Оформить svn с помощью gradle

Я хочу проверить svn с помощью gradle. По примеру я написал это

task dwnSnark << {
    ant.path(id: 'svnant') {
        ant.pathelement(location: 'antlib/svnClientAdapter.jar')
        ant.pathelement(location: 'antlib/svnant.jar')
        ant.pathelement(location: 'antlib/svnkit.jar')
    }
    ant.taskdef(resource: 'org/tigris/subversion/svnant/svnantlib.xml', classpathref: 'svnant')
    mkdir('destpath')
    ant.svn(javahl: 'false', svnkit: 'true', username: 'user', password: 'pass', failonerror: 'false') {//this is actually line: 37 from stacktrace
        ant.checkout(url: 'svn://code.threerings.net/snark/trunk', destPath: 'destpath')
        ant.update(dir: 'destpath')
    }
}

Но когда я его выполняю. Выдает исключение.

gradle dwnSnark --stacktrace
:dwnSnark
[ant:taskdef] Could not load definitions from resource org/tigris/subversion/svnant/svnantlib.xml. It could not be found.

FAILURE: Build failed with an exception.

* Where:
Build file 'D:\prog\wint2012\build.gradle' line: 37

* What went wrong:
Execution failed for task ':dwnSnark'.
Cause: Problem: failed to create task or type svn
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any / declarations have taken place.


* Try:
Run with --info or --debug option to get more log output.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':dwnSnark'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:71)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:48)
        at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:34)
        at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter$1.run(CacheLockHandlingTaskExecuter.java:34)
        at org.gradle.cache.internal.DefaultCacheAccess$2.create(DefaultCacheAccess.java:200)
        at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:172)
        at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:198)
        at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:111)
        at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.longRunningOperation(DefaultTaskArtifactStateCacheAccess.java:83)
        at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter.execute(CacheLockHandlingTaskExecuter.java:32)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:41)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:42)
        at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:243)
        at org.gradle.execution.DefaultTaskGraphExecuter.executeTask(DefaultTaskGraphExecuter.java:192)
        at org.gradle.execution.DefaultTaskGraphExecuter.doExecute(DefaultTaskGraphExecuter.java:177)
        at org.gradle.execution.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:83)
        at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:36)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
        at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
        at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
        at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter$1.run(TaskCacheLockHandlingBuildExecuter.java:31)
        at org.gradle.cache.internal.DefaultCacheAccess$1.create(DefaultCacheAccess.java:111)
        at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:126)
        at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:109)
        at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:103)
        at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.useCache(DefaultTaskArtifactStateCacheAccess.java:79)
        at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter.execute(TaskCacheLockHandlingBuildExecuter.java:29)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
        at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
        at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
        at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
        at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:152)
        at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:108)
        at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:76)
        at org.gradle.launcher.cli.RunBuildAction.execute(RunBuildAction.java:42)
        at org.gradle.launcher.cli.RunBuildAction.execute(RunBuildAction.java:28)
        at org.gradle.launcher.exec.ExceptionReportingAction.execute(ExceptionReportingAction.java:32)
        at org.gradle.launcher.exec.ExceptionReportingAction.execute(ExceptionReportingAction.java:21)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLoggingAction.execute(CommandLineActionFactory.java:238)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLoggingAction.execute(CommandLineActionFactory.java:222)
        at org.gradle.launcher.Main.doAction(Main.java:48)
        at org.gradle.launcher.exec.EntryPoint$1.execute(EntryPoint.java:53)
        at org.gradle.launcher.exec.EntryPoint$1.execute(EntryPoint.java:51)
        at org.gradle.launcher.exec.Execution.execute(Execution.java:28)
        at org.gradle.launcher.exec.EntryPoint.run(EntryPoint.java:39)
        at org.gradle.launcher.Main.main(Main.java:39)
        at org.gradle.launcher.ProcessBootstrap.runNoExit(ProcessBootstrap.java:51)
        at org.gradle.launcher.ProcessBootstrap.run(ProcessBootstrap.java:33)
        at org.gradle.launcher.GradleMain.main(GradleMain.java:24)
Caused by: : Problem: failed to create task or type svn
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any / declarations have taken place.

        at org.apache.tools.ant.UnknownElement.getNotFoundException(UnknownElement.java:487)
        at org.apache.tools.ant.UnknownElement.makeObject(UnknownElement.java:419)
        at org.apache.tools.ant.UnknownElement.maybeConfigure(UnknownElement.java:163)
        at org.gradle.api.internal.project.ant.BasicAntBuilder.nodeCompleted(BasicAntBuilder.java:71)
        at org.gradle.api.internal.project.ant.BasicAntBuilder.doInvokeMethod(BasicAntBuilder.java:86)
        at org.gradle.api.internal.project.DefaultAntBuilder.super$3$invokeMethod(DefaultAntBuilder.groovy)
        at org.gradle.api.internal.project.DefaultAntBuilder.invokeMethod(DefaultAntBuilder.groovy:37)
        at build_7tvcf1h4gb2jnh1u2q10f79imq$_run_closure4.doCall(D:\prog\wint2012\JTor\build.gradle:37)
        at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:457)
        at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:445)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:63)
        ... 54 more


BUILD FAILED

Total time: 6.354 secs

В чем я ошибаюсь?