wangwei
/
antliscence
forked from youys/ant

<html>

<head>
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Ant</title>
</head>

<body>

<h1>Ant User Manual</h1>
<p>by&nbsp;</p>
<ul>
  <li> Arnout J. Kuiper <a href="mailto:(ajkuiper@wxs.nl">(ajkuiper@wxs.nl</a>)</li>
  <li>Stefano Mazzocchi <a href="mailto:(stefano@apache.org">(stefano@apache.org</a>)</li>
</ul>
<p>Version 1.0.2 - 2000/01/26</p>
<hr>
<h2>Table of Contents</h2>
<ul>
  <li><a href="#introduction">Introduction</a></li>
  <li><a href="#getting">Getting Ant</a></li>
  <li><a href="#buildingant">Building Ant</a></li>
  <li><a href="#installing">Installing Ant</a></li>
  <li><a href="#running">Running Ant</a></li>
  <li><a href="#buildfile">Writing a simple buildfile</a>
  <li><a href="#tasks">Built in Tasks</a>
  <li><a href="#writingowntask">Writing your own task</a></li>
  <li><a href="#license">License</a></li>
  <li><a href="#feedback">Feedback</a></li>
</ul>
<hr>
<h2><a name="introduction">Introduction</a></h2>
<p>Ant is a Java based build tool. In theory it is kind of like make without
makes wrinkles.</p>
<h3>Why?</h3>
<p>Why another build tool when there is already make, gnumake, nmake, jam, and
others? Because all of those tools have limitations that its original author
couldn't live with when developing software across multiple platforms. Make like
tools are inherently shell based. They evaluate a set of dependencies and then
execute commands not unlike what you would issue on a shell. This means that you
can easily extend these tools by using or writing any program for the OS that
you are working on. However, this also means that you limit yourself to the OS,
or at least the OS type such as Unix, that you are working on.</p>
<p>Makefiles are inherently evil as well. Anybody who has worked on them for any
time has run into the dreaded tab problem. &quot;Is my command not executing
because I have a space in front of my tab!!!&quot; said the original author of
Ant way too many times. Tools like Jam took care of this to a great degree, but
still use yet another format to use and remember.</p>
<p>Ant is different. Instead a model where it is extended with shell based
commands, it is extended using Java classes. Instead of writing shell commands,
the configuration files are XML based calling out a target tree where various
tasks get executed. Each task is run by an object which implements a particular
Task interface.</p>
<p>Granted, this removes some of the expressive power that is inherent by being
able to construct a shell command such as `find . -name foo -exec rm {}` but it
gives you the ability to be cross platform. To work anywhere and everywhere. And
hey, if you really need to execute a shell command, Ant has an exec rule that
allows different commands to be executed based on the OS that it is executing
on.</p>
<hr>
<h2><a name="getting">Getting Ant</a></h2>
<h3>Binary edition</h3>
<p>The latest stable version of Ant can be downloaded from <a
href="http://jakarta.apache.org/builds/tomcat/release/v3.0/ant.zip">http://jakarta.apache.org/builds/tomcat/release/v3.0/ant.zip</a>.
If you like living on the edge, you can download the latest version from <a
href="http://jakarta.apache.org/builds/tomcat/nightly/ant.zip">http://jakarta.apache.org/builds/tomcat/nightly/ant.zip</a>.</p>
<h3>Source edition</h3>
<p>If you prefer the source edition, you can download Ant from <a
href="http://jakarta.apache.org/builds/tomcat/release/v3.0/src/jakarta-tools.src.zip">http://jakarta.apache.org/builds/tomcat/release/v3.0/src/jakarta-tools.src.zip</a>
(latest stable) or from <a
href="http://jakarta.apache.org/from-cvs/jakarta-tools/">http://jakarta.apache.org/from-cvs/jakarta-ant/</a>
(current). See the section <a href="#buildingant">Building Ant</a> on how to
build Ant from the source code.</p>
<hr>
<h2><a name="buildingant">Building Ant</a></h2>
<p>Go to the directory <code>jakarta-ant</code>.</p>
<p>Make sure the JDK is in you path.</p>
<p>Run <code>bootstrap.bat</code> (Windows) or <code>bootstrap.sh</code> (UNIX)
to build a bootstrap version of Ant.</p>
<p>When finished, use</p>
<blockquote>
<p><code>build.bat -Ddist.dir=&lt;directory to install Ant&gt; dist</code></p>
</blockquote>
<p>for Windows, and</p>
<blockquote>
<p><code>build.sh -Ddist.dir=&lt;directory to install Ant&gt; dist</code></p>
</blockquote>
<p>for UNIX, to create a binary distribution of Ant. This distribution can be
found in the directory you specified.</p>
<hr>
<h2><a name="installing">Installing Ant</a></h2>
<p>The binary distribution of Ant consists of three directories: <code>bin</code>,
<code>docs</code> and <code>lib</code>. Only the <code>bin</code> and <code>lib</code>
directory are crucial for running Ant. To run Ant, the following must be done:</p>
<ul>
  <li>Add the <code>bin</code> directory to your path.</li>
  <li>Set the ANT_HOME environment variable. This should be set to the directory
    which contains the <code>bin</code> and <code>lib</code> directory.</li>
  <li>Set the JAVA_HOME environment variable. This should be set to the
    directory where the JDK is installed.</li>
</ul>
<h3>Windows</h3>
<p>Assume Ant is installed in <code>c:\ant\</code>. The following sets up the
