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            <font size="+3" face="arial,helvetica,sanserif"><strong>Subant
 Task</strong></font>
            <br><font face="arial,helvetica,sanserif">Calls a given target for all defined sub-builds.</font>
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          <a name="description">
          <strong>Description</strong></a></font>
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<p>
            Calls a given target for all defined sub-builds.
            This is an extension
            of ant for bulk project execution.

            <strong>This task must no be used outside of a
                <code>target</code> if it invokes the same build file it is
                part of.</strong>
        </p>
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                              <a name="Use with directories">
          <strong>Use with directories</strong></a></font>
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        <p>
                subant can be used with directory sets to execute a build from different directories.
                2 different options are offered :
            </p>
<ul>
                <li>
                    to run the same build file <code>/somepath/otherpath/mybuild.xml</code>
                    with different base directories, use the genericantfile attribute
                </li>
                <li>if you want to run <code>directory1/mybuild.xml</code>, <code>directory2/mybuild.xml</code>, <code>....</code>,
                    use the antfile attribute. The subant task does not set the base directory for you in this case, because you can specify it in each build file.
                </li>
            </ul>

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          <a name="attributes">
          <strong>Parameters</strong></a></font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif"><b>Attribute</b></font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif"><b>Description</b></font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif"><b>Type</b></font>
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        <td bgcolor="#cccccc" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif"><b>Requirement</b></font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">antfile</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Build file name, to use in conjunction with directories.<br/> Defaults to "build.xml".<br/> If <code>genericantfile</code> is set, this attribute is ignored.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">String</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Optional</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">buildpath</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Set the buildpath to be used to find sub-projects.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Path</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">buildpathref</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Buildpath to use, by reference.</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Reference</font>
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    <!-- Attribute -->
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">failonerror</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Sets whether to fail with a build exception on error, or go on.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">boolean</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">genericantfile</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Build file path, to use in conjunction with directories.<br/> Use <code>genericantfile</code>, in order to run the same build file with different basedirs.<br/> If this attribute is set, <code>antfile</code> is ignored.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">File</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">inheritall</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Corresponds to <code>&lt;ant&gt;</code>'s <code>inheritall</code> attribute.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">boolean</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">inheritrefs</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Corresponds to <code>&lt;ant&gt;</code>'s <code>inheritrefs</code> attribute.</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">boolean</font>
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    <!-- Attribute -->
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">output</font>
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        <td bgcolor="#eeeeee" valign="top" align="left">
          <font color="#000000" size="-1" face="arial,helvetica,sanserif">Corresponds to <code>&lt;ant&gt;</code>'s <code>output</code> attribute.</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">String</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">target</font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif"></font>
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          <font color="#000000" size="-1" face="arial,helvetica,sanserif">String</font>
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          <a name="elements">
          <strong>Parameters as nested elements</strong></a></font>
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        <font color="#ffffff" face="arial,helvetica.sanserif" size="-1">
          <strong>dirset</strong> (org.apache.tools.ant.types.DirSet)</font>
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      <tr><td><blockquote>
        Adds a directory set to the implicit build path. <p> <em>Note that the directories will be added to the build path in no particular order, so if order is significant, one should use a file list instead!</em>
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          <strong>filelist</strong> (org.apache.tools.ant.types.FileList)</font>
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      <tr><td><blockquote>
        Adds an ordered file list to the implicit build path. <p> <em>Note that contrary to file and directory sets, file lists can reference non-existent files or directories!</em>
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          <strong>fileset</strong> (org.apache.tools.ant.types.FileSet)</font>
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        Adds a file set to the implicit build path. <p> <em>Note that the directories will be added to the build path in no particular order, so if order is significant, one should use a file list instead!</em>
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          <strong>property</strong> (org.apache.tools.ant.taskdefs.Property)</font>
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      <tr><td><blockquote>
        Corresponds to <code>&lt;ant&gt;</code>'s nested <code>&lt;property&gt;</code> element.
 <!-- Ignore -->
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        <font color="#ffffff" face="arial,helvetica.sanserif" size="-1">
          <strong>propertyset</strong> (org.apache.tools.ant.types.PropertySet)</font>
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      <tr><td><blockquote>
        Corresponds to <code>&lt;ant&gt;</code>'s nested <code>&lt;propertyset&gt;</code> element.
 <!-- Ignore -->
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        <font color="#ffffff" face="arial,helvetica.sanserif" size="-1">
          <strong>buildpath</strong> (org.apache.tools.ant.types.Path)</font>
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        Creates a nested build path, and add it to the implicit build path.
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        <font color="#ffffff" face="arial,helvetica.sanserif" size="-1">
          <strong>buildpathelement</strong> (org.apache.tools.ant.types.Path.PathElement)</font>
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      <tr><td><blockquote>
        Creates a nested <code>&lt;buildpathelement&gt;</code>, and add it to the implicit build path.
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                              <a name="examples">
          <strong>Examples</strong></a></font>
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      <tr><td><blockquote>
        <pre>
        &lt;project name="subant" default="subant1"&gt;
        &lt;property name="build.dir" value="subant.build"/&gt;
        &lt;target name="subant1"&gt;
            &lt;subant target=""&gt;
              &lt;property name="build.dir" value="subant1.build"/&gt;
              &lt;property name="not.overloaded" value="not.overloaded"/&gt;
              &lt;fileset dir="." includes="*/build.xml"/&gt;
            &lt;/subant&gt;
        &lt;/target&gt;
        &lt;/project&gt;
        </pre>
<p>
            this snippet build file will run ant in each subdirectory of the project directory,
            where a file called build.xml can be found.
            The property build.dir will have the value subant1.build in the ant projects called by subant.
        </p>
<pre>
          &lt;subant target=""&gt;
             &lt;propertyset&gt;
                  &lt;propertyref prefix="toplevel"/&gt;
                  &lt;mapper type="glob" from="foo*" to="bar*"/&gt;
             &lt;/propertyset&gt;
             &lt;fileset dir="." includes="*/build.xml"/&gt;
          &lt;/subant&gt;
        </pre>
<p>
            this snippet build file will run ant in each subdirectory of the project directory,
            where a file called build.xml can be found.
            All properties whose name starts with "foo" are passed, their names are changed to start with "bar" instead
        </p>
<pre>
          &lt;subant target="compile" genericantfile="/opt/project/build1.xml"&gt;
             &lt;dirset dir="." includes="projects*"/&gt;
          &lt;/subant&gt;
        </pre>
<p>
            assuming the subdirs of the project dir are called projects1, projects2, projects3
            this snippet will execute the compile target of /opt/project/build1.xml,
            setting the basedir to projects1, projects2, projects3
        </p>

