[CI] Record Github commit statuses outside of PRs

.ci/pipeline-library/build.gradle

@@ -20,6 +20,7 @@ dependencies {
   implementation 'org.jenkins-ci.plugins.workflow:workflow-step-api:2.19@jar'
   testImplementation 'com.lesfurets:jenkins-pipeline-unit:1.4'
   testImplementation 'junit:junit:4.12'
+  testImplementation 'org.mockito:mockito-core:2.+'
   testImplementation 'org.assertj:assertj-core:3.15+' // Temporary https://github.com/jenkinsci/JenkinsPipelineUnit/issues/209
 }
 

.ci/pipeline-library/src/test/KibanaBasePipelineTest.groovy

@@ -19,9 +19,9 @@ class KibanaBasePipelineTest extends BasePipelineTest {
     env.BUILD_DISPLAY_NAME = "#${env.BUILD_ID}"
 
     env.JENKINS_URL = 'http://jenkins.localhost:8080'
-    env.BUILD_URL = "${env.JENKINS_URL}/job/elastic+kibana+${env.BRANCH_NAME}/${env.BUILD_ID}/"
+    env.BUILD_URL = "${env.JENKINS_URL}/job/elastic+kibana+${env.BRANCH_NAME}/${env.BUILD_ID}/".toString()
 
-    env.JOB_BASE_NAME = "elastic / kibana # ${env.BRANCH_NAME}"
+    env.JOB_BASE_NAME = "elastic / kibana # ${env.BRANCH_NAME}".toString()
     env.JOB_NAME = env.JOB_BASE_NAME
 
     env.WORKSPACE = 'WS'
@@ -31,6 +31,9 @@ class KibanaBasePipelineTest extends BasePipelineTest {
         getBuildStatus: { 'SUCCESS' },
         printStacktrace: { ex -> print ex },
       ],
+      githubPr: [
+        isPr: { false },
+      ],
       jenkinsApi: [ getFailedSteps: { [] } ],
       testUtils: [ getFailures: { [] } ],
     ])

.ci/pipeline-library/src/test/buildState.groovy

@@ -0,0 +1,48 @@
+import org.junit.*
+import static groovy.test.GroovyAssert.*
+
+class BuildStateTest extends KibanaBasePipelineTest {
+  def buildState
+
+  @Before
+  void setUp() {
+    super.setUp()
+
+    buildState = loadScript("vars/buildState.groovy")
+  }
+
+  @Test
+  void 'get() returns existing data'() {
+    buildState.add('test', 1)
+    def actual = buildState.get('test')
+    assertEquals(1, actual)
+  }
+
+  @Test
+  void 'get() returns null for missing data'() {
+    def actual = buildState.get('missing_key')
+    assertEquals(null, actual)
+  }
+
+  @Test
+  void 'add() does not overwrite existing keys'() {
+    assertTrue(buildState.add('test', 1))
+    assertFalse(buildState.add('test', 2))
+
+    def actual = buildState.get('test')
+
+    assertEquals(1, actual)
+  }
+
+  @Test
+  void 'set() overwrites existing keys'() {
+    assertFalse(buildState.has('test'))
+    buildState.set('test', 1)
+    assertTrue(buildState.has('test'))
+    buildState.set('test', 2)
+
+    def actual = buildState.get('test')
+
+    assertEquals(2, actual)
+  }
+}

.ci/pipeline-library/src/test/githubCommitStatus.groovy

@@ -0,0 +1,85 @@
+import org.junit.*
+import static org.mockito.Mockito.*;
+
+class GithubCommitStatusTest extends KibanaBasePipelineTest {
+  def githubCommitStatus
+  def githubApiMock
+  def buildStateMock
+
+  def EXPECTED_STATUS_URL = 'repos/elastic/kibana/statuses/COMMIT_HASH'
+  def EXPECTED_CONTEXT = 'kibana-ci'
+  def EXPECTED_BUILD_URL = 'http://jenkins.localhost:8080/job/elastic+kibana+master/1/'
+
+  interface BuildState {
+    Object get(String key)
+  }
+
+  interface GithubApi {
+    Object post(String url, Map data)
+  }
+
+  @Before
+  void setUp() {
+    super.setUp()
+
+    buildStateMock = mock(BuildState)
+    githubApiMock = mock(GithubApi)
+
+    when(buildStateMock.get('checkoutInfo')).thenReturn([ commit: 'COMMIT_HASH', ])
+    when(githubApiMock.post(any(), any())).thenReturn(null)
+
+    props([
+      buildState: buildStateMock,
+      githubApi: githubApiMock,
+    ])
+
+    githubCommitStatus = loadScript("vars/githubCommitStatus.groovy")
+  }
+
+  void verifyStatusCreate(String state, String description) {
+    verify(githubApiMock).post(
+      EXPECTED_STATUS_URL,
+      [
+        'state': state,
+        'description': description,
+        'context': EXPECTED_CONTEXT,
+        'target_url': EXPECTED_BUILD_URL,
+      ]
+    )
+  }
+
+  @Test
+  void 'onStart() should create a pending status'() {
+    githubCommitStatus.onStart()
+    verifyStatusCreate('pending', 'Build started.')
+  }
+
+  @Test
+  void 'onFinish() should create a success status'() {
+    githubCommitStatus.onFinish()
+    verifyStatusCreate('success', 'Build completed successfully.')
+  }
+
+  @Test
+  void 'onFinish() should create an error status for failed builds'() {
+    mockFailureBuild()
+    githubCommitStatus.onFinish()
+    verifyStatusCreate('error', 'Build failed.')
+  }
+
+  @Test
+  void 'onStart() should exit early for PRs'() {
+    prop('githubPr', [ isPr: { true } ])
+
+    githubCommitStatus.onStart()
+    verifyZeroInteractions(githubApiMock)
+  }
+
+  @Test
+  void 'onFinish() should exit early for PRs'() {
+    prop('githubPr', [ isPr: { true } ])
+
+    githubCommitStatus.onFinish()
+    verifyZeroInteractions(githubApiMock)
+  }
+}