environment:</p>
<pre>set ANT_HOME=c:\ant
set JAVA_HOME=c:\jdk1.2.2
set PATH=%PATH%;%ANT_HOME%\bin</pre>
<h3>Unix (bash)</h3>
<p>Assume Ant is installed in <code>/usr/local/ant</code>. The following sets up
the environment:</p>
<pre>export ANT_HOME=/usr/local/ant
export JAVA_HOME=/usr/local/jdk-1.2.2
export PATH=${PATH}:${ANT_HOME}/bin</pre>
<h3>Advanced</h3>
<p>There are lots of variants that can be used to run Ant. What you need is at
least the following:</p>
<p>The classpath for Ant must contain <code>ant.jar</code> and <code>xml.jar</code>.</p>
<p>When you need JDK functionality (like a <a href="#javac">javac</a> task, or a
<a href="#rmic">rmic</a> task), then for JDK 1.1, the <code>classes.zip</code>
file of the JDK must be added to the classpath; for JDK 1.2, <code>tools.jar</code>
must be added.</p>
<p>When you are executing platform specific applications (like the <a
href="#exec">exec</a> task, or the <a href="#cvs">cvs</a> task), the property <code>ant.home</code>
must be set to the directory containing a bin directory, which contains <code>antRun.bat</code>
(Windows) or <code>antRun</code> (Unix).</p>
<hr>
<h2><a name="running">Running Ant</a></h2>
<p>Running Ant is simple, when you installed it as described in the previous
section. Just type <code>ant</code>.</p>
<p>When nothing is specified, Ant looks for a <code>build.xml</code> file in the
current directory. When found, it uses that file as a buildfile. To make Ant use
another buildfile, use the commandline option <i>-buildfile &lt;file&gt;</i>,
where <i>&lt;file&gt;</i> is the buildfile you want to use.</p>
<p>You can also set properties which override properties specified in the
buildfile. This can be done with the <i>-D&lt;property&gt;=&lt;value&gt;</i>
option, where <i>&lt;property&gt;</i> is the name of the property and <i>&lt;value&gt;</i>
the value.</p>
<p>To more options are <i>-quiet</i> which instructs Ant to print less
information on the console when running. The option <i>-verbose</i> on the other
hand makes Ant print more information on the console.</p>
<p>It is also possible to specify the target that should be executed. Default
the target that is mentioned in the <i>default</i> attribute of the project is
used. This can be overridden by adding the target name to the end of the
commandline.</p>
<p>Commandline option summary:</p>
<pre>ant [options] [target]
Options:
-help                  print this message
-quiet                 be extra quiet
-verbose               be extra verbose
-logfile &lt;file&gt;        use given file for log
-buildfile &lt;file&gt;      use given buildfile
-D&lt;property&gt;=&lt;value&gt;   use value for given property</pre>
<h3>Examples</h3>
<blockquote>
<pre>ant</pre>
</blockquote>
<p>runs Ant using the <code>build.xml</code> file in the current directory, on
the default target.</p>
<blockquote>
<pre>ant -buildfile test.xml</pre>
</blockquote>
<p>runs Ant using the <code>test.xml</code> file in the current directory, on
the default target.</p>
<blockquote>
<pre>ant -buildfile test.xml dist</pre>
</blockquote>
<p>runs Ant using the <code>test.xml</code> file in the current directory, on a
target called <code>dist</code>.</p>
<blockquote>
<pre>ant -buildfile test.xml -Dbuild=build/classes dist</pre>
</blockquote>
<p>runs Ant using the <code>test.xml</code> file in the current directory, on a
target called <code>dist</code>. It also sets the <i>build</i> property to the
value <i>build/classes</i>.</p>
<h3>Running Ant by hand</h3>
<p>When you have installed Ant in the do-it-yourself way, Ant can be started
with:</p>
<blockquote>
<pre>set CLASSPATH=c:\ant\lib\ant.jar;c:\ant\lib\xml.jar;c:\jdk1.2.2\lib\tools.jar
java -Dant.home=c:\ant org.apache.tools.ant.Main [options] [target]</pre>
</blockquote>
<p>These instructions actually do exactly the same as the <code>ant</code>
command. The options and target are the same as when running Ant with the <code>ant</code>
command.</p>
<hr>
<h2><a name="buildfile">Writing a simple buildfile</a></h2>
<p>The buildfile is an written in XML. Each buildfile contains one project.</p>
<h3>Projects</h3>
<p>A project has three attributes:</p>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">name</td>
    <td valign="top">the name of the project.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">default</td>
    <td valign="top">the default target to use when no target is supplied.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">basedir</td>
    <td valign="top">the base directory from which all path calculations are
      done. This attribute might be overridden by setting the &quot;basedir&quot;
      property on forehand. When this is done, it might be ommitted in the
      project tag.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<p>Each project defines one or more targets. A target is a set of tasks you want
to be executed. When starting Ant, you can select which target you want to have
executed. When no target is given, the project's default is used.</p>
<h3>Targets</h3>
<p>A target can depend on other targets. You might have a target for compiling,
for instance, and a target for creating a distributable. You can only build a
distributable when you have compiled first, so the distribute target depends on
