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-<!--
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You under the Apache License, Version 2.0
- (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
--->
-<html>
-
- <head>
- <meta http-equiv="Content-Language" content="en-us"></meta>
- <link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
- <title>AntLib</title>
- </head>
-
- <body>
- <h2><a name="antlib">Antlib</a></h2>
-
-
- <h3>Description</h3>
- <p>
- An antlib file is an xml file with a root element of "antlib".
- Antlib's elements are Apache Ant definition tasks - like
- <a href="../Tasks/taskdef.html">Taskdef</a>
- or any Ant task that extends
- <code>org.apache.tools.ant.taskdefs.AntlibDefinition</code>.
- </p>
- <p>
- The current set of declarations bundled with Ant that do this are:
- </p>
- <ol>
- <li><a href="../Tasks/typedef.html">Typedef</a>
- </li>
- <li><a href="../Tasks/taskdef.html">Taskdef</a>
- </li>
- <li><a href="../Tasks/macrodef.html">Macrodef</a>
- </li>
- <li><a href="../Tasks/presetdef.html">Presetdef</a>
- </li>
- <li><a href="../Tasks/scriptdef.html">Scriptdef</a>
- </li>
- </ol>
- <p>
- A group of tasks and types may be defined together in an antlib
- file. For example the file <i>sample.xml</i> contains the following:
- </p>
- <blockquote>
- <pre>
-&lt;?xml version="1.0"?&gt;
-&lt;antlib&gt;
- &lt;typedef name="if" classname="org.acme.ant.If"/&gt;
- &lt;typedef name="scriptpathmapper"
- classname="org.acme.ant.ScriptPathMapper"
- onerror="ignore"/&gt;
- &lt;macrodef name="print"&gt;
- &lt;attribute name="file"/&gt;
- &lt;sequential&gt;
- &lt;concat taskname="print"&gt;
- &lt;fileset dir="." includes="@{file}"/&gt;
- &lt;/concat&gt;
- &lt;/sequential&gt;
- &lt;/macrodef&gt;
-&lt;/antlib&gt;
- </pre>
- </blockquote>
- <p>
- It defines two types or tasks, <i>if</i> and <i>scriptpathmapper</i>.
- This antlib file may be used in a build script as follows:
- </p>
- <blockquote>
- <pre>
-&lt;typedef file="sample.xml"/&gt;
- </pre>
- </blockquote>
- <p>
- The other attributes of <code>&lt;typedef&gt;</code> may be used as well.
- For example, assuming that the <i>sample.xml</i> is in a jar
- file <i>sample.jar</i> also containing the classes, the
- following build fragment will define the <i>if</i> and <i>scriptpathmapper</i>
- tasks/types and place them in the namespace uri <i>samples:/acme.org</i>.
- </p>
- <blockquote>
- <pre>
-&lt;typedef resource="org/acme/ant/sample.xml"
- uri="samples:/acme.org"/&gt;
- </pre>
- </blockquote>
- <p>
- The definitions may then be used as follows:
- </p>
- <blockquote>
- <pre>
-&lt;sample:if valuetrue="${props}" xmlns:sample="samples:/acme.org"&gt;
- &lt;sample:scriptpathmapper language="beanshell"&gt;
- some bean shell
- &lt;/sample:scriptpathmapper&gt;
-&lt;/sample:if&gt;
- </pre>
- </blockquote>
-
-
- <h3><a name="antlibnamespace">Antlib namespace</a></h3>
- <p>
- The name space URIs with the pattern <b>antlib:<i>java package</i></b>
- are given special treatment.
- </p>
- <p>
- When Ant encounters a element with a namespace URI with this pattern, it
- will check to see if there is a resource of the name <i>antlib.xml</i> in
- the package directory in the default classpath.
- </p>
- <p>
- For example, assuming that the file <i>antcontrib.jar</i> has been placed
- in the directory <i>${ant.home}/lib</i> and it contains the resource
- <i>net/sf/antcontrib/antlib.xml</i> which has all antcontrib's definitions
- defined, the following build file will automatically load the antcontrib
- definitions at location <i>HERE</i>:
- </p>
- <blockquote>
- <pre>
-&lt;project default="deletetest" xmlns:antcontrib="antlib:net.sf.antcontrib"&gt;
- &lt;macrodef name="showdir"&gt;
- &lt;attribute name="dir"/&gt;
- &lt;sequential&gt;
- &lt;antcontrib:shellscript shell="bash"&gt; &lt;!-- HERE --&gt;
- ls -Rl @{dir}
- &lt;/antcontrib:shellscript&gt;
- &lt;/sequential&gt;
- &lt;/macrodef&gt;
-
- &lt;target name="deletetest"&gt;
- &lt;delete dir="a" quiet="yes"/&gt;
- &lt;mkdir dir="a/b"/&gt;
- &lt;touch file="a/a.txt"/&gt;
- &lt;touch file="a/b/b.txt"/&gt;
- &lt;delete&gt;
- &lt;fileset dir="a"/&gt;
- &lt;/delete&gt;
- &lt;showdir dir="a"/&gt;
- &lt;/target&gt;
-&lt;/project&gt;
- </pre>
- </blockquote>
- <p>
- The requirement that the resource is in the default classpath
- may be removed in future versions of Ant.</p>
- </p>
-
-
- <h3><a name="loadFromInside">Load antlib from inside of the buildfile</a></h3>
- <p>
- If you want to separate the antlib from your local Ant installation, e.g. because you
- want to hold that jar in your projects SCM system, you have to specify a classpath, so
- that Ant could find that jar. The best solution is loading the antlib with <tt>&lt;taskdef&gt;</tt>.
