| <?xml version="1.0"?> |
| <document> |
| |
| <properties> |
| <author email="jbjk@mac.com">John Keyes</author> |
| <title>Processing Ants' Command Line</title> |
| </properties> |
| |
| <body> |
| <section name="Introduction"> |
| <p> |
| By default, CLI uses a POSIX style argument parser. This parser |
| only provides support for single character options. To provide |
| support for an application like <a href="http://jakarta.apache.org/ant">Ant</a> |
| it is necessary to use the GNU style argument parser. This provides |
| support for multi character options. Read on to discover how to |
| configure this parser and also how to process the command line options. |
| </p> |
| </section> |
| <section name="Configuring the GNU Parser"> |
| <p> |
| CLI provides support for multiple parsers. The |
| <code>org.apache.commons.cli.parser</code> system property is used |
| to determine what parser to use. To change the parser set the |
| system property to the class name of the required parser. |
| </p> |
| <source> |
| // configure CLI to use the GNU Parser |
| System.setProperty( "org.apache.commons.cli.parser", |
| "org.apache.commons.cli.GnuParser" );</source> |
| </section> |
| <section name="Creating the Ant Options"> |
| <p> |
| There are three types of Options used in Ant. They are: |
| <ul> |
| <li>boolean option - the option is either present or not</li> |
| <li>value option - the option is present and requires a value</li> |
| <li>property option - the same style as Java system properties. |
| For example, "-Dproperty=value".</li> |
| </ul> |
| </p> |
| </section> |
| </body> |
| </document> |