the compile target. Ant resolves all these dependencies.</p>
<p>Ant tries to execute the targets in the <i>depends</i> attribute in the order
they appear (from left to right). Keep in mind that it is possible that a target
can get executed earlier when an earlier target depends on it:</p>
<pre>&lt;target name=&quot;A&quot;/&gt;
&lt;target name=&quot;B&quot; depends=&quot;A&quot;/&gt;
&lt;target name=&quot;C&quot; depends=&quot;B&quot;/&gt;
&lt;target name=&quot;D&quot; depends=&quot;C,B,A&quot;/&gt;</pre>
<p>Suppose we want to execute target D. From its <i>depends</i> attribute, you
might think that first target C, then B and then A is executed. Wrong! C depends
on B, and B depends on A, so first A is executed, then B, then C, and finally D.</p>
<p>In situations without such dependencies, you can rely on the order of the
targets in the <i>depends</i> attributes.</p>
<p>A target gets executed only once. Even when more targets depend on it (see
the previous example).</p>
<p>A target has the following attributes:</p>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">name</td>
    <td valign="top">the name of the project.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">depends</td>
    <td valign="top">a comma separated list of names of targets on which this
      target depends.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Tasks</h3>
<p>A task is a piece of code that can be executed.</p>
<p>A task can have multiple attributes (or arguments if you prefer). The value
of an attribute might contain references to a property. These references will be
resolved before the task is executed.</p>
<p>Tasks have a common structure:</p>
<blockquote>
<pre>&lt;name attribute1=&quot;value1&quot; attribute2=&quot;value2&quot; ... /&gt;</pre>
</blockquote>
<p>where name is the name of the task, attribute-x the attribute name, and
value-x the value of this attribute.</p>
<p>There is a set of <a href="#tasks">built in tasks</a>, but it is also very
easy to <a href="#writingowntask">write your own</a>.</p>
<h3>Properties</h3>
<p>A project can have a set of properties. These might be set in the buildfile
by the <a href="#property">property task</a>, or might be set outside Ant. A
property has a name and a value. Properties might be used in in the value of
task attributes. This is done by placing the property name between
&quot;${&quot; and &quot;}&quot; in the attribute value.</p>
<p>If there is a property called &quot;builddir&quot; with the value
&quot;build&quot;, then this could be used in an attribute like this: &quot;${builddir}/classes&quot;.
This is resolved as &quot;build/classes&quot;.</p>
<h3>Examples</h3>
<blockquote>
<pre>&lt;project name=&quot;foo&quot; default=&quot;dist&quot; basedir=&quot;.&quot;&gt;
  &lt;target name=&quot;init&quot;&gt;
    &lt;tstamp/&gt;
    &lt;property name=&quot;build&quot; value=&quot;build&quot; /&gt;
    &lt;property name=&quot;dist&quot;  value=&quot;dist&quot; /&gt;
  &lt;/target&gt;

  &lt;target name=&quot;prepare&quot; depends=&quot;init&quot;&gt;
    &lt;mkdir dir=&quot;${build}&quot; /&gt;
  &lt;/target&gt;

  &lt;target name=&quot;compile&quot; depends=&quot;prepare&quot;&gt;
    &lt;javac srcdir=&quot;${src}&quot; destdir=&quot;${build}&quot; /&gt;
  &lt;/target&gt;

  &lt;target name=&quot;dist&quot; depends=&quot;compile&quot;&gt;
    &lt;mkdir dir=&quot;${dist}/lib&quot; /&gt;
    &lt;jar jarfile=&quot;${dist}/lib/foo${DSTAMP}.jar&quot;
     basedir=&quot;${build}&quot; items=&quot;com&quot;/&gt;
  &lt;/target&gt;

  &lt;target name=&quot;clean&quot; depends=&quot;init&quot;&gt;
    &lt;deltree dir=&quot;${build}&quot; /&gt;
    &lt;deltree dir=&quot;${dist}&quot; /&gt;
  &lt;/target&gt;
&lt;/project&gt;
</pre>
</blockquote>
<hr>
<h2><a name="tasks">Built in tasks</a></h2>
<ul>
  <li><a href="#ant">Ant</a></li>
  <li><a href="#chmod">Chmod</a></li>
  <li><a href="#copydir">Copydir</a></li>
  <li><a href="#copyfile">Copyfile</a></li>
  <li><a href="#cvs">Cvs</a></li>
  <li><a href="#delete">Delete</a></li>
  <li><a href="#deltree">Deltree</a></li>
  <li><a href="#echo">Echo</a></li>
  <li><a href="#exec">Exec</a></li>
  <li><a href="#expand">Expand</a></li>
  <li><a href="#get">Get</a></li>
  <li><a href="#gzip">GZip</a></li>
  <li><a href="#jar">Jar</a></li>
  <li><a href="#java">Java</a></li>
  <li><a href="#javac">Javac</a></li>
  <li><a href="#javadoc">Javadoc/Javadoc2</a></li>
  <li><a href="#keysubst">KeySubst</a></li>
  <li><a href="#mkdir">Mkdir</a></li>
  <li><a href="#property">Property</a></li>
  <li><a href="#replace">Replace</a></li>
  <li><a href="#rmic">Rmic</a></li>
  <li><a href="#taskdef">Taskdef</a></li>
  <li><a href="#tstamp">Tstamp</a></li>
  <li><a href="#zip">Zip</a></li>
</ul>
<hr>
<h2><a name="ant">Ant</a></h2>
<h3><b>Description:</b></h3>
<p>Runs Ant on a supplied buildfile. This can be used to build subprojects.</p>
<p>When the <i>antfile</i> attribute is omitted, the file &quot;build.xml&quot;
in the supplied directory (<i>dir</i> attribute) is used.</p>
<p>If no target attribute is supplied, the default target of the new project is
used.</p>
<p>The properties of the current project will be available in the new project.
