
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<pre>
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<echo>
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This is a longer message stretching over
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three lines; the first line is a blank
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</echo>
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</pre>
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The newline immediately following the <echo> tag will be part of the output.<br>
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Newlines in character data within the content of an element are not discarded by XML parsers.<br>
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See <a href="http://www.w3.org/TR/2004/REC-xml-20040204/#sec-line-ends">
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W3C Recommendation 04 February 2004 / End of Line handling
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</a> for more details.
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<pre><echo message="Deleting drive C:" level="debug"/></pre>
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A message which only appears in <tt>-debug</tt> mode.
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<pre><echo level="error">
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Imminent failure in the antimatter containment facility.
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Please withdraw to safe location at least 50km away.
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</echo>
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</pre>
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A message which appears even in <tt>-quiet</tt> mode.
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<pre><echo file="runner.csh" append="false">#\!/bin/tcsh
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java-1.3.1 -mx1024m ${project.entrypoint} $$*
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</echo></pre>
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Generate a shell script by echoing to a file.
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Note the use of a double $ symbol to stop Ant
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filtering out the single $ during variable expansion
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<p>Depending on the loglevel Ant runs, messages are print out or silently
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ignored:
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<table>
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<tr>
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<th>Ant-Statement</th>
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<th>-quiet, -q</th>
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<th><i>no statement</th>
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<th>-verbose, -v</th>
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<th>-debug, -d</th>
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</tr>
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<tr>
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<td><pre><echo message="This is error message." level="error" /></pre></td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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</tr>
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<tr>
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<td><pre><echo message="This is warning message." /></pre></td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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</tr>
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<tr>
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<td><pre><echo message="This is warning message." level="warning" /></pre></td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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</tr>
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<tr>
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<td><pre><echo message="This is info message." level="info" /></pre></td>
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<td align="center">not logged</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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</tr>
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<tr>
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<td><pre><echo message="This is verbose message." level="verbose" /></pre></td>
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<td align="center">not logged</td>
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<td align="center">not logged</td>
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<td align="center">ok</td>
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<td align="center">ok</td>
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</tr>
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<tr>
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<td><pre><echo message="This is debug message." level="debug" /></pre></td>
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<td align="center">not logged</td>
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<td align="center">not logged</td>
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<td align="center">not logged</td>
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<td align="center">ok</td>
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</tr>
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</table>
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<hr>
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<p align="center">Copyright © 2000-2002,2004-2005 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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