Android Gradle Plugin开发

最近在进阶技能，想看一下Gradle Plugin开发，以前总觉得plugin牛B，现在自己开始着手写写gradle plugin，但是，一开始写就碰到了问题：

18:13:44.478 [QUIET] [system.out] Task spend time:
18:13:44.478 [DEBUG] [org.gradle.internal.work.DefaultWorkerLeaseService] Worker lease root.1 completed (0 worker(s) in use)
18:13:44.478 [DEBUG] [org.gradle.internal.resources.AbstractTrackedResourceLock] Daemon worker Thread 5: released lock on root.1
18:13:44.479 
18:13:44.479  FAILURE: Build failed with an exception.
18:13:44.479 
18:13:44.479  * Where:
18:13:44.479  Build file 'D:\study\AOPDemo\app\build.gradle' line: 52
18:13:44.479 
18:13:44.479  * What went wrong:
18:13:44.479  A problem occurred evaluating project ':app'.
18:13:44.479  > Failed to apply plugin [class 'GreetingPlugin']
18:13:44.480     > No such property: project for class: GreetingPlugin
18:13:44.480 
18:13:44.480  * Try:
18:13:44.480   Run with --scan to get full insights.
18:13:44.480 
18:13:44.480  * Exception is:
18:13:44.482  org.gradle.api.GradleScriptException: A problem occurred evaluating project ':app'.
18:13:44.482    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:92)
18:13:44.482    at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl$2.run(DefaultScriptPluginFactory.java:206)
18:13:44.482    at org.gradle.configuration.ProjectScriptTarget.addConfiguration(ProjectScriptTarget.java:77)
18:13:44.482    at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:211)
18:13:44.482    at org.gradle.configuration.BuildOperationScriptPlugin$1$1.run(BuildOperationScriptPlugin.java:69)
18:13:44.482    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
18:13:44.482    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
18:13:44.482    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
18:13:44.482    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
18:13:44.482    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
18:13:44.482    at org.gradle.configuration.BuildOperationScriptPlugin$1.execute(BuildOperationScriptPlugin.java:66)
18:13:44.482    at org.gradle.configuration.BuildOperationScriptPlugin$1.execute(BuildOperationScriptPlugin.java:63)
18:13:44.482    at org.gradle.configuration.internal.DefaultUserCodeApplicationContext.apply(DefaultUserCodeApplicationContext.java:48)
18:13:44.482    at org.gradle.configuration.BuildOperationScriptPlugin.apply(BuildOperationScriptPlugin.java:63)
18:13:44.482    at org.gradle.configuration.project.BuildScriptProcessor$1.run(BuildScriptProcessor.java:44)
18:13:44.483    at org.gradle.internal.Factories$1.create(Factories.java:25)
18:13:44.483    at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.withMutableState(DefaultProjectStateRegistry.java:200)
18:13:44.483    at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.withMutableState(DefaultProjectStateRegistry.java:186)
18:13:44.483    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:41)
18:13:44.483    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:26)
18:13:44.483    at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
18:13:44.483    at org.gradle.configuration.project.LifecycleProjectEvaluator$EvaluateProject$1.run(LifecycleProjectEvaluator.java:106)
18:13:44.483    at org.gradle.internal.Factories$1.create(Factories.java:25)
18:13:44.483    at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:183)
18:13:44.483    at org.gradle.internal.work.StopShieldingWorkerLeaseService.withLocks(StopShieldingWorkerLeaseService.java:40)
18:13:44.483    at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.withProjectLock(DefaultProjectStateRegistry.java:226)
18:13:44.483    at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.withMutableState(DefaultProjectStateRegistry.java:220)
18:13:44.483    at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.withMutableState(DefaultProjectStateRegistry.java:186)
18:13:44.483    at org.gradle.configuration.project.LifecycleProjectEvaluator$EvaluateProject.run(LifecycleProjectEvaluator.java:95)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
18:13:44.483    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
18:13:44.483    at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:67)
18:13:44.483    at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:693)
18:13:44.483    at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:141)
18:13:44.483    at org.gradle.execution.TaskPathProjectEvaluator.configure(TaskPathProjectEvaluator.java:35)
18:13:44.483    at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:62)
18:13:44.483    at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:41)
18:13:44.483    at org.gradle.initialization.DefaultGradleLauncher$ConfigureBuild.run(DefaultGradleLauncher.java:302)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
18:13:44.483    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
18:13:44.484    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
18:13:44.484    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
18:13:44.484    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
18:13:44.484    at org.gradle.initialization.DefaultGradleLauncher.configureBuild(DefaultGradleLauncher.java:210)
18:13:44.484    at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151)
18:13:44.484    at org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:134)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController$1.execute(GradleBuildController.java:58)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController$1.execute(GradleBuildController.java:55)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:82)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:75)
18:13:44.484    at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:183)
18:13:44.484    at org.gradle.internal.work.StopShieldingWorkerLeaseService.withLocks(StopShieldingWorkerLeaseService.java:40)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:75)
18:13:44.484    at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:55)
18:13:44.484    at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:31)
