gistfile1.txt

dependencies {
  gems 'rubygems:asciidoctor-diagram:1.3.0.preview.3'
  gems 'rubygems:haml:4.0.6'
  gems 'rubygems:thread_safe:0.3.4'
  compile files("$javafxHome/jre/lib/jfxrt.jar")
  compile 'me.champeau.deck2pdf:deck2pdf:0.3.0'
}

ext {
  deckjs_version = '1.0.1'
  deckjsDir = new File(buildDir, 'reveal.js')
  adocDeckjsDir = new File(buildDir, 'asciidoctor-reveal.js')
}

task generatePdf(type:JavaExec) {
    dependsOn asciidoctor
    main = 'me.champeau.deck2pdf.Main'
    workingDir = file("$buildDir/asciidoc/html5")
    args = ['--profile=revealjs','slides.html',"${project.name}.pdf"]





Starting process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/bin/java''. Working directory: /Users/hrupp/tmp/HawkularPresentation/build/asciidoc/html5 Command: /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/bin/java -Dfile.encoding=UTF-8 -Duser.country=DE -Duser.language=de -Duser.variant -cp /Users/hrupp/tmp/HawkularPresentation/build/deck2pdf:/Users/hrupp/tmp/HawkularPresentation/build/classes/main:/Users/hrupp/tmp/HawkularPresentation/build/resources/main:/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/jre/lib/jfxrt.jar:/Users/hrupp/.gradle/caches/modules-2/files-2.1/me.champeau.deck2pdf/deck2pdf/0.3.0/b61ad63b4823801c0abf6f8038acea3120b2878a/deck2pdf-0.3.0.jar:/Users/hrupp/.gradle/caches/modules-2/files-2.1/com.itextpdf/itextpdf/5.5.1/391a5e410f8b95cd90b528ccc9aa618b1aee3b13/itextpdf-5.5.1.jar:/Users/hrupp/.gradle/caches/modules-2/files-2.1/org.codehaus.groovy/groovy/2.4.4/62dc4f50804c40f3233977e2d3d1a4abca60bc41/groovy-2.4.4.jar me.champeau.deck2pdf.Main --profile=revealjs slides.html HawkularPresentation.pdf
Successfully started process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/bin/java''
Error while executing the following code:
Reveal.configure({controls: false, progress: false});
Exception in thread "JavaFX Application Thread" netscape.javascript.JSException: ReferenceError: Can't find variable: Reveal
	at com.sun.webkit.dom.JSObject.fwkMakeException(JSObject.java:128)
	at com.sun.webkit.WebPage.twkExecuteScript(Native Method)
	at com.sun.webkit.WebPage.executeScript(WebPage.java:1427)
	at javafx.scene.web.WebEngine.executeScript(WebEngine.java:948)
	at me.champeau.deck2pdf.GroovyProfile.executeJS(GroovyProfile.java:65)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1210)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1077)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1019)
	at groovy.lang.MetaClassImpl.invokePropertyOrMissing(MetaClassImpl.java:1256)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1212)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1019)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:810)
	at groovy.lang.GroovyObjectSupport.invokeMethod(GroovyObjectSupport.java:46)
	at groovy.lang.Script.invokeMethod(Script.java:80)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeOnDelegationObjects(ClosureMetaClass.java:430)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:369)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1019)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:69)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166)
	at Script1$_run_closure3.doCall(Script1.groovy:11)
	at Script1$_run_closure3.doCall(Script1.groovy)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:294)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1019)
	at groovy.lang.Closure.call(Closure.java:426)
	at groovy.lang.Closure.call(Closure.java:420)
	at me.champeau.deck2pdf.GroovyProfile.setup(GroovyProfile.java:123)
	at me.champeau.deck2pdf.Browser.lambda$doExport$1(Browser.java:134)
	at me.champeau.deck2pdf.Browser$$Lambda$133/1019176460.changed(Unknown Source)
	at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)

compile 'me.champeau.deck2pdf:deck2pdf:0.3.0' should be
pdf 'me.champeau.deck2pdf:deck2pdf:0.3.0'

and you are mixing reveal and deckjs refs.