Using install4j with ant

## Using install4j with ant |
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| Integrating install4j with your ant script (read about ant at ant.apache.org) is easy. Just use the `install4j` task that is provided in `{install4j installation directory}/bin/ant.jar` and set the `projectfile` parameter to the install4j project file that you want to build. To make the `install4j` task available to ant, you must first insert a `taskdef` element that tells ant where to find the task definition. Here is an example of using the task in an ant build file:
          <taskdef name="install4j"
                   classname="com.install4j.Install4JTask"
                   classpath="C:\Program Files\install4j\bin\ant.jar"/>

          <target name="media">
            <install4j projectfile="myapp.install4j"/>
          </target>
The `taskdef` definition must occur only once per ant-build file and can appear anywhere on the top level below the `project` element. Note: it is not possible to copy the `ant.jar` archive to the `lib` folder of your ant distribution. You have to reference a full installation of install4j in the task definition.

| The `install4j` task supports the following parameters:
Attribute | Description | Required
--- | --- | ---
projectfile | The install4j project file that should be build. | Yes
verbose | Corresponds to the `--verbose` command line option. Either `true` or `false`. | No, verbose and quiet cannot both be `true`
quiet | Corresponds to the `--quiet` command line option. Either `true` or `false`.
test | Corresponds to the `--test` command line option. Either `true` or `false`. | No
release | Corresponds to the `--release` command line option. Enter a version number like "`3.1.2`". The version number may only contain numbers and dots. | No
destination | Corresponds to the `--destination` command line option. Enter a directory where the generated media files should be placed. | No
buildselected | Corresponds to the `--build-selected` command line option. Either `true` or `false`. | No
buildids | Corresponds to the `--build-ids` command line option. Enter a list of media file ids. The IDs for media files can be shown in the install4j GUI by choosing Media->Show media file IDs from the main menu when the media file step is visible. | No
mediatypes | Corresponds to the `--media-types` command line option. Enter a list of media types. To see the list of supported media types, execute `install4jc --list-media-types`. | No
variablefile | Corresponds to the `--var-file` command line option. Enter the name of file with variable definitions. | No
Contained elements: The `install4j` task can contain `variable` elements. These elements override user variables in the project and correspond to the `-D` command line option. Definitions with `variable` elements take precedence before definitions in the variable file referenced by the `variablefile` parameter. The `variable` element supports the following parameters:
Attribute | Description | Required
--- | --- | ---
name | The name of the variable. This must be the name of a variable that has been defined on the user variables tab of the general settings step. | Yes
value | The value for the variable. The value may be empty. | Yes
mediafileid | The ID of the media file for which the variable should be overridden. The IDs for media files can be shown in the install4j GUI by choosing Media->Show media file IDs from the main menu when the media file step is visible. | No
Example:
          <install4j projectfile="myapp.install4j">
            <variable name="MYVARIABLE" value="15"/>
            <variable name="OTHERVARIABLE" value="test" mediafileid="8"/>
          </install4j>