From 03f633d7e8640d131d880e30dc36db1bdc73c7ce Mon Sep 17 00:00:00 2001
From: Aaron Ogata <aogata@instructure.com>
Date: Tue, 1 Sep 2020 10:18:16 -0700
Subject: [PATCH] notify when re-trigger has started

refs DE-111

Test Plan:
1. Ensure that failure message reports patchset number / link when fails.
2. Ensure that re-trigger message reports patchset number / link when starts.

Change-Id: Iccfe85ea8d8f4009a798ce17338272fa06be70f2
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/246678
QA-Review: Aaron Ogata <aogata@instructure.com>
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Ryan Norton <rnorton@instructure.com>
Product-Review: Aaron Ogata <aogata@instructure.com>
---
 Jenkinsfile | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/Jenkinsfile b/Jenkinsfile
index 7a27fea6680..569bc8c4640 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -112,11 +112,23 @@ def postFn(status) {
     def branchSegment = env.GERRIT_BRANCH ? "[$env.GERRIT_BRANCH]" : ''
     def authorSlackId = env.GERRIT_EVENT_ACCOUNT_EMAIL ? slackUserIdFromEmail(email: env.GERRIT_EVENT_ACCOUNT_EMAIL, botUser: true, tokenCredentialId: 'slack-user-id-lookup') : ''
     def authorSlackMsg = authorSlackId ? "<@$authorSlackId>" : env.GERRIT_EVENT_ACCOUNT_NAME
-    def authorSegment = authorSlackMsg ? "Patchset by ${authorSlackMsg}. Please acknowledge and investigate. " : ''
+    def authorSegment = authorSlackMsg ? "Patchset <${env.GERRIT_CHANGE_URL}|#${env.GERRIT_CHANGE_NUMBER}> by ${authorSlackMsg}. Please acknowledge and investigate. " : ''
     slackSend(
       channel: getSlackChannel(),
       color: 'danger',
-      message: "${branchSegment}${env.JOB_NAME} failed on merge. ${authorSegment}(<${env.BUILD_URL}|${env.BUILD_NUMBER}>)"
+      message: "${branchSegment}${env.JOB_NAME} failed on merge. ${authorSegment}(Build <${env.BUILD_URL}|#${env.BUILD_NUMBER}>)"
+    )
+  }
+}
+
+def maybeSlackSendRetrigger() {
+  def userCause = currentBuild.getBuildCauses('com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritUserCause')
+
+  if(userCause && userCause[0].shortDescription.contains('Retriggered')) {
+    slackSend(
+      channel: getSlackChannel(),
+      color: 'warning',
+      message: "Patchset <${env.GERRIT_CHANGE_URL}|#${env.GERRIT_CHANGE_NUMBER}> was re-triggered by ${env.GERRIT_EVENT_ACCOUNT_EMAIL}. Build <${env.BUILD_URL}|#${env.BUILD_NUMBER}>"
     )
   }
 }
@@ -207,6 +219,11 @@ pipeline {
             return
           }
 
+          // Report retriggers to Slack
+          if(configuration.isChangeMerged()) {
+            maybeSlackSendRetrigger()
+          }
+
           // Use a nospot instance for now to avoid really bad UX. Jenkins currently will
           // wait for the current steps to complete (even wait to spin up a node), causing
           // extremely long wait times for a restart. Investigation in DE-166 / DE-158.