        <!-- manually written -->
        <p>Now a little more complex - but useful - scenario. Assume that we have
        a directory structure like this:</p>
        <pre>
        root
          |  common.xml
          |  build.xml
          |
          +-- modules
                +-- modA
                |     +-- src
                +-- modB
                      +-- src

        <u><b>common.xml:</b></u><br>
        &lt;project&gt;
            &lt;property name="src.dir"      value="src"/&gt;
            &lt;property name="build.dir"    value="build"/&gt;
            &lt;property name="classes.dir"  value="${build.dir}/classes"/&gt;

            &lt;target name="compile"&gt;
                &lt;mkdir dir="${classes.dir}"/&gt;
                &lt;javac srcdir="${src.dir}" destdir="${classes.dir}"/&gt;
            &lt;/target&gt;

            &lt;!-- more targets --&gt;
        &lt;/project&gt;

        <u><b>build.xml:</b></u><br>
        &lt;project&gt;

            &lt;macrodef name="iterate"&gt;
                &lt;attribute name="target"/&gt;
                &lt;sequential&gt;
                    &lt;subant target="@{target}"&gt;
                        &lt;fileset dir="modules" includes="*/build.xml"/&gt;
                    &lt;/subant&gt;
                &lt;/sequential&gt;
            &lt;/macrodef&gt;


            &lt;target name="compile"&gt;
                &lt;iterate target="compile"/&gt;
            &lt;/target&gt;

            &lt;!-- more targets --&gt;
        &lt;/project&gt;

        <u><b>modules/modA/build.xml:</b></u><br>
        &lt;project name="modA"&gt;
            &lt;import file="../../common.xml"/&gt;
        &lt;/project&gt;
        </pre>

        <p>This results in very small buildfiles in the modules, maintainable
        buildfile (common.xml) and a clear project structure. Additionally
        the root buildfile is capable to run the whole build over all
        modules.
        </p>

        <!-- manually written -->

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