From 0a71800f9185278c936ceb5ea5e445eb5804932a Mon Sep 17 00:00:00 2001
From: Puru Vijay <awesomepuruvj@gmail.com>
Date: Fri, 20 Sep 2024 22:16:23 +0530
Subject: [PATCH] External link checks

---
 scripts/checks.ts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/scripts/checks.ts b/scripts/checks.ts
index d2aebe3..ffc0c3f 100644
--- a/scripts/checks.ts
+++ b/scripts/checks.ts
@@ -181,6 +181,8 @@ async function checkLinks() {
     const slugErrors = errors.get(slug)!;
     const lines = raw.split('\n');
 
+    const linksToCheck = new Set<string>();
+
     await transform(raw, {
       link({ href }) {
         if (href.startsWith('#')) {
@@ -217,11 +219,27 @@ async function checkLinks() {
               }
             }
           }
+        } else if (/^https?:\/\//.test(href)) {
+          // If the link is an external URL, then add it to the link queue
+          linksToCheck.add(href);
         }
 
         return '';
       },
     });
+
+    // Check links to external URLs
+    for (const link of linksToCheck) {
+      console.log(kleur.dim().bold(`Checking ${slug}:${link}`));
+      const response = await fetch(link);
+      if (!response.ok) {
+        slugErrors.add({
+          message: `External: Link to ${link} is broken`,
+          file: path,
+          line: lines.findIndex(line => line.includes(link)) + 1,
+        });
+      }
+    }
   }
 }