These properties will override the properties that are set in the new project.
(See also the <a href="#property">properties task</a>).</p>
<h3>Parameters:</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">antfile</td>
    <td valign="top">the buildfile to use.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">the directory to use as a basedir for the new Ant project.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">target</td>
    <td valign="top">the target of the new Ant project that should be executed.</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;ant antfile=&quot;subproject/subbuild.xml&quot; dir=&quot;subproject&quot;
target=&quot;compile&quot; /&gt;</code></p>
<p><code>&lt;ant dir=&quot;subproject&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="chmod">Chmod</a></h2>
<h3>Description</h3>
<p>Changes the permissions of a file. Right now it has efect only under Unix.
The permissions are also UNIX style, like the argument for the chmod command.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the file of which the permissions must be changed.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">perm</td>
    <td valign="top">the new permissions.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;chmod src=&quot;${dist}/start.sh&quot; perm=&quot;ugo+rx&quot;
/&gt;</code></p>
</blockquote>
<p>makes the &quot;start.sh&quot; file readable and executable for anyone on a
UNIX system.</p>
<hr>
<h2><a name="copydir">Copydir</a></h2>
<h3>Description</h3>
<p>Copies a directory tree from the source to the destination.</p>
<p>It is possible to exclude a set of files from the files that are being
copied. This can be done with the <i>ignore</i> attribute. This attribute
contains the names of the files/directories that must be excluded from the copy.
The names specified in the <i>ignore</i> attribute are just names, they do not
contain any path information!</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the directory to copy.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">the directory to copy to.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">ignore</td>
    <td valign="top">comma separated list of filenames/directorynames to ignore.</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;copydir src=&quot;${src}/resources&quot; dest=&quot;${dist}&quot;
/&gt;</code></p>
</blockquote>
<p>copies the directory <code>${src}/resources</code> to <code>${dist}</code>.</p>
<blockquote>
<p><code>&lt;copydir src=&quot;${src}/resources&quot; dest=&quot;${dist}&quot;
ignore=&quot;old, Test.java&quot; /&gt;</code></p>
</blockquote>
<p>copies the directory <code>${src}/resources</code> to <code>${dist}</code>.
All files/directories with the names <code>old</code> and <code>Test.java</code>
are excluded from the copy. When <code>old</code> or <code>Test.java</code> is
the name of a directory, then that whole directory is excluded from the copy.</p>
<hr>
<h2><a name="copyfile">Copyfile</a></h2>
<h3>Description</h3>
<p>Copies a file from the source to the destination. The file is only copied if
the source file is newer than the destination file, or when the destination file
does not exist.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the filename of the file to copy.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">the filename of the file where to copy to.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;copyfile src=&quot;test.java&quot; dest=&quot;subdir/test.java&quot;
/&gt;</code></p>
<p><code>&lt;copyfile src=&quot;${src}/index.html&quot; dest=&quot;${dist}/help/index.html&quot;
/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="cvs">Cvs</a></h2>
<h3>Description</h3>
<p>Checks out a package/module from a <a href="http://www.cyclic.com/">CVS</a>
repository.</p>
<p>When doing automated builds, the <a href="#get">get task</a> should be
preferred, because of speed.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">cvsRoot</td>
    <td valign="top">the CVSROOT variable.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">the directory where the checked out files should be placed.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">package</td>
    <td valign="top">the package/module to check out.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">tag</td>
    <td valign="top">the tag of the package/module to check out.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;cvs cvsRoot=&quot;:pserver:anoncvs@jakarta.apache.org:/home/cvspublic&quot;
package=&quot;jakarta-tools&quot; dest=&quot;${ws.dir}&quot; /&gt;</code></p>
</blockquote>
<p>This checks out the package/module &quot;jakarta-tools&quot; from the CVS
repository pointed to by the cvsRoot attribute, and stores the files in &quot;${ws.dir}&quot;.</p>
<hr>
<h2><a name="delete">Delete</a></h2>
<h3>Description</h3>
<p>Deletes a single file.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">file</td>
    <td valign="top">the file to delete.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;delete file=&quot;/lib/ant.jar&quot; /&gt;</code></p>
<p><code>&lt;delete file=&quot;${ant}&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="deltree">Deltree</a></h2>
<h3>Description</h3>
<p>Deletes a directory with all its files and subdirectories.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">the directory to delete.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;deltree dir=&quot;dist&quot; /&gt;</code></p>
<p><code>&lt;deltree dir=&quot;${dist}&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="echo">Echo</a></h2>
<h3>Description</h3>
<p>Echoes a message to System.out.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">message</td>
    <td valign="top">the message to echo.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;echo message=&quot;Hello world&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="exec">Exec</a></h2>
<h3>Description</h3>
<p>Executes a system command. When the <i>os</i> attribute is specified, then
the command is only executed when Ant is run on one of the specified operating
systems.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">command</td>
    <td valign="top">the command to execute.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">the directory in which the command should be executed.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">os</td>
    <td valign="top">list of Operating Systems on which the command may be
      executed.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">output</td>
    <td valign="top">the file to which the output of the command should be
      redirected.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;exec dir=&quot;${src}&quot; command=&quot;dir&quot; os=&quot;windows&quot;
