我在Jenkins中使用Git Pull Request Builder插件将Pull请求链接到Jenkins。作业由钩子触发，一切运行顺利。

不过，在构建结束时，我想在失败/成功或错误时添加一条注释。

我尝试使用管道并使用

pullRequest.comment('This is a comment sent from the Pipeline')

但是它无法识别（我为github安装了管道）：

groovy.lang.MissingPropertyException: No such property: pullRequest for class: groovy.lang.Binding
  at groovy.lang.Binding.getVariable(Binding.java:63)
  at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onGetProperty(SandboxInterceptor.java:242)
  at org.kohsuke.groovy.sandbox.impl.Checker$6.call(Checker.java:288)
  at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:292)
  at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:268)
  at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:268)
  at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.getProperty(SandboxInvoker.java:29)
  at com.cloudbees.groovy.cps.impl.PropertyAccessBlock.rawGet(PropertyAccessBlock.java:20)
  at WorkflowScript.run(WorkflowScript:5)
  at ___cps.transform___(Native Method)
  at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.get(PropertyishBlock.java:74)
  at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
  at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.fixName(PropertyishBlock.java:66)
  at sun.reflect.GeneratedMethodAccessor446.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
  at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
  at com.cloudbees.groovy.cps.Next.step(Next.java:83)
  at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
  at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
  at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:122)
  at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:261)
  at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
  at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$101(SandboxContinuable.java:34)
  at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.lambda$run0$0(SandboxContinuable.java:59)
  at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
  at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:58)
  at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:174)
  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:332)
  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:83)
  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:244)
  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:232)
  at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
  at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
  at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE

使用自由式作业：

java.lang.NullPointerException
  at org.jenkinsci.plugins.github.pullrequest.utils.JobHelper.getGhRepositoryFromPRTrigger(JobHelper.java:162)
  at org.jenkinsci.plugins.github.pullrequest.utils.JobHelper.getGhPullRequest(JobHelper.java:178)
  at org.jenkinsci.plugins.github.pullrequest.publishers.impl.GitHubPRCommentPublisher.perform(GitHubPRCommentPublisher.java:72)
  at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:81)
  at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
  at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:744)
  at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:690)
  at hudson.model.Build$BuildExecution.post2(Build.java:186)
  at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:635)
  at hudson.model.Run.execute(Run.java:1752)
  at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
  at hudson.model.ResourceController.execute(ResourceController.java:97)
  at hudson.model.Executor.run(Executor.java:429)
Build step 'GitHub PR: post comment' marked build as failure

现在我真的不知道在哪里找