pr: Attempt to assign port maintainers

pr/githubapi/client.go

@@ -11,6 +11,7 @@ type Client interface {
 	GetPullRequest(owner, repo string, number int) (*github.PullRequest, error)
 	ListChangedPortsAndFiles(owner, repo string, number int) (ports []string, commitFiles []*github.CommitFile, err error)
 	CreateComment(owner, repo string, number int, body *string) error
+	AddAssignees(owner, repo string, number int, assignees []string) error
 	ReplaceLabels(owner, repo string, number int, labels []string) error
 	ListLabels(owner, repo string, number int) ([]string, error)
 	ListOrgMembers(org string) ([]*github.User, error)

pr/githubapi/pull_request.go

@@ -54,6 +54,17 @@ func (client *githubClient) CreateComment(owner, repo string, number int, body *
 	return err
 }
 
+func (client *githubClient) AddAssignees(owner, repo string, number int, assignees []string) error {
+	_, _, err := client.Issues.AddAssignees(
+		client.ctx,
+		owner,
+		repo,
+		number,
+		assignees,
+	)
+	return err
+}
+
 func (client *githubClient) ReplaceLabels(owner, repo string, number int, labels []string) error {
 	_, _, err := client.Issues.ReplaceLabelsForIssue(
 		client.ctx,

pr/webhook/pull_request.go

@@ -115,6 +115,10 @@ func (receiver *Receiver) handlePullRequest(body []byte) {
 			body := "Notifying maintainers:\n"
 			for handle, ports := range handles {
 				body += mentionSymbol + handle + " for port " + strings.Join(ports, ", ") + ".\n"
+				err = receiver.githubClient.AddAssignees(owner, repo, number, []string{handle})
+				if err != nil {
+					log.Println(err)
+				}
 			}
 			err = receiver.githubClient.CreateComment(owner, repo, number, &body)
 			if err != nil {

pr/webhook/pull_request_test.go

@@ -138,6 +138,10 @@ func (stub *stubGitHubClient) CreateComment(owner, repo string, number int, body
 	return nil
 }
 
+func (client *stubGitHubClient) AddAssignees(owner, repo string, number int, assignees []string) error {
+	return nil
+}
+
 func (stub *stubGitHubClient) ReplaceLabels(owner, repo string, number int, labels []string) error {
 	stub.newLabels = labels
 	return nil