output=&quot;dir.txt&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="expand">Expand</a></h2>
<h3>Description</h3>
<p>Unzips a zipfile.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">zipfile to expand.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">directory where to store the expanded files.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;expand src=&quot;${tomcat_src}/tools-src.zip&quot; dest=&quot;${tools.home}&quot;
/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="get">Get</a></h2>
<h3>Description</h3>
<p>Gets a file from an URL. When the verbose option is &quot;on&quot;, this task
displays a '.' for every 100 Kb retrieved.</p>
<p>This task should be preferred above the <a href="#cvs">CVS task</a> when
doing automated builds. CVS is significant slower than loading a compressed
archive with http/ftp.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the URL from which to retrieve a file.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">the file where to store the retrieved file.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">verbose</td>
    <td valign="top">show verbose information (&quot;on&quot;/&quot;off&quot;).</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;get src=&quot;http://jakarta.apache.org/&quot; dest=&quot;help/index.html&quot;
/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="gzip">GZip</a></h2>
<h3>Description</h3>
<p>GZips a file.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the file to gzip.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">zipfile</td>
    <td valign="top">the destination file.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;gzip src=&quot;test.tar&quot; zipfile=&quot;test.tar.gz&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="jar">Jar</a></h2>
<h3>Description</h3>
<p>Jars a set of files.</p>
<p>The <i>basedir</i> attribute is the reference directory from where to jar.</p>
<p>When &quot;*&quot; is used for items, all files in the basedir, and its
subdirectories, will be jarred. Otherwise all the files and directories
mentioned in the items list will jarred. When a directory is specified, then all
files within it are also jarred.</p>
<p>With the <i>ignore</i> attribute, you can specify files or directories to
ignore. These files will not be jarred. The items in the <i>ignore</i> attribute
override the items in the <i>items</i> attribute. The names specified in the <i>ignore</i>
attribute are just names, they do not contain any path information!</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">jarfile</td>
    <td valign="top">the jar-file to create.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">basedir</td>
    <td valign="top">the directory from which to jar the files.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">items</td>
    <td valign="top">a comma separated list of the files/directories to jar.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">ignore</td>
    <td valign="top">a comma separated list of the filenames/directorynames to
      exclude from the jar.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">manifest</td>
    <td valign="top">the manifest file to use.</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;jar jarfile=&quot;${dist}/lib/app.jar&quot; basedir=&quot;${build}/classes&quot;
items=&quot;*&quot; /&gt;</code></p>
</blockquote>
<p>jars all files in the <code>${build}/classes</code> directory in a file
called <code>app.jar</code> in the <code>${dist}/lib</code> directory.</p>
<blockquote>
<p><code>&lt;jar jarfile=&quot;${dist}/lib/app.jar&quot; basedir=&quot;${build}/classes&quot;
items=&quot;*&quot; ignore=&quot;Test.class&quot; /&gt;</code></p>
</blockquote>
<p>jars all files in the <code>${build}/classes</code> directory in a file
called <code>app.jar</code> in the <code>${dist}/lib</code> directory.
Files/directories with the name <code>Test.class</code> are excluded.</p>
<hr>
<h2><a name="java">Java</a></h2>
<h3>Description</h3>
<p>Executes a Java class within the running (Ant) VM or forks another VM if
specified.</p>
<p>Be careful that the executed class doesn't call System.exit(), because it
will terminate the VM and thus Ant. In case this happens, it's highly suggested
that you set the fork attribute so that System.exit() stops the other VM and not
the one that is currently running Ant.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">class</td>
    <td valign="top">the Java class to execute.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">args</td>
    <td valign="top">the arguments for the class that is executed.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">fork</td>
    <td valign="top">if enabled triggers the class execution in another VM
      (disabled by default)</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">jvmargs</td>
    <td valign="top">the arguments to pass to the forked VM (ignored if fork is
      disabled)</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;java class=&quot;test.Main&quot; /&gt;</code></p>
<p><code>&lt;java class=&quot;test.Main&quot; args=&quot;-h&quot; /&gt;</code></p>
<p><code>&lt;java class=&quot;test.Main&quot; args=&quot;-h&quot;
fork=&quot;yes&quot; jvmargs=&quot;-Xrunhprof:cpu=samples,file=log.txt,depth=3&quot;
/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="javac">Javac</a></h2>
<h3>Description</h3>
<p>Compiles a source tree within the running (Ant) VM.</p>
<p>The source and destination directory will be recursively scanned for Java
source files to compile. Only Java files that have no corresponding class file
or where the class file is older than the java file will be compiled.</p>
<p>Files in the source tree, that are no java files, are copied to the
destination directory, allowing support files to be located properly in the
classpath.</p>
<p>The directory structure of the source tree should follow the package
hierarchy.</p>
<p>It is possible to use different compilers. This can be selected with the
&quot;build.compiler&quot; property. There are three choices:</p>
<ul>
  <li>classic (the standard compiler of JDK 1.1/1.2)</li>
  <li>modern (the new compiler of JDK 1.3)</li>
  <li>jikes (the <a
    href="http://oss.software.ibm.com/developerworks/opensource/jikes/project">Jikes</a>
    compiler)</li>
</ul>
<p>For JDK 1.1/1.2 is classic the default. For JDK 1.3 is modern the default.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">srcdir</td>
    <td valign="top">location of the java files.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">destdir</td>
    <td valign="top">location where to store the class files.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">classpath</td>
