Comparison ant task

The comparison ant task can be used to generate comparisons from a number of saved snapshots. For more information please consult the overview.

You can integrate the command line comparison with your ant script (read about ant at ant.apache.org) by using the compare task that is provided in {JProfiler installation directory}/bin/ant.jar.
To make the compare 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="compare"
               classname="com.jprofiler.ant.CompareTask"
               classpath="C:\Program Files\jprofiler4\bin\ant.jar"/>

      <target name="compare">
        <compare sortbytime="true">
          <fileset dir=".">
            <include name="*.jps" />
          </fileset>
          <view name="TelemetryHeap" file="heap.html"/>
          <view name="TelemetryThreads" file="threads.html">
            <option name="measurements" value="inactive,active"/>
            <option name="valuetype" value="bookmark"/>
            <option name="bookmarkname" value="test"/>
          </view>
        </compare>
      </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 JProfiler in the task definition.

The compare task supports the following attributes:

Attribute	Description	Required
listfile	An file that contains a list of snapshot files that should be compared, one snapshot per line. The snapshot from a nested fileset will be prepended.	Only if no nested fileset is specified
sortbytime	Sort all supplied snapshot files by their file modification time.	No
ignoreerrors	Ignore errors that occur when options for a comparison cannot be set and continue with the next comparison. The default value is "false", i.e. the export is terminated, when the first error occurs.	No

The compare task can contain nested fileset elements to specify the snapshots that should be compared. If no fileset is specified, the listfile attribute of the compare task must be set.

The compare task contains a list of comparison elements with the following attributes:

Attribute	Description	Required
name	The comparison name. For a list of available comparison names, please see the help page on the command line executable. extension.	Yes
file	The output file name. The process for the output format selection is described in the overview.	Yes

The comparison element can optionally contain a list of option elements with the following attributes:

Attribute	Description	Required
name	The option name. Each comparison has its own set of options. For a list of available comparison names and the corresponding options, please see the help page on the command line executable.	Yes
value	The value of the option.	Yes