18:13:44.484    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
18:13:44.484    at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:58)
18:13:44.484    at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
18:13:44.484    at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:39)
18:13:44.484    at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:49)
18:13:44.484    at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:44)
18:13:44.484    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
18:13:44.484    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
18:13:44.485    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
18:13:44.485    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
18:13:44.485    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
18:13:44.485    at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:44)
18:13:44.485    at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:49)
18:13:44.485    at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:46)
18:13:44.485    at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:78)
18:13:44.485    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:46)
18:13:44.485    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:31)
18:13:44.485    at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:42)
18:13:44.485    at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:28)
18:13:44.485    at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78)
18:13:44.485    at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:52)
18:13:44.485    at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:59)
18:13:44.485    at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:36)
18:13:44.485    at org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:68)
18:13:44.485    at org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:38)
18:13:44.485    at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:37)
18:13:44.485    at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:26)
18:13:44.485    at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
18:13:44.485    at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
18:13:44.485    at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:60)
18:13:44.485    at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:32)
18:13:44.485    at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:55)
18:13:44.485    at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:41)
18:13:44.486    at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:48)
18:13:44.486    at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:32)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
18:13:44.486    at org.gradle.util.Swapper.swap(Swapper.java:38)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
18:13:44.486    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.486    at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62)
18:13:44.487    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
18:13:44.487    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.487    at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:81)
18:13:44.487    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
18:13:44.487    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
18:13:44.487    at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
18:13:44.487    at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295)
18:13:44.487    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
18:13:44.487    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
18:13:44.487    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
18:13:44.487  Caused by: org.gradle.api.internal.plugins.PluginApplicationException: Failed to apply plugin [class 'GreetingPlugin']
18:13:44.487    at org.gradle.api.internal.plugins.DefaultPluginManager.doApply(DefaultPluginManager.java:163)
18:13:44.487    at org.gradle.api.internal.plugins.DefaultPluginManager.apply(DefaultPluginManager.java:137)
18:13:44.487    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyType(DefaultObjectConfigurationAction.java:130)
18:13:44.487    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyPlugin(DefaultObjectConfigurationAction.java:114)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.access$100(DefaultObjectConfigurationAction.java:38)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction$2.run(DefaultObjectConfigurationAction.java:77)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.execute(DefaultObjectConfigurationAction.java:143)
18:13:44.488    at org.gradle.api.internal.project.AbstractPluginAware.apply(AbstractPluginAware.java:46)
18:13:44.488    at org.gradle.api.internal.project.ProjectScript.apply(ProjectScript.java:34)
18:13:44.488    at org.gradle.api.Script$apply$0.callCurrent(Unknown Source)
18:13:44.488    at build_1c5opngy8ng8c02hv61dtcvl2.run(D:\study\AOPDemo\app\build.gradle:62)
18:13:44.488    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:90)
18:13:44.488    ... 119 more
18:13:44.488  Caused by: groovy.lang.MissingPropertyException: No such property: project for class: GreetingPlugin
18:13:44.488    at GreetingPlugin.apply(D:\study\AOPDemo\app\build.gradle:52)
18:13:44.488    at GreetingPlugin.apply(D:\study\AOPDemo\app\build.gradle)
18:13:44.488    at org.gradle.api.internal.plugins.ImperativeOnlyPluginTarget.applyImperative(ImperativeOnlyPluginTarget.java:42)
18:13:44.488    at org.gradle.api.internal.plugins.RuleBasedPluginTarget.applyImperative(RuleBasedPluginTarget.java:50)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultPluginManager.addPlugin(DefaultPluginManager.java:177)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultPluginManager.access$300(DefaultPluginManager.java:51)
18:13:44.488    at org.gradle.api.internal.plugins.DefaultPluginManager$AddPluginBuildOperation.run(DefaultPluginManager.java:267)
18:13:44.488    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExec
utor.java:301)