    <td valign="top">the classpath to use.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">bootclasspath</td>
    <td valign="top">location of bootstrap class files.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">extdirs</td>
    <td valign="top">location of installed extensions.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">debug</td>
    <td valign="top">indicates whether there should be compiled with debug
      information (&quot;on&quot;).</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">optimize</td>
    <td valign="top">indicates whether there should be compiled with
      optimization (&quot;on&quot;).</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">deprecation</td>
    <td valign="top">indicates whether there should be compiled with deprecation
      information (&quot;on&quot;).</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;javac srcdir=&quot;${src}&quot; destdir=&quot;${build}&quot; -classpath=&quot;xyz.jar&quot;
-debug=&quot;on&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="javadoc">Javadoc/Javadoc2</a></h2>
<h3>Description</h3>
<p>Generates code documentation using the javadoc tool.</p>
<p>The source directory will be recursively scanned for Java
source files to but only those matching the inclusion rules will be passed to
the javadoc tool. This allows wildcards to be used to choose between package
names, reducing verbosity and management costs over time. This task, however,
has no notion of &quot;changed&quot; files, unlike the <a href="#javac">javac</a>
task, but it's not used so frequently.</p>
<p>This task works seamlessly between different javadoc versions (1.1 and 1.2),
with the obvious restriction that the 1.2 attributes will be ignored if run in a
1.1 VM.</p>
<p>NOTE: since javadoc calls System.exit(), we cannot run javadoc inside the
same VM without breaking functionality. For this reason, this task always forks
the VM. But this is not a performance penalty since javadoc is normally a heavy
application and must be called just once.</p>
<p>DEPRECATION: the javadoc2 task simply points to the javadoc task and it's
there for back compatibility reasons. Since this task will be removed in future
versions, you are strongly encouraged to use <a href="#javadoc">javadoc</a>
instead.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Availability</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">sourcepath</td>
    <td valign="top">Specify where to find source files</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">yes</td>
  </tr>
  <tr>
    <td valign="top">destdir</td>
    <td valign="top">Destination directory for output files</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">yes</td>
  </tr>
  <tr>
    <td valign="top">sourcefiles</td>
    <td valign="top">Space separated list of source files</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="middle" rowspan="2">at least one of the two</td>
  </tr>
  <tr>
    <td valign="top">packagenames</td>
    <td valign="top">Space separated list of package files (with terminating
      wildcard)</td>
    <td align="center" valign="top">all</td>
  </tr>
  <tr>
    <td valign="top">Classpath</td>
    <td valign="top">Specify where to find user class files</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Bootclasspath</td>
    <td valign="top">Override location of class files loaded by the bootstrap class loader</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Extdirs</td>
    <td valign="top">Override location of installed extensions</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Overview</td>
    <td valign="top">Read overview documentation from HTML file</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Public</td>
    <td valign="top">Show only public classes and members</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Protected</td>
    <td valign="top">Show protected/public classes and members (default)</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Package</td>
    <td valign="top">Show package/protected/public classes and members</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Private</td>
    <td valign="top">Show all classes and members</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Old</td>
    <td valign="top">Generate output using JDK 1.1 emulating doclet</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Verbose</td>
    <td valign="top">Output messages about what Javadoc is doing</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Locale</td>
    <td valign="top">Locale to be used, e.g. en_US or en_US_WIN</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Encoding</td>
    <td valign="top">Source file encoding name</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Version</td>
    <td valign="top">Include @version paragraphs</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Use</td>
    <td valign="top">Create class and package usage pages</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Author</td>
    <td valign="top">Include @author paragraphs</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Splitindex</td>
    <td valign="top"> Split index into one file per letter</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Windowtitle</td>
    <td valign="top">Browser window title for the documenation (text)</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Doctitle</td>
    <td valign="top">     Include title for the package index(first) page
      (html-code)</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Header</td>
    <td valign="top">       Include header text for each page (html-code)</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">Footer</td>
    <td valign="top">       Include footer text for each page (html-code)</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">bottom</td>
    <td valign="top">       Include bottom text for each page (html-code)</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">link</td>
    <td valign="top">               Create links to javadoc output at the given
      URL</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">linkoffline</td>
    <td valign="top"> Link to docs at &lt;url&gt; using package list at &lt;url2></td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">group</td>
    <td valign="top"> Group specified packages together in overview page</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">nodeprecated</td>
    <td valign="top">             Do not include @deprecated information</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">nodeprecatedlist</td>
    <td valign="top">         Do not generate deprecated list</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">notree</td>
