Automate PR creation for updates to the Release Notes draft

Author: puerco

cmd/krel/cmd/release_notes.go

@@ -447,7 +447,39 @@ func createDraftPR(tag string, result *releaseNotesResult) (err error) {
 		return errors.Wrapf(err, "pushing %v to remote", userForkName)
 	}
 
-	// TODO: Call github API and create PR against k/sig-release
+	// Create a PR against k/sig-release using the github API
+	gh := github.New()
+
+	// TODO: Maybe read and parse the PR template from sig-release?
+	prBody := fmt.Sprintln(
+		"**What type of PR is this?**",
+		"/kind documentation",
+		"**What this PR does / why we need it**:",
+		fmt.Sprintf("This PR updates the release notes draft to k/k %s", tag),
+		"**Which issue(s) this PR fixes**:",
+		"**Special notes for your reviewer**:",
+		"This is an automated PR generated from `krel The Kubernetes Release Toolbox`",
+	)
+
+	// Create the pull request
+	logrus.Debugf(
+		"PR params: org: %s, repo: %s, headBranch: %s baseBranch: %s",
+		defaultKubernetesSigReleaseOrg, defaultKubernetesSigReleaseRepo, "master",
+		fmt.Sprintf("%s:%s", releaseNotesOpts.draftOrg, branchname),
+	)
+	pr, err := gh.CreatePullRequest(
+		defaultKubernetesSigReleaseOrg, defaultKubernetesSigReleaseRepo, "master",
+		fmt.Sprintf("%s:%s", releaseNotesOpts.draftOrg, branchname),
+		fmt.Sprintf("Update release notes draft to version %s", tag), prBody,
+	)
+
+	if err != nil {
+		logrus.Warnf("An error has occurred while creating the pull request for %s", tag)
+		logrus.Warn("While the PR failed, the release notes draft was generated and submitted to your fork")
+		return errors.Wrap(err, "creating the pull request")
+	}
+
+	logrus.Infof("Successfully created PR #%d", pr.GetNumber())
 	return nil
 }
 
@@ -629,7 +661,7 @@ func createWebsitePR(tag, jsonStr string) (err error) {
 	)
 
 	if err != nil {
-		logrus.Warnf("An error ocurred while creating the pull request for %s", tag)
+		logrus.Warnf("An error has occurred while creating the pull request for %s", tag)
 		logrus.Warn("While the PR failed, the release notes where generated and submitted to your fork")
 		return errors.Wrap(err, "creating the pull request")
 	}