Add production mode in PR bot

pr/prbot/main.go

@@ -21,5 +21,11 @@ func main() {
 		log.Fatal("HUB_BOT_SECRET not found")
 	}
 
-	webhook.NewReceiver(*webhookAddr, hookSecret, botSecret).Start()
+	prodFlag := false
+
+	if os.Getenv("BOT_ENV") == "production" {
+		prodFlag = true
+	}
+
+	webhook.NewReceiver(*webhookAddr, hookSecret, botSecret, prodFlag).Start()
 }

pr/webhook/pull_request.go

@@ -56,8 +56,12 @@ func (receiver *Receiver) handlePullRequest(body []byte) {
 	switch *event.Action {
 	case "opened":
 		// Notify maintainers
+		mentionSymbol := "@_"
+		if receiver.production {
+			mentionSymbol = "@"
+		}
 		if len(handles) > 0 {
-			body := "Notifying maintainers: @_" + strings.Join(handles, " @_")
+			body := "Notifying maintainers: " + mentionSymbol + strings.Join(handles, " "+mentionSymbol)
 			err = receiver.githubClient.CreateComment(owner, repo, number, &body)
 			if err != nil {
 				log.Println(err)

pr/webhook/server.go

@@ -14,14 +14,15 @@ import (
 type Receiver struct {
 	listenAddr   string
 	hookSecret   []byte
+	production   bool
 	githubClient *githubapi.Client
 }
 
-func NewReceiver(listenAddr string, hookSecret []byte, botSecret string) *Receiver {
+func NewReceiver(listenAddr string, hookSecret []byte, botSecret string, production bool) *Receiver {
 	return &Receiver{
-		listenAddr: listenAddr,
-		hookSecret: hookSecret,
-		// TODO: canonical owner
+		listenAddr:   listenAddr,
+		hookSecret:   hookSecret,
+		production:   production,
 		githubClient: githubapi.NewClient(botSecret),
 	}
 }