From d1bfac2ad05e47e2d2450798e70bc1f6f3fe26a0 Mon Sep 17 00:00:00 2001
From: Mary Marchini <mmarchini@netflix.com>
Date: Sun, 2 Aug 2020 16:27:18 -0700
Subject: [PATCH 1/2] feat: relay jenkins events to github actions

These changes are meant to allow us to write GitHub Actions in selected
repositories in the nodejs github organization, as a reaction to
Jenkins events.

It works by dispatching repository events, which we can use as triggers
for GitHub Action workflows.

Here's a concrete repository dispatch event caused by the Jenkins job
`node-test-commit-osx`:

```
event_type: jenkins.node-test-commit-osx.start or jenkins.node-test-commit-osx.end

client_payload:
{
  "identifier": "node-test-commit-osx",
  "status": "success",
  "message": "tests passed",
  "commit": "8a5fec2a6bade91e544a30314d7cf21f8a200de1",
  "url": "https://ci.nodejs.org/job/node-test-commit/3157/",
  "ref": "refs/pull/12345/head"
}

```

Refs:
    - https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows#repository_dispatch
    - https://docs.github.com/en/free-pro-team@latest/rest/reference/repos#create-a-repository-dispatch-event
---
 lib/jenkins-events.js  |  5 ++++-
 scripts/event-relay.js | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 scripts/event-relay.js

diff --git a/lib/jenkins-events.js b/lib/jenkins-events.js
index d46991c8..a57cff19 100644
--- a/lib/jenkins-events.js
+++ b/lib/jenkins-events.js
@@ -3,7 +3,9 @@
 const pushJenkinsUpdate = require('../lib/push-jenkins-update')
 
 const debug = require('debug')('jenkins-events')
-const enabledRepos = ['citgm', 'http-parser', 'node', 'node-auto-test']
+const enabledRepos = process.env.JENKINS_ENABLED_REPOS
+  ? process.env.JENKINS_ENABLED_REPOS.split(',')
+  : ['citgm', 'http-parser', 'node', 'node-auto-test']
 
 const listOfKnownJenkinsIps = process.env.JENKINS_WORKER_IPS ? process.env.JENKINS_WORKER_IPS.split(',') : []
 
@@ -74,6 +76,7 @@ module.exports = (app, events) => {
     data.logger.info('Emitting Jenkins event')
     debug(data)
 
+    events.emit(`jenkins`, data)
     return events.emit(`jenkins.${event}`, data)
   }
 }
diff --git a/scripts/event-relay.js b/scripts/event-relay.js
new file mode 100644
index 00000000..d8986cc4
--- /dev/null
+++ b/scripts/event-relay.js
@@ -0,0 +1,25 @@
+'use strict'
+
+const githubClient = require('../lib/github-client')
+
+async function handleJenkinsRelay (event) {
+  const { owner, repo, identifier } = event
+  const eventType = `jenkins.${identifier}.${event.event}`
+  try {
+    event.logger.debug(`Relaying ${eventType} to ${owner}/${repo}`)
+    await githubClient.repos.createDispatchEvent({
+      owner,
+      repo,
+      event_type: eventType,
+      client_payload: event
+    })
+    return true
+  } catch (err) {
+    event.logger.error(err, `Failed to relay ${eventType} to ${owner}/${repo}`)
+    return false
+  }
+}
+
+module.exports = function (_, event) {
+  event.on('jenkins', handleJenkinsRelay)
+}

From 3ef74ac5fb7c5029fbede0f177d676d2f3983c17 Mon Sep 17 00:00:00 2001
From: Phillip Johnsen <johphi@gmail.com>
Date: Sun, 29 Nov 2020 21:05:44 +0100
Subject: [PATCH 2/2] test: verify jenkins event gets relayed as repository
 event

---
 .../event-relay-to-github-actions.test.js     | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 test/integration/event-relay-to-github-actions.test.js

diff --git a/test/integration/event-relay-to-github-actions.test.js b/test/integration/event-relay-to-github-actions.test.js
new file mode 100644
index 00000000..ce69a750
--- /dev/null
+++ b/test/integration/event-relay-to-github-actions.test.js
@@ -0,0 +1,38 @@
+'use strict'
+
+const tap = require('tap')
+const url = require('url')
+const nock = require('nock')
+const supertest = require('supertest')
+
+const { app, events } = require('../../app')
+
+const readFixture = require('../read-fixture')
+
+require('../../scripts/event-relay')(app, events)
+
+tap.test('Sends POST requests to https://api.github.com/repos/nodejs/<repo>/dispatches', (t) => {
+  const jenkinsPayload = readFixture('success-payload.json')
+
+  nock('https://api.github.com')
+    .filteringPath(ignoreQueryParams)
+    .post('/repos/nodejs/node/dispatches')
+    .reply(204)
+    .on('replied', (req, interceptor) => {
+      t.doesNotThrow(() => interceptor.scope.done())
+    })
+
+  t.plan(2)
+
+  supertest(app)
+    .post('/node/jenkins/start')
+    .send(jenkinsPayload)
+    .expect(200)
+    .end((err, res) => {
+      t.equal(err, null)
+    })
+})
+
+function ignoreQueryParams (pathAndQuery) {
+  return url.parse(pathAndQuery, true).pathname
+}