Setting Gradle to publish to BinTray

build-ivy.gradle

repositories {
    mavenCentral()
}

apply plugin: 'maven'
apply plugin: 'groovy'
apply plugin: 'idea'

group = 'org.gradle.plugins'
version = "${currentVersion}"

dependencies {
    groovy 'org.codehaus.groovy:groovy-all:1.8.6'
    compile gradleApi()
    
    testCompile "org.spockframework:spock-core:0.6-groovy-1.8"
}

task sourcesJar(type: Jar, dependsOn: classes) {
    classifier = 'sources'
    from sourceSets.main.allSource
}

artifacts {
    archives sourcesJar
}


uploadArchives {
    repositories {
        ivy {
            url = bintray_api_base_url + '/content/' + bintray_username + '/' + bintray_repo + '/' + bintray_package + '/' + version
            credentials {
                username bintray_username
                password bintray_api_key
            }
        }
    }
}

//uploadArchives.dependsOn createBintrayPackage

boolean isSnapshot() {
    currentVersion.endsWith('SNAPSHOT')
}

build-maven.gradle

repositories {
    mavenCentral()
}

apply plugin: 'maven'
apply plugin: 'groovy'
apply plugin: 'idea'

group = 'org.gradle.plugins'
version = "${currentVersion}"

dependencies {
    groovy 'org.codehaus.groovy:groovy-all:1.8.6'
    compile gradleApi()
    
    testCompile "org.spockframework:spock-core:0.6-groovy-1.8"
}

task sourcesJar(type: Jar, dependsOn: classes) {
    classifier = 'sources'
    from sourceSets.main.allSource
}

artifacts {
    archives sourcesJar
}


uploadArchives {
    repositories {
        mavenDeployer {
            repository (
                url: bintray_api_base_url + '/maven/' + bintray_username + '/' + bintray_repo + '/' + bintray_package
            ) {
                authentication(
                    userName: bintray_username,
                    password: bintray_api_key
                )
            }
        }
    }
}

boolean isSnapshot() {
    currentVersion.endsWith('SNAPSHOT')
}

stacktrace.log

* What went wrong:
Execution failed for task ':shadow:uploadArchives'.
> Could not publish configuration 'archives'
   > java.lang.IllegalArgumentException: Illegal character(s) in message header value: Basic am9obnJlbmdlbG1hbjplZDQzYTM5ZTVmOTIyNDdlZWU1NTcyYjBkNjQ0NTZlZDZiOGQ5ZjEwNjI3
     YmU3Y2JkZmE5YmIwZmU4ODlhNmYw