    <td valign="top">                   Do not generate class hierarchy</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">noindex</td>
    <td valign="top">                  Do not generate index</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">nohelp</td>
    <td valign="top">                   Do not generate help link</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">nonavbar</td>
    <td valign="top">                 Do not generate navigation bar</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">serialwarn</td>
    <td valign="top">               Generate warning about @serial tag</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">helpfile</td>
    <td valign="top">Specifies the HTML help file to use</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">stylesheetfile</td>
    <td valign="top">Specifies the CSS stylesheet to use</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">charset</td>
    <td valign="top">        Charset for cross-platform viewing of generated documentation</td>
    <td align="center" valign="top">1.2</td>
    <td align="center" valign="top">no</td>
  </tr>
  <tr>
    <td valign="top">docencoding</td>
    <td valign="top">Output file encoding name</td>
    <td align="center" valign="top">1.1</td>
    <td align="center" valign="top">no</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<pre>&lt;javadoc packagenames=&quot;com.dummy.test.*&quot; 
         sourcepath=&quot;src&quot; 
         destdir=&quot;docs/api&quot;
         author=&quot;true&quot;
         version=&quot;true&quot;
         use=&quot;true&quot;
         windowtitle=&quot;Test API&quot;
         doctitle=&quot;&lt;h1&gt;Test&lt;/h1&gt;&quot;
         bottom=&quot;&lt;i&gt;Copyright &amp;#169; 2000 Dummy Corp. All Rights Reserved.&lt;/i&gt;&quot;
/&gt;</pre>
</blockquote>
<hr>
<h2><a name="keysubst">KeySubst</a></h2>
<h3>Description</h3>
<p>Performs keyword substitution in the source file, and writes the result to
the destination file.</p>
<p>Keys in the source file are of the form ${keyname}. The <i>keys</i> attribute
contains key/value pairs. When a key is found in the <i>keys</i> attribute, then
&quot;${keyname}&quot; is replaced by the corresponding value.</p>
<p>The <i>keys</i> attribute is of the form
&quot;name1=value1*name2=value2*name3=value3&quot;. The '*' is called the
separator, which might we changed with the <i>sep</i> attribute.</p>
<p>Note: the source file and destination file may not be the same.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">src</td>
    <td valign="top">the source file.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">dest</td>
    <td valign="top">the destination file.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">sep</td>
    <td valign="top">the separator for the name/value pairs.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">keys</td>
    <td valign="top">name/value pairs for replacement.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;keysubst src=&quot;abc.txt&quot; dest=&quot;def.txt&quot;
keys=&quot;VERSION=1.0.3*DATE=2000-01-10&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="mkdir">Mkdir</a></h2>
<h3>Description</h3>
<p>Creates a directory. Also non-existent parent directories are created, when
necessary.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">the directory to create.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;mkdir dir=&quot;${dist}&quot; /&gt;</code></p>
<p><code>&lt;mkdir dir=&quot;${dist}/lib&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="property">Property</a></h2>
<h3>Description</h3>
<p>Sets a property (by name and value), or set of properties (from file or
resource) in the project.</p>
<p>When a property was set by the user, or was a property in a parent project
(that started this project with the <a href="#ant">ant task</a>), then this
property cannot be set, and will be ignored. This means that properties set
outside the current project always override the properties of the current
project.</p>
<p>There are three ways to set properties:</p>
<ul>
  <li>By supplying both the <i>name</i> and <i>value</i> attribute.</li>
  <li>By setting the <i>file</i> attribute with the filename of the property
    file to load. This property file has the format as defined by the file used
    in the class java.util.Properties.</li>
  <li>By setting the <i>resource</i> attribute with the resource name of the
    property file to load. This property file has the format as defined by the
    file used in the class java.util.Properties.</li>
</ul>
<p>Although combinations of the three ways are possible, only one should be used
at a time. Problems might occur with the order in which properties are set, for
instance.</p>
<p>The value part of the properties being set, might contain references to other
properties. These references are resolved at the time these properties are set.
This also holds for properties loaded from a property file.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">name</td>
    <td valign="top">the name of the property to set.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">value</td>
    <td valign="top">the value of the property.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">resource</td>
    <td valign="top">the resource name of the property file.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">file</td>
    <td valign="top">the filename of the property file .</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;property name=&quot;foo.dist&quot; value=&quot;dist&quot;/&gt;</code></p>
<p><code>&lt;property file=&quot;foo.properties&quot; /&gt;</code></p>
<p><code>&lt;property resource=&quot;foo.properties&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="replace">Replace</a></h2>
<h3>Description</h3>
<p>Replaces the occurrence of a given string with another string in a file. When
the <i>value</i> attribute is omitted, it defaults to &quot;&quot;.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">file</td>
    <td valign="top">file for which the token should be replaced</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">token</td>
    <td valign="top">the token which must be replaced</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">value</td>
    <td valign="top">the new value for the token</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;replace file=&quot;${src}/index.html&quot; token=&quot;@@@&quot;
value=&quot;wombat&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="rmic">Rmic</a></h2>
<h3>Description</h3>
<p>Runs the rmic compiler for a certain class.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">base</td>
    <td valign="top">the location to store the compiled files.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">class</td>
