handle summary updating when message is too long (#1833)

Author: motatoes

backend/utils/pr_comment.go

@@ -91,6 +91,17 @@ func ReportInitialJobsStatus(cr *CommentReporter, jobs []scheduler.Job) error {
 				"|:clock11: **%v**|pending...|\n", job.ProjectName)
 		}
 	}
+
+	const GithubCommentMaxLength = 65536
+
+	if len(message) > GithubCommentMaxLength {
+		// TODO: Handle the case where message is too long by trimming
+		log.Printf("WARN: message is too long, trimming")
+		log.Printf(message)
+		const footer = "[trimmed]"
+		trimLength := len(message) - GithubCommentMaxLength + len(footer)
+		message = message[:len(message)-trimLength] + footer
+	}
 	err := prService.EditComment(prNumber, commentId, message)
 	return err
 }

libs/comment_utils/summary/updater.go

@@ -35,7 +35,20 @@ func (b BasicCommentUpdater) UpdateComment(jobs []scheduler.SerializedJob, prNum
 		message = message + fmt.Sprintf("|%v **%v** |<a href='%v'>%v</a> | <a href='%v'>%v</a> | %v | %v | %v|\n", job.Status.ToEmoji(), jobSpec.ProjectName, *job.WorkflowRunUrl, job.Status.ToString(), prCommentUrl, jobTypeTitle, job.ResourcesCreated, job.ResourcesUpdated, job.ResourcesDeleted)
 	}
 
-	prService.EditComment(prNumber, prCommentId, message)
+	const GithubCommentMaxLength = 65536
+	if len(message) > GithubCommentMaxLength {
+		// TODO: Handle the case where message is too long by trimming
+		log.Printf("WARN: message is too long, trimming")
+		log.Printf(message)
+		const footer = "[trimmed]"
+		trimLength := len(message) - GithubCommentMaxLength + len(footer)
+		message = message[:len(message)-trimLength] + footer
+	}
+
+	err = prService.EditComment(prNumber, prCommentId, message)
+	if err != nil {
+		log.Printf("WARNING: failed to update summary comment: %v", err)
+	}
 	return nil
 }