From 195b8b4f63be66f1ab3f08ebdc046ec88fbcf0ee Mon Sep 17 00:00:00 2001
From: Pavel Titenkov <pavel@titenkov.com>
Date: Mon, 27 Nov 2023 22:43:33 +0100
Subject: [PATCH] defect: fail on empty webhook url

---
 index.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/index.js b/index.js
index 8f7a173..3fac54e 100644
--- a/index.js
+++ b/index.js
@@ -126,6 +126,11 @@ try {
     ? `>${commitMessage}\n>${links.commit} | By *${sender.name}* on \`${env.branch}\` | ${links.repository}`
     : `>By *${sender.name}* on \`${env.branch}\` | ${links.repository}`
 
+  if (!process.env.SLACK_WEBHOOK_URL) {
+    core.setFailed('Missing SLACK_WEBHOOK_URL environment variable')
+    return
+  }
+
   const webhook = new IncomingWebhook(process.env.SLACK_WEBHOOK_URL)
   const message = {
     blocks: [