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

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':shadow:uploadArchives'.
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:72)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:49)
	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.internal.Factories$1.create(Factories.java:22)
	at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:179)
	at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:232)
	at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:142)
	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:275)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.executeTask(DefaultTaskPlanExecutor.java:52)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.processTask(DefaultTaskPlanExecutor.java:38)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:30)
	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:84)
	at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.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.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter$1.run(TaskCacheLockHandlingBuildExecuter.java:31)
	at org.gradle.internal.Factories$1.create(Factories.java:22)
	at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:124)
	at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:112)
	at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:134)
	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$2.proceed(DefaultBuildExecuter.java:67)
	at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
	at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
	at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
	at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:165)
	at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
	at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
	at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:38)
	at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:39)
	at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:25)
	at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
	at org.gradle.api.internal.Actions$RunnableActionAdapter.execute(Actions.java:171)
	at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:201)
	at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:174)
	at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:170)
	at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:139)
	at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
	at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
	at org.gradle.launcher.Main.doAction(Main.java:48)
	at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
	at org.gradle.launcher.Main.main(Main.java:39)
	at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50)
	at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:32)
	at org.gradle.launcher.GradleMain.main(GradleMain.java:26)
Caused by: org.gradle.api.artifacts.PublishException: Could not publish configuration 'archives'
	at org.gradle.api.tasks.Upload.upload(Upload.java:91)
	at org.gradle.api.internal.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:216)
	at org.gradle.api.internal.BeanDynamicObject.invokeMethod(BeanDynamicObject.java:122)
	at org.gradle.api.internal.CompositeDynamicObject.invokeMethod(CompositeDynamicObject.java:147)
	at org.gradle.api.tasks.Upload_Decorated.invokeMethod(Unknown Source)
	at org.gradle.util.ReflectionUtil.invoke(ReflectionUtil.groovy:23)
	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:161)
	at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:156)
	at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:510)
	at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:499)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:64)
	... 57 more
Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: Illegal character(s) in message header value: Basic am9obnJlbmdlbG1hbjplZDQzYTM5ZTVmOTIyNDdlZWU1NTcyYjBkNjQ0NTZlZDZiOGQ5ZjEwNjI3
YmU3Y2JkZmE5YmIwZmU4ODlhNmYw
	at org.apache.maven.wagon.providers.http.LightweightHttpWagon.fillInputData(LightweightHttpWagon.java:115)
	at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java:116)
	at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88)
	at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)
	at org.apache.maven.artifact.manager.DefaultWagonManager.getRemoteFile(DefaultWagonManager.java:546)
	at org.apache.maven.artifact.manager.DefaultWagonManager.getArtifactMetadataFromDeploymentRepository(DefaultWagonManager.java:452)
	at org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.getArtifactMetadataFromDeploymentRepository(DefaultRepositoryMetadataManager.java:379)
	at org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.resolveAlways(DefaultRepositoryMetadataManager.java:347)
	at org.apache.maven.artifact.transform.SnapshotTransformation.resolveLatestSnapshotBuildNumber(SnapshotTransformation.java:161)
	at org.apache.maven.artifact.transform.SnapshotTransformation.transformForDeployment(SnapshotTransformation.java:100)
	at org.apache.maven.artifact.transform.DefaultArtifactTransformationManager.transformForDeployment(DefaultArtifactTransformationManager.java:74)
	at org.apache.maven.artifact.deployer.DefaultArtifactDeployer.deploy(DefaultArtifactDeployer.java:86)
	at org.apache.maven.artifact.ant.DeployTask.doExecute(DeployTask.java:125)
	at org.gradle.api.publication.maven.internal.ant.CustomDeployTask.doExecute(CustomDeployTask.java:44)
	at org.apache.maven.artifact.ant.AbstractArtifactTask.execute(AbstractArtifactTask.java:751)
	at org.gradle.api.publication.maven.internal.ant.AbstractMavenResolver.execute(AbstractMavenResolver.java:187)
	at org.gradle.api.publication.maven.internal.ant.AbstractMavenResolver.commitPublishTransaction(AbstractMavenResolver.java:178)
	at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyDependencyPublisher$Publication.publishTo(DefaultIvyDependencyPublisher.java:95)
	at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyDependencyPublisher.publish(DefaultIvyDependencyPublisher.java:54)
	at org.gradle.api.internal.artifacts.ivyservice.IvyBackedArtifactPublisher.publish(IvyBackedArtifactPublisher.java:58)
	at org.gradle.api.tasks.Upload.upload(Upload.java:89)
	... 67 more
Caused by: java.lang.IllegalArgumentException: Illegal character(s) in message header value: Basic am9obnJlbmdlbG1hbjplZDQzYTM5ZTVmOTIyNDdlZWU1NTcyYjBkNjQ0NTZlZDZiOGQ5ZjEwNjI3
YmU3Y2JkZmE5YmIwZmU4ODlhNmYw
	... 88 more

I'm having issues with deploying using the mavenDeployer as it appears that the BinTray apiKey causes an IllegalArgumentException in the http client being used (it's too long).

I haven't found a way around it yet.

Can you attach the full stacktrace?

I leave here a comment to folks like me googling for the same issue: I solved it switching the jvm used to launch gradle from java 6 to java 7 (i.e. setting the JAVA_HOME environment variable).

@drorb - I attached the stack trace.

I am running with JDK 6. I'm going to try @davidecavestro's suggestion and use JDK 7.

Thanks @davidecavestro that worked.

For those who search and reach this page, I'm pretty sure that that the 'Illegal Character' error happens with JDK6 but not JDK7 is that http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4615330 has been fixed in JDK7

Thanks for this post, You saved me the day and hours of bug searching