18:13:44.488    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExec
utor.java:293)
18:13:44.488    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
18:13:44.488    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
18:13:44.489    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
18:13:44.489    at org.gradle.api.internal.plugins.DefaultPluginManager$2.execute(DefaultPluginManager.java:155)
18:13:44.489    at org.gradle.api.internal.plugins.DefaultPluginManager$2.execute(DefaultPluginManager.java:152)
18:13:44.489    at org.gradle.configuration.internal.DefaultUserCodeApplicationContext.apply(DefaultUserCodeApplicationContext.java:48)
18:13:44.489    at org.gradle.api.internal.plugins.DefaultPluginManager.doApply(DefaultPluginManager.java:152)
18:13:44.489    ... 130 more
18:13:44.489 
18:13:44.489 
18:13:44.489  * Get more help at https://help.gradle.org
18:13:44.489 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger]
18:13:44.489 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED in 4s
18:13:44.489 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Completing Build operation 'Run build'
18:13:44.489 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Build operation 'Run build' completed
18:13:44.495 [DEBUG] [org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess] Releasing file lock for Build Output Cleanup Cache (D:\study\AOPDemo\.gradle\buildOutputCleanup)
18:13:44.495 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on Build Output Cleanup Cache (D:\study\AOPDemo\.gradle\buildOutputCleanup).
18:13:44.497 [DEBUG] [org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess] Releasing file lock for cache directory md-supplier (D:\Program Files\Android\.gradle\caches\5.1.1\md-supplier)
18:13:44.498 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on cache directory md-supplier (D:\Program Files\Android\.gradle\caches\5.1.1\md-supplier).
18:13:44.499 [DEBUG] [org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess] Releasing file lock for cache directory md-rule (D:\Program Files\Android\.gradle\caches\5.1.1\md-rule)
18:13:44.499 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on cache directory md-rule (D:\Program Files\Android\.gradle\caches\5.1.1\md-rule).
18:13:44.501 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.resolveengine.store.CachedStoreFactory] Resolution result cache closed. Cache reads: 0, disk reads: 0 (avg: 0.0 secs, total: 0.0 secs)
18:13:44.517 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.resolveengine.store.CachedStoreFactory] Resolution result cache closed. Cache reads: 0, disk reads: 0 (avg: 0.0 secs, total: 0.0 secs)
18:13:44.517 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.resolveengine.store.ResolutionResultsStoreFactory] Deleted 2 resolution results binary files in 0.016 secs
18:13:44.518 [DEBUG] [org.gradle.deployment.internal.DefaultDeploymentRegistry] Stopping 0 deployment handles
18:13:44.518 [DEBUG] [org.gradle.deployment.internal.DefaultDeploymentRegistry] Stopped deployment handles
18:13:44.519 [DEBUG] [org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess] Releasing file lock for file hash cache (D:\study\AOPDemo\.gradle\5.1.1\fileHashes)
18:13:44.519 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on file hash cache (D:\study\AOPDemo\.gradle\5.1.1\fileHashes).
18:13:44.521 [DEBUG] [org.gradle.cache.internal.DefaultPersistentDirectoryStore] VCS Checkout Cache (D:\study\AOPDemo\.gradle\vcs-1) has last been fully cleaned up 8 hours ago
18:13:44.521 [DEBUG] [org.gradle.cache.internal.DefaultCacheAccess] Cache VCS Checkout Cache (D:\study\AOPDemo\.gradle\vcs-1) was closed 0 times.
18:13:44.521 [DEBUG] [org.gradle.cache.internal.DefaultCacheAccess] Cache VCS metadata (D:\study\AOPDemo\.gradle\5.1.1\vcsMetadata-1) was closed 0 times.
18:13:44.533 [DEBUG] [org.gradle.launcher.daemon.server.exec.ExecuteBuild] The daemon has finished executing the build.
18:13:44.625 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientInputForwarder] Dispatching close input message: org.gradle.launcher.daemon.protocol.CloseInput@453fd943
18:13:45.039 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] thread 15: dispatching class org.gradle.launcher.daemon.protocol.CloseInput
18:13:45.041 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClient] Received result Success[value=org.gradle.launcher.exec.BuildActionResult@37883b97] from daemon DaemonInfo{pid=10576, address=[689e60e4-e
4c1-4bf9-8bad-246cf2ae1c5f port:55587, addresses:[/127.0.0.1, /0:0:0:0:0:0:0:1]], state=Idle, lastBusy=1571738772306, context=DefaultDaemonContext[uid=26cac639-0765-4dd8-9b73-8fd46767b601,javaHome=D:\Androi
d\Java\jdk1.8.0_181,daemonRegistryDir=D:\Program Files\Android\.gradle\daemon,pid=10576,idleTimeout=10800000,priority=NORMAL,daemonOpts=-noverify,-Xmx1536m,-Dfile.encoding=GBK,-Duser.country=CN,-Duser.langu
age=zh,-Duser.variant]} (build should be done).
18:13:45.042 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] thread 1: dispatching class org.gradle.launcher.daemon.protocol.Finished
18:13:45.043 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] thread 1: connection stop

看到这些东西就头痛！！！！
大致看下了意思是说，GreetingPlugin插件中没有project属性。
先看看代码：

class GreetingPluginExtension{
    String message = "Hello from GreetingPlugin"
}

class GreetingPlugin implements Plugin{

    @Override
    void apply(Project target) {
        def extension  = project.extensions.create('greeting',GreetingPluginExtension)

        project.task('hello'){
            doLast {
                println extension.message
            }
        }
    }
}

apply plugin: GreetingPlugin //应用插件，这样插件才能在gradle构建过程中生效。

看到apply方法，发现project确实没有这个属性，但是系统貌似不会提示，这个很是让人糟心。修改一下属性就ok了：

@Override
    void apply(Project target) {
        def extension  = target.extensions.create('greeting',GreetingPluginExtension)

        target.task('hello'){
            doLast {
                println extension.message
            }
        }
    }

这是我的一个小疏忽，但是不管怎么样，以后遇到属性不匹配的问题，还是要好好检查自己的代码。