Add a comment in github pull request in jenkins

Question

I am using Git pull request builder plugin in Jenkins to link the Pull requests to Jenkins. Jobs are triggered with hooks and everything runs smoothly.

Nevertheless, at the end of the build, I'd like to add a comment when there's a fail/success or an error.

I tried using pipeline and use

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

But it doesn't recognize it (I installed pipeline for github):

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

With the freestyle job:

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

Now I don't really know where to look for

Answer 1

I couldn't find a plugin doing it, so I did using curl. Here is my groovy function

def call(def text_pr) {
  def repository_url = scm.userRemoteConfigs[0].url
  def repository_name = repository_url.replace("[email protected]:","").replace(".git","")

  withCredentials([string(credentialsId: '<YOUR-TOKEN-ID>', variable: 'GITHUB_TOKEN')]) {
    sh "curl -s -H \"Authorization: token ${GITHUB_TOKEN}\" -X POST -d '{\"body\": \"${text_pr}\"}' \"https://api.github.com/repos/${repository_name}/issues/${ghprbPullId}/comments\""
  }
}