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Topic: Ant Biuld Tool |
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| Ant Biuld Tool |
What's Ant?
Apache Ant is a Java-based build tool. It is kind of like make, without make's wrinkles.
Ant is to drive processes described in build files as targets and extension points dependent upon each other. The main known usage of Ant is the build of Java applications. Ant supplies a number of built-in tasks allowing to compile, assemble, test and run Java applications. Ant can also be used effectively to build non Java applications, for instance C or C++ applications. More generally, Ant can be used to pilot any type of process which can be described in terms of targets and tasks.
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| Why another build tool? |
Instead of a model where it is extended with shell-based commands, Ant 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 that implements a particular Task interface.
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| System requirements |
1) TDK 1.5 or later
2) To build and use Ant, you must have a JAXP-compliant XML parser installed and available on your classpath, such as Xerces. The binary distribution of Ant includes the latest version of the Apache Xerces2 XML parser. Please see http://java.sun.com/xml/ for more information about JAXP. If you wish to use a different JAXP-compliant parser, you should remove xercesImpl.jar and xml-apis.jar from Ant's lib directory.
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| Environment setup |
Before you can run Ant there is some additional set up you will need to do:
1) PATH -- Add the bin directory to your path.
2) ANT_HOME -- Set the ANT_HOME environment variable to the directory where you installed Ant.
3) JAVA_HOME -- Optionally, set the JAVA_HOME environment variable to the directory where your JDK is installed.
You can make the change statically via computer system administration or dynamically via command line settings which is good for the current CMD session:
Windows and OS/2
Assume Ant is installed in c:\ant\. The following sets up the environment:
set ANT_HOME=c:\ant
set JAVA_HOME=c:\jdk-1.5.0.05
set PATH=%PATH%;%ANT_HOME%\bin
Linux/Unix(bash)
Assume Ant is installed in /usr/local/ant. The following sets up the environment:
export ANT_HOME=/usr/local/ant
export JAVA_HOME=/usr/local/jdk-1.5.0.05
export PATH=${PATH}:${ANT_HOME}/bin
Linux/Unix(csh)
setenv ANT_HOME /usr/local/ant
setenv JAVA_HOME /usr/local/jdk/jdk-1.5.0.05
set path=( $path $ANT_HOME/bin )
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| Check Installation |
You can check the basic installation with opening a new shell and typing ant. You should get a message like this
C:\ant
Buildfile: build.xml does not exist!
Build failed
So Ant works. This message is there because you need to write an individual buildfile for your project. With a ant -version you should get an output like
C:\ant -version
Apache Ant version 1.8.0 compiled on February 1 2010
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| Simple Buildfile -- mkdir.xml |
<project name="MyProject" default="init" basedir=".">
<description>
simple example to create a directory
</description>
<!-- set global properties -->
<property name="dist" location="newSubDir"/>
<target name="init">
<!-- Create the directory -->
<mkdir dir="${dist}"/>
</target>
</project>
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| How to use it? |
C:\temp\ant-sample>ant -f mkdir.xml
Buildfile: C:\temp\ant-sample\mkdir.xml
init:
[mkdir] Created dir: C:\temp\ant-sample\newSubDir
BUILD SUCCESSFUL
Total time: 0 seconds
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posted on: 04/19/2010 03:35:49 PM
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