Jenkinsfile

@@ -3,7 +3,7 @@
 library 'kibana-pipeline-library'
 kibanaLibrary.load()
 
-kibanaPipeline(timeoutMinutes: 155, checkPrChanges: true) {
+kibanaPipeline(timeoutMinutes: 155, checkPrChanges: true, setCommitStatus: true) {
   githubPr.withDefaultPrComments {
     ciStats.trackBuild {
       catchError {

vars/buildState.groovy

@@ -0,0 +1,30 @@
+import groovy.transform.Field
+
+public static @Field JENKINS_BUILD_STATE = [:]
+
+def add(key, value) {
+  if (!buildState.JENKINS_BUILD_STATE.containsKey(key)) {
+    buildState.JENKINS_BUILD_STATE[key] = value
+    return true
+  }
+
+  return false
+}
+
+def set(key, value) {
+  buildState.JENKINS_BUILD_STATE[key] = value
+}
+
+def get(key) {
+  return buildState.JENKINS_BUILD_STATE[key]
+}
+
+def has(key) {
+  return buildState.JENKINS_BUILD_STATE.containsKey(key)
+}
+
+def get() {
+  return buildState.JENKINS_BUILD_STATE
+}
+
+return this

vars/githubCommitStatus.groovy

@@ -0,0 +1,42 @@
+def shouldCreateStatuses() {
+  return !githubPr.isPr() && buildState.get('checkoutInfo')
+}
+
+def onStart() {
+  catchError {
+    if (!shouldCreateStatuses()) {
+      return
+    }
+
+    def checkoutInfo = buildState.get('checkoutInfo')
+    create(checkoutInfo.commit, 'pending', 'Build started.')
+  }
+}
+
+def onFinish() {
+  catchError {
+    if (!shouldCreateStatuses()) {
+      return
+    }
+
+    def checkoutInfo = buildState.get('checkoutInfo')
+    def status = buildUtils.getBuildStatus()
+
+    if (status == 'SUCCESS' || status == 'UNSTABLE') {
+      create(checkoutInfo.commit, 'success', 'Build completed successfully.')
+    } else if(status == 'ABORTED') {
+      create(checkoutInfo.commit, 'error', 'Build aborted or timed out.')
+    } else {
+      create(checkoutInfo.commit, 'error', 'Build failed.')
+    }
+  }
+}
+
+// state: error|failure|pending|success
+def create(sha, state, description, context = 'kibana-ci') {
+  withGithubCredentials {
+    return githubApi.post("repos/elastic/kibana/statuses/${sha}", [ state: state, description: description, context: context, target_url: env.BUILD_URL ])
+  }
+}
+
+return this

vars/kibanaPipeline.groovy

@@ -214,12 +214,15 @@ def runErrorReporter() {
 }
 
 def call(Map params = [:], Closure closure) {
-  def config = [timeoutMinutes: 135, checkPrChanges: false] + params
+  def config = [timeoutMinutes: 135, checkPrChanges: false, setCommitStatus: false] + params
 
   stage("Kibana Pipeline") {
     timeout(time: config.timeoutMinutes, unit: 'MINUTES') {
       timestamps {
         ansiColor('xterm') {
+          if (config.setCommitStatus) {
+            buildState.set('shouldSetCommitStatus', true)
+          }
           if (config.checkPrChanges && githubPr.isPr()) {
             pipelineLibraryTests()
 
@@ -230,7 +233,13 @@ def call(Map params = [:], Closure closure) {
               return
             }
           }
-          closure()
+          try {
+            closure()
+          } finally {
+            if (config.setCommitStatus) {
+              githubCommitStatus.onFinish()
+            }
+          }
         }
       }
     }

vars/workers.groovy

@@ -65,6 +65,12 @@ def base(Map params, Closure closure) {
 
       dir("kibana") {
         checkoutInfo = getCheckoutInfo()
+
+        // use `checkoutInfo` as a flag to indicate that we've already reported the pending commit status
+        if (buildState.get('shouldSetCommitStatus') && !buildState.has('checkoutInfo')) {
+          buildState.set('checkoutInfo', checkoutInfo)
+          githubCommitStatus.onStart()
+        }
       }
 
       ciStats.reportGitInfo(