    <td valign="top">the class for which to run <code>rmic</code>.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;rmic class=&quot;com.xyz.FooBar&quot;
base=&quot;${build}/classes&quot; /&gt;</code></p>
</blockquote>
<hr>
<h2><a name="taskdef">Taskdef</a></h2>
<h3>Description</h3>
<p>Adds a task definition to the current project, such that this new task can be
used in the current project. Two attributes are needed, the name that identifies
this task uniquely, and the full name of the class (including the packages) that
implements this task.</p>
<p>Taskdef should be used to add your own tasks to the system. See also &quot;<a
href="#writingowntask">Writing your own task</a>&quot;.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">name</td>
    <td valign="top">the name of the task</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">class</td>
    <td valign="top">the full class name implementing the task</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;taskdef name=&quot;myjavadoc&quot; value=&quot;com.mydomain.JavadocTask&quot;
/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="tstamp">Tstamp</a></h2>
<h3>Description</h3>
<p>Sets the DSTAMP, TSTAMP and TODAY properties in the current project. The DSTAMP is
in the &quot;yyyymmdd&quot; format, the TSTAMP is in the &quot;hhmm&quot; format
and TODAY is &quot;month day year&quot;.</p>
<p>These properties can be used in the buildfile, for instance, to create
timestamped filenames or used to replace placeholder tags inside documents to
indicate, for example, the release date. The best place for this task is in the <a
href="#inittarget">init target</a>.</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;tstamp/&gt;</code></p>
</blockquote>
<hr>
<h2><a name="zip">Zip</a></h2>
<h3>Description</h3>
<p>Creates a zipfile.</p>
<p>The <i>basedir</i> attribute is the reference directory from where to zip.</p>
<p>When &quot;*&quot; is used for items, all files in the basedir, and its
subdirectories, will be zipped. Otherwise all the files and directories
mentioned in the items list will zipped. When a directory is specified, then all
files within it are also zipped.</p>
<p>With the <i>ignore</i> attribute, you can specify names of files or
directories to ignore. These files will not be zipped. The items in the <i>ignore</i>
attribute override the items in the <i>items</i> attribute. The names specified
in the <i>ignore</i> attribute are just names, they do not contain any path
information!</p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td valign="top" align="center"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">zipfile</td>
    <td valign="top">the zip-file to create.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">basedir</td>
    <td valign="top">the directory from which to zip the files.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">items</td>
    <td valign="top">a comma separated list of the files/directories to zip.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">ignore</td>
    <td valign="top">a comma separated list of the filenames/directorynames to
      exclude from the zip.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<blockquote>
<p><code>&lt;zip zipfile=&quot;${dist}/manual.zip&quot; basedir=&quot;htdocs/manual&quot;
items=&quot;*&quot; /&gt;</code></p>
</blockquote>
<p>zips all files in the <code>htdocs/manual</code> directory in a file called <code>manual.zip</code>
in the <code>${dist}</code> directory.</p>
<blockquote>
<p><code>&lt;zip zipfile=&quot;${dist}/manual.zip&quot; basedir=&quot;htdocs/manual&quot;
items=&quot;*&quot; ignore=&quot;mydocs, todo.html&quot;/&gt;</code></p>
</blockquote>
<p>zips all files in the <code>htdocs/manual</code> directory in a file called <code>manual.zip</code>
in the <code>${dist}</code> directory. Files/directories with the names <code>mydocs</code>
and <code>todo.html</code> are excluded.</p>
<hr>
<h2><a name="writingowntask">Writing your own task</a></h2>
<p>It is very easy to write your own task:</p>
<ol>
  <li>Create a Java class that extends <code>org.apache.tools.ant.Task</code>.</li>
  <li>For each attribute, write a setter method. The setter method must be a <code>public
    void</code> method that takes one <code>String</code> as an argument. The
    name of the method must begin with &quot;set&quot;, followed by the
    attribute name, with the first character in uppercase, and the rest in
    lowercase.</li>
  <li>Write a <code>public void execute</code> method, with no arguments, that
    throws a <code>BuildException</code>. This method implements the task
    itself.</li>
</ol>
<p>It is important to know that Ant first calls the setters for the attributes
it encounters for a specific task in the buildfile, before it executes is.</p>
<p>Let's write our own task, that prints a message on the System.out stream. The
task has one attribute called &quot;message&quot;.</p>
<blockquote>
<pre>public class MyVeryOwnTask extends Task {
  private String msg;

  // The method executing the task
  public void execute() throws BuildException {
    System.out.println(message);
  }

  // The setter for the &quot;message&quot; attribute
  public void setMessage(String msg) {
    this.msg = msg;
  }
}</pre>
</blockquote>
<p>It's really this simple;-)</p>
<p>Adding your task to the system is rather simple too:</p>
<ol>
  <li>Make sure the class that implements your task is in the classpath when
    starting Ant.</li>
  <li>In the <i>init</i> target, add a <i>taskdef</i> task. This actually adds
    your task to the system.</li>
  <li>Use your task in the rest of the buildfile.</li>
</ol>
<h3>Example</h3>
<blockquote>
<pre>&lt;project name=&quot;TaskTest&quot; default=&quot;test&quot; basedir=&quot;.&quot;&gt;
  &lt;target name=&quot;init&quot;&gt;
    &lt;taskdef name=&quot;mytask&quot; class=&quot;com.mydomain.MyVeryOwnTask&quot;/&gt;
  &lt;/target&gt;

  &lt;target name=&quot;test&quot;&gt;
    &lt;mytask myattr=&quot;wombat&quot; /&gt;
  &lt;/target&gt;
&lt;/project&gt;
</pre>
</blockquote>
<p>Another way to add a task (more permanently), is to add the task name and
implementing class name to the <code>default.properties</code> file in the <code>org.apache.tools.ant.taskdefs</code>
package. Then you can use it as if it were a built in task.</p>
<hr>
<h2><a name="feedback">Feedback</a></h2>
<p>To provide feedback on this software, please subscribe to the Ant Development
Mail List <a href="mailto:(ant-dev-subscribe@jakarta.apache.org">(ant-dev-subscribe@jakarta.apache.org</a>)</p>
<hr>
<p align="center">Copyright &copy; 2000 Apache Software Foundation. All
rights Reserved.</p>

</body>

</html>