- </p>
- <blockquote>
- <pre>
-&lt;project xmlns:<font color="green">antcontrib</font>="<font color="red">antlib:net.sf.antcontrib</font>"&gt;
- &lt;taskdef uri="<font color="red">antlib:net.sf.antcontrib</font>"
- resource="net/sf/antcontrib/antlib.xml"
- classpath="path/to/ant-contrib.jar"/&gt;
-
- &lt;target name="iterate"&gt;
- &lt;<font color="green">antcontrib</font>:for param="file"&gt;
- &lt;fileset dir="."/&gt;
- &lt;sequential&gt;
- &lt;echo message="- @{file}"/&gt;
- &lt;/sequential&gt;
- &lt;/antcontrib:for&gt;
- &lt;/target&gt;
-&lt;/project&gt;
- </pre>
- </blockquote>
-
-
-
-
- <h3><a name="currentnamespace">Current namespace</a></h3>
- <p>
- Definitions defined in antlibs may be used in antlibs. However
- the namespace that definitions are placed in are dependent on
- the <code>&lt;typedef&gt;</code> that uses the antlib. To deal with this
- problem, the definitions are placed in the namespace URI <i>ant:current</i>
- for the duration of the antlib execution.
- For example the following antlib defines the task <code>&lt;if&gt;</code>, the
- type <code>&lt;isallowed&gt;</code> and a macro
- <code>&lt;ifallowed&gt;</code> that makes use of the task and type:
- </p>
- <blockquote>
- <pre>
-&lt;antlib xmlns:current="ant:current"&gt;
- &lt;taskdef name="if" classname="org.acme.ant.If"/&gt;
- &lt;typedef name="isallowed" classname="org.acme.ant.Isallowed"/&gt;
- &lt;macrodef name="ifallowed"&gt;
- &lt;attribute name="action"/&gt;
- &lt;element name="do"/&gt;
- &lt;sequential&gt;
- &lt;current:if&gt;
- &lt;current:isallowed test="@{action}"/&gt;
- &lt;current:then&gt;
- &lt;do/&gt;
- &lt;/current:then&gt;
- &lt;/current:if&gt;
- &lt;/sequential&gt;
- &lt;/macrodef&gt;
-&lt;/antlib&gt;
- </pre>
- </blockquote>
-
-
- <h3>Other examples and comments</h3>
- <p>
- Antlibs may make use of other antlibs.
- </p>
- <p>
- As the names defined in the antlib are in the namespace uri as
- specified by the calling <code>&lt;typedef&gt;</code> or by automatic element
- resolution, one may reuse names from core ant types and tasks,
- provided the caller uses a namespace uri. For example, the
- following antlib may be used to define defaults for various
- tasks:
- </p>
- <blockquote>
- <pre>
-&lt;antlib xmlns:antcontrib="antlib:net.sf.antcontrib"&gt;
- &lt;presetdef name="javac"&gt;
- &lt;javac deprecation="${deprecation}"
- debug="${debug}"/&gt;
- &lt;/presetdef&gt;
- &lt;presetdef name="delete"&gt;
- &lt;delete quiet="yes"/&gt;
- &lt;/presetdef&gt;
- &lt;presetdef name="shellscript"&gt;
- &lt;antcontrib:shellscript shell="bash"/&gt;
- &lt;/presetdef&gt;
-&lt;/antlib&gt;
- </pre>
- </blockquote>
- <p>
- This may be used as follows:
- </p>
- <blockquote>
- <pre>
-&lt;project xmlns:local="localpresets"&gt;
- &lt;typedef file="localpresets.xml" uri="localpresets"/&gt;
- &lt;local:shellscript&gt;
- echo "hello world"
- &lt;/local:shellscript&gt;
-&lt;/project&gt;
- </pre>
- </blockquote>
-
-
-
-</